Wcdma bts-alarm-descriptions

BTS Alarm Descriptions
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# Nokia Corporation 1 (125)
Nokia WCDMA Base Station
BTS SW WN3.0 ED1
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The information in this document is subject to change without notice and describes only the
product defined in the introduction of this documentation. This document is intended for the use
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Nokia welcomes customer comments as part of the process of continuous development and
improvement of the documentation.
The information or statements given in this document concerning the suitability, capacity, or
performance of the mentioned hardware or software products cannot be considered binding but
shall be defined in the agreement made between Nokia and the customer. However, Nokia has
made all reasonable efforts to ensure that the instructions contained in the document are
adequate and free of material errors and omissions. Nokia will, if necessary, explain issues
which may not be covered by the document.
Nokia's liability for any errors in the document is limited to the documentary correction of errors.
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OR FOR ANY DAMAGES, INCIDENTAL OR CONSEQUENTIAL (INCLUDING MONETARY
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Other product names mentioned in this document may be trademarks of their respective
companies, and they are mentioned for identification purposes only.
Copyright © Nokia Corporation 2006. All rights reserved.
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Contents
Contents 3
1 About this document 7
2 Alarm handling 9
2.1 General 9
2.2 Instructions for solving problems 9
2.3 Blocking and locking 10
2.4 Identifying faulty units 10
3 Nokia UltraSite and MetroSite WCDMA BTS alarm table 25
4 Alarms 27
4.1 Active clock tuning fault 27
4.2 Antenna# connection fault 28
4.3 ATM, A2EA configuration error 29
4.4 ATM cell loss 29
4.5 ATM faulty 30
4.6 ATM processor faulty 31
4.7 ATM traffic overload 32
4.8 BS SW download or activation failed 32
4.9 BTS Blocked 33
4.10 BTS config error (all units in a cell must be of same freq) 34
4.11 BTS config error (different WTR variants cannot coexist in cell) 34
4.12 BTS config error (incorrect carrier candidates) 35
4.13 BTS config error (Not enough HW for LCR) 36
4.14 BTS config error (WAF overload, 50W not in dual WPA config) 36
4.15 BTS config error (WPA / WSMA version conflict in cell) 37
4.16 BTS config error (WSMA and WSMB cannot coexist) 38
4.17 BTS config error (WTR used as dual TRX behind WSMA) 38
4.18 BTS file error 39
4.19 BTS RNC interface signalling link failure 40
4.20 Cabinet door open 41
4.21 Cell blocked 41
4.22 Cell block rejected by RNC 42
4.23 Cell calibration failure 42
4.24 Cell power monitoring 43
4.25 Cell power parameter out of range 44
4.26 Commissioning parameter mismatch 44
4.27 Communication failure inside WSP 45
4.28 Step change of oven oscillator control over 10% of control range 46
4.29 Diversity branch masthead amplifier fault 48
4.30 DSC-bus failure 50
4.31 DSP failure in radiolink creation 51
4.32 Error in commissioning data 51
4.33 Error in file server during SW download 52
4.34 Failure in AXU initialization 53
4.35 Cooling fan speed has reduced from the set speed 53
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4.36 Fatal alarm 54
4.37 Fault between WAM and WSP SFN (WSP) 55
4.38 Fault in ATM interface 56
4.39 Fault in OM and DSP SW interface 56
4.40 File corrupted in SW download 57
4.41 Flash operation failure 57
4.42 Gain adjust alarm 58
4.43 Incompatible SW version detected 59
4.44 Wrong unit type 60
4.45 Initial calibration not started because other cell not cleared 60
4.46 Invalid carrier in WTR 61
4.47 Invalid frequency channel for the BTS HW 62
4.48 LPA faulty 62
4.49 LPA gain fault 63
4.50 LPA input signal level is too high 63
4.51 LPA linearization fault 64
4.52 LPA power supply alarm 65
4.53 LPA reflected power too high 65
4.54 LPA temperature is dangerously high 66
4.55 Main branch masthead amplifier fault 67
4.56 Mains power break, running battery backup 67
4.57 Major alarm 68
4.58 Minor alarm 69
4.59 Missing NBAP cell parameters, defaults are used 69
4.60 No connection to AXU 70
4.61 No connection to unit 71
4.62 No connection to WEA and unable to detect External alarms 72
4.63 Non-fatal ATM traffic overload 73
4.64 Not enough WAF resources in LCR 73
4.65 Not enough WSP resources per cell 74
4.66 No WSM resources 75
4.67 Oven oscillator clock missing 75
4.68 Oven oscillator heating failure 76
4.69 POST test failed 77
4.70 Power unit input voltage fault 77
4.71 Power unit output voltage fault 78
4.72 R-bus error 79
4.73 ROM disk corrupted during SW update 80
4.74 SFN synchronization failure 80
4.77 Smoke alarm 82
4.78 SW does not support commissioning file 82
4.79 System frame clock signal missing 83
4.80 T-bus error 83
4.81 Telecom cell enabling or disabling failed 84
4.82 Telecom configuration failure 85
4.83 Timeout, commissioned resource not ready 85
4.84 Too many carriers allocated for LPA 86
4.85 Traffic flow in a non-existent ATM connection 87
4.86 Transmission clock missing 87
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4.87 TX output power measurement fault 88
4.88 Unit autonomous reset as a recovery action 89
4.89 Unit blocked 89
4.90 Unit has lost connection to temperature sensor 90
4.91 Unit initialization failure 91
4.92 Unit initialization failure 92
4.93 Unit not supported by current BTS SW version 93
4.94 Unit SW download failed 94
4.95 Unit synchronization failed 95
4.96 Unit temperature is high 95
4.97 Unknown cabinet type 96
4.98 Unknown HW resource 96
4.99 [User defined] 97
4.100 WAF low noise amplifier faulty 98
4.101 WAM SFN polling timeout 98
4.102 WCI baseband reference clock failure 99
4.103 WEA power regulator fault 100
4.104 WIB unit AC line break fault 101
4.105 WIB unit battery failure 101
4.106 WIB unit battery temperature out of range 102
4.107 WIB unit power back-up time alarm 102
4.108 WMC oven oscillator fault 103
4.109 WPA power level changed 105
4.110 WSC oven oscillator fault 105
4.111 WSC phase difference jammed to zero reading 109
4.112 WSC switch unsuccessful 111
4.113 WSC/WMC transmission clock missing 111
4.114 WSMA ST-bus error 112
4.115 WSMA T-bus error 113
4.116 WSMB does not receive frame clock 114
4.117 WSMB RR-bus error 115
4.118 WSMB SR-bus error 115
4.119 WSMB ST-bus error 116
4.120 WSMB T-bus error 117
4.121 WSP PCI-bus failure 118
4.122 WSP unit internal failure 119
4.123 WTR internal clock faulty 119
4.124 WTR internal clock faulty 120
4.125 WTR local oscillator not locked 120
4.126 WTR loop synthesizer not locked 121
4.127 WTR output power decreased 122
4.128 WTR output power fault 122
4.129 WTR power supply voltage fault 123
4.130 WTR RT-bus fault 123
4.131 WTR synthesizer is not locked 124
4.132 WTR temperature is high 125
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1 About this document
The purpose of this document is to describe the alarms and alarm handling of the
Nokia UltraSite WCDMA Base Station (BTS) family, the Nokia MetroSite
WCDMA Base Station and the Nokia MetroSite 50 WCDMA Base Station. BTS
software (SW) uses these alarms as a basis for internal diagnosis and fault
reporting through the Radio Network Controller (RNC) to the Operations Support
System (OSS) and BTS Site Manager.
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2 Alarm handling
2.1 General
Base Station (BTS) alarm handling is based on unit state information. It prevents
the sending of unnecessary alarms by checking and updating unit states. Fault
messages come either from hardware devices or software components. The faults
are system or hardware specific. The Fault Diagnosis System creates upper
network alarms, which are based on an analysis of the faults, and sends them to
the BTS Site Manager and RNC.
In addition to routing to the RNC, the alarms are buffered and, for example,
active BTS alarms can be seen from the RNC. NetAct is used for handling the
BTS alarms.
The BTS is able to maintain alarm handling after it has been commissioned and is
in a configured state. During the start-up, the BTS waits for the real time clock
from the Network Time Protocol (NTP) server, and the fault diagnosis starts after
the time has been set or a time-out has been detected. If the BTS is unable to set
the time using the NTP server, the default time (1.1.1990) will be used.
2.2 Instructions for solving problems
When starting to solve a problem, first refer to the instructions given in the
individual alarm descriptions.
Verify the configuration of a BTS by checking the commissioning, cabling and
correct installation of the units at the BTS. Make sure the environment does not
cause the fault. For more information on implementation, normal daily
operations, maintenance, and troubleshooting, refer to Nokia UltraSite WCDMA
Base Station (BTS) family, Nokia MetroSite WCDMA Base Station and Nokia
MetroSite 50 WCDMA Base Station Product Documentation sets.
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If an active alarm is a 'Start' alarm, a unit block/unblock (if supported by the unit)
or site reset is required to cancel it. If the site reset or unit block/unblock does not
help, replace the faulty unit. See the fields 'Source of the alarm' and 'Instructions'
in the corresponding alarm description.
If you cannot solve the problem by yourself, contact the local Help Desk.
2.3 Blocking and locking
The 'Cancel' alarms are always sent to hosts (BTS Site Manager and RNC). When
the unit or cell is in a blocked state, the 'Start' alarms are only sent to the BTS Site
Manager.
When a unit or cell is unblocked, all the active alarms related to the unblocked
unit or cell are automatically sent to the hosts. The locked or unlocked state of a
cell has no effect on sending alarms to the hosts.
2.4 Identifying faulty units
This section describes how the plug-in units are identified in different WCDMA
BTS cabinets and how a faulty unit can be located with the NetAct system.
See below the explanations of an example 'Alarm Dialog' window for different
fields in Figure NetAct Alarms window.
. 7652 *: reported severity
. Suppl info field: fault name
.
Diag info field:
(01) number of the rack where the plug-in unit is located
(HEX)
(02) number of the shelf where the plug-in unit is located
(HEX)
(0A) number of the slot where the plug-in unit is located
(HEX)
(0010) not applicable
(WFAA 04) faulty unit and ID
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Unit location numbers are used in alarm information to locate a failed unit. The
main principle for numbering locations is from top to bottom and from the left to
the right. Location numbers are defined with the following parameters:
RACK Specifies the rack of the cabinet and separates BB and RF
compartments from each other
SHELF Specifies the shelf in the cabinet
SLOT Specifies the location on the shelf
The figures below indicate how the rack, shelf and slot are defined in different
WCDMA BTS cabinets.
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Figure 1. Supreme cabinet
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Figure 2. Optima cabinet
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Figure 3. Optima Compact Outdoor (WREB) cabinet
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Figure 4. Optima Compact IBBU cabinet
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Figure 5. Optima Compact RF extension cabinet
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Figure 6. Triple-mode cabinet
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Figure 7. MetroSite cabinet
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Figure 8. MetroSite 50 cabinet
The figures below indicate how the fans are defined in different WCDMA BTS
cabinets.
Note fan control naming: 'FAN UNIT' refers to a group of fans including the fan
control unit. A 'fan' is a single blower.
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Figure 9. Fan mapping in Supreme cabinet
Figure 10. Fan mapping in Optima Compact Outdoor (WREB) cabinet
WTR
WPA
53 55 57
54 56 58
153 154
HEX FAN
155
MFUAMFUA MFUA
59
WFD
WEAC
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Figure 11. Fan mapping in Optima Compact IBBU cabinet
Figure 12. Fan mapping in Optima Compact RF extension cabinet
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Figure 13. Fan mapping in Triple-mode cabinet
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Figure 14. Fan mapping in MetroSite cabinet
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Figure 15. Fan mapping in MetroSite 50 cabinet
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3 Nokia UltraSite and MetroSite WCDMA
BTS alarm table
The table below describes the fields in the alarm table:
Table 1. Description of the fields in the alarm table
Name: The name of the fault.
Product: The name of the product in question.
Detecting unit: The unit that detects the fault.
Fault source: The equipment suspected to be faulty (sub-unit in parentheses).
Note that sometimes the actual source of the alarm is different than the one that
detects the fault.
Meaning: A description of the fault situation.
Event type: The options are:
Event (Transient or Distur)
.
Event type alarms can be seen in the RNC in 'Alarm History'
.
Notification type alarm
. 'Event' alarm is not cancelled, because it is never active
. No recovery actions
.
Event type alarm is shown in the BTS Site Manager as 'Transient' and in RNC as
'Distur'
Start
.
Alarm, a fault situation
.
The alarm is not automatically cleared (without manual operation and maintenance
work), even though the problem has been solved, but requires at least blocking/
unblocking the unit or site reset.
.
Recovery actions depend on the reported severity
Start/Cancel
. Faults can be in a start or cancel state
.
The alarm is automatically cleared when the problem has been solved
Unit status: The options are:
Out of order The unit does not work
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Table 1. Description of the fields in the alarm table (cont.)
Degraded The main functions of the unit work, but not all
Working All functions are working, but some trouble has been
notified
Info Status change information
Effect: A description of how this fault affects the operations of this unit, and how it affects the
operations of other units. The following questions are considered:
Does the status of the unit or its sub-units have any effect on the interpretation of the
fault?
Does the fault have an effect on other active faults?
Reported alarms: 7650 BASE STATION FAULTY
.
Start, disables all cells
. Cancel, causes a site reset
.
No new 7651, 7653 or 7654 alarms are reported when 7650 is active
7651 BASE STATION OPERATION DEGRADED
. There is no limit to how many 7651 alarms can be active at the same time
7652 BASE STATION NOTIFICATION
.
There is no limit to how many 7652 alarms can be active at the same time
7653 CELL FAULTY
. Start, the affected cell state is set disabled
.
Cancel, the affected cell state is set enabled
7654 CELL OPERATION DEGRADED
. There is no limit to how many 7654 alarms can be active at the same time
7655 CELL NOTIFICATION
.
There is no limit to how many 7655 alarms can be active at the same time
LED display: The colour of the LED representing the fault level of the unit. The options are:
Stable red Major alarm
Blinking red Minor alarm
Stable yellow Unit in standby state or unit blocking
Blinking yellow Unit in self-heating state or software downloading
Stable green Unit on and working
Alternating red and green
MHA faulty
Instructions: Describes the actions required to clear the alarm.
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4 Alarms
4.1 Active clock tuning fault
Name Active clock tuning fault
Product Supreme; Optima; MetroSite; Triplemode
Detecting unit WAM
Fault source Active WSC, WMC
Meaning Phase measurement cannot be performed
in the active WSC or WMC.
Event type Start / Cancel
Unit status Degraded
Effect If there is only one WSC or both the
active and redundant WSCs are faulty,
the synchronisation does not work and
the BTS is not operational. If there is a
redundant WSC and the recovery switch
operation was successful, the BTS can
work normally. If the unit is WMC and it is
faulty, the synchronisation does not work
and the BTS is not operational.
Reported alarms 7651 BASE STATION OPERATION
DEGRADED (if no working WSC or
WMC)
7652 BASE STATION NOTIFICATION (if
working redundant WSC available)
LED display Stable red
Instructions 1. 1. Fast tuning (refer to BTS Manager/
Fast Tuning).
2. Block/unblock the alarming unit.
3. Replace the alarming clock unit.
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Note that because of a fault situation in
the active clock, the redundant clock is
not tuned. To make sure that the tuning
is correct, run "Fast Tune BTS Clock"
with the BTS Site Manager after
switchover when the new WSC is taken
into use.
If there is a WMC or only one WSC, the
tuning will continue but cells will remain
disabled.
4.2 Antenna# connection fault
Name Antenna# connection fault
Product Supreme; Optima; Optima IBBU; Optima
Compact RF Extension; MetroSite;
Triplemode; MetroSite 50
Detecting unit WAF
Fault source WAF
Meaning The Bias-T has detected that the reflected
TX power from the antenna has
increased. The antenna cable between
the WAF and MHA is faulty or the
antenna is faulty. The BIAS-T may be
faulty.
Event type Start
Unit status Out of order
Effect The cell is out of use.
Reported alarms 7653 CELL FAULTY (all TX/RX-BTUs in
the cell are faulty)
(there is a working /degraded BTU in the
cell)
LED display N/A
Instructions 1. Check the Bias-T and MHA
commissioning.
2. Block/unblock the WAF unit (check if
alarm reappears after 5 minutes).
3. Check the antenna line (refer to the
document WCDMA BTS
Troubleshooting Instructions).
4. Check the PITA Cable connection
(RJ45).
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a. Check the voltage (refer to
connector pins in the document
WCDMA BTS Troubleshooting
Instructions).
b. Check the right connection (refer to
the User Manual).
c. Check by cross-connecting RJ45
cables between other sectors.
4.3 ATM, A2EA configuration error
Name ATM, A2EA configuration error
Detecting unit WAM
Fault source WAM
Meaning The RNC A2EA transport layer address
does not comply with the given BTS
A2EA address.
This alarm is reported to BTS Site
Manager only.
Event type Start
Unit status Working
Effect If AAL2 multiplexing is not in use, BTS
operation is not affected. If the error is in
the AXC (if AAL2 multiplexing is in use),
the BTS may reject AAL2 connection
establishment requests.
Reported alarms 7652 BASE STATION NOTIFICATION
LED display Stable green
Instructions Check and re-commission the AXC (if
AAL2 multiplexing is in use), RNC or BTS
with the correct BTS A2EA addresses.
4.4 ATM cell loss
Name ATM cell loss
Product
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Supreme; Optima; Optima IBBU; Otima
Detecting unit WAM
Fault source WAM
Meaning ATM cells are lost. The cell loss can be
caused by a traffic overload, by the WAM
receiving an invalid ATM cell or AAL5
packet, or by the data corruption on Iub
(that is, bad BER).
The most common causes for this alarm
are transmission network problems
(causing unnecessary WAM changes).
Unit status Working
Effect This can result in data loss and resending
of data.
LED display Blinking red
Instructions 1. Check that Bandwidths (that is, cells/s)
are the same at BTS, AXC and RNC.
2. Check the data integrity from the
incoming Iub (refer to the document
Instructions).
3. Check the other transmission
elements´ active alarms (refer to AXC
Alarm Manual).
4. Check the WAM, AXU and the cabling
between them.
4.5 ATM faulty
Name ATM faulty
Detecting unit WAM
Fault source WAM
Meaning A WAM internal failure.
Event type Start
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Effect The BTS capacity decreases. If the faulty
unit is the master WAM, the BTS is faulty.
Reported alarms 7650 BASE STATION FAULTY (master
WAM)
7651 BASE STATION OPERATION
DEGRADED (slave WAM)
Instructions 1. If ping to BTS is working, restart the
BTS remotely.
2. If ping to BTS is not working but ping to
AXC is working, then restart AXC
remotely so that the BTS is also
restarted automatically.
3. Ping the AXC. If not working, visit the
site and restart the BTS. If this does not
help, replace the alarming WAM unit.
4.6 ATM processor faulty
Name ATM processor faulty
Detecting unit WAM
Fault source WAM, WSPC, WSPD, WSPE
Meaning There is a fault in the WAM processor
SFN interrupt or the SFN is not being
updated in the WSPC/WSPD/WSPE
MCU.
There is a fault in the WAM internal bus
or between the WAM and WSP.
There is a MCU failure in the WAM or the
ATM loop test at startup has failed.
Event type Start
Effect The BTS capacity is decreased.
DEGRADED
Instructions 1. If ping to BTS is working, restart the
BTS remotely.
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2. If ping to BTS is not working but ping to
AXC is working, then restart AXC
remotely so that the BTS is also
restarted automatically.
3. Ping the AXC. If not working, visit the
site and restart the BTS. If this does not
help, replace the alarming WAM unit.
4.7 ATM traffic overload
Name ATM traffic overload
Detecting unit WAM
Fault source WAM, WSPC
Meaning A buffer overflow caused by traffic
overload. The maximum capacity is
exceeded and some data discarded.
Effect This alarm has variable consequences.
Calls may be cut off and, in worst cases,
cells may be disabled.
DEGRADED
Instructions 1. Check that Bandwidths (that is, cells/s)
are the same at BTS, AXC and RNC.
2. Check the data integrity from the
incoming Iub (refer to the document
Instructions).
3. Check the other transmission
elements´ active alarms (refer to AXC
Alarm Manual).
4.8 BS SW download or activation failed
Name BS SW download or activation failed
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Detecting unit WAM
Fault source WAM, WTR, WPA/WMP
Meaning The SW update to the BTS has failed.
The error can be caused by a unit reset
during the SW update, a hardware
problem in the unit or cabinet, or a
corrupted flash file system.
Effect The SW update to this BTS may not be
possible without special actions. The BTS
continues its operation with the old
software.
DEGRADED
Instructions 1. Retry the SW update.
2. If the "ROM disk corrupted during SW
update" or other flash memory-related
alarm is active for the faulty unit at the
same time, replace the faulty unit.
4.9 BTS Blocked
Name BTS Blocked
Product Supreme; Optima;Optima IBBU; Optima
Detecting unit WAM
Fault source Master WAM
Meaning The BTS is blocked with the BTS Site
Manager. The meaning of the fault is to
avoid alarms that may rise during a BTS
maintenance task.
Event type Start
Unit status Working
Effect The BTS does not send alarms to the
RNC when the BTS is blocked. Alarm
cancels are sent to the RNC.
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All cells are disabled.
Reported alarms 7650 BASE STATION FAULTY
Instructions To cancel the alarm, unblock the BTS.
Unblocking the BTS causes a site reset.
4.10 BTS config error (all units in a cell must be of same
freq)
Name BTS config error (all units in a cell must
be of same freq)
Triplemode
Detecting unit WAM
Fault source CELL
Meaning A unit with an incompatible frequency
type has been detected. All units in the
cell must be of the same frequency type.
Effect The capacity drops. Cell(s) may remain
down.
Reported alarms 7653 CELL FAULTY
LED display N/A
Instructions Check the unit frequency types in the cell
and replace the incompatible unit with a
compatible one.
4.11 BTS config error (different WTR variants cannot
coexist in cell)
Name BTS config error (different WTR variants
cannot coexist in cell)
Product
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Supreme; Optima; Optima IBBU; Optima
Triplemode
Detecting unit WAM
Fault source RX - WTR
Meaning There are different WTR variants in the
same cell.
Effect The conflicting WTR unit is marked as
faulty (not used by the Telecom), and the
cell coverage may therefore decrease.
For example, if the conflicting WTRA is
configured as the transmitter for the cell,
the cell may also be shut down.
Reported alarms 7654 CELL OPERATION DEGRADED
Instructions Replace the conflicting WTR unit with a
compatible unit.
4.12 BTS config error (incorrect carrier candidates)
Name BTS config error (incorrect carrier
candidates)
Detecting unit WAM
Fault source LCR
Meaning Carrier candidates are commissioned for
each cell (not WTR/LTX specific).
Event type Start
Effect The BTS cannot configure the TRX to a
channel that is not physically supported
by the WTR. The WTR or TRX is
inoperational.
LED display N/A
Instructions
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Recommission (Reconfiguration
commissioning) the BTS with the correct
carrier candidate values.
4.13 BTS config error (Not enough HW for LCR)
Name BTS config error (Not enough HW for
LCR)
Detecting unit WAM
Fault source LCR
Meaning A dual carrier WTR has been replaced
with a single carrier WTR, and it cannot
serve both cells commissioned to the
WTR.
Event type Start/Cancel
Effect The BTS capacity drops.
LED display N/A
Instructions Replace the single carrier WTR with a
dual carrier WTR.
4.14 BTS config error (WAF overload, 50W not in dual
WPA config)
Name BTS config error (WAF overload, 50W not
in dual WPA config)
Compact RF Extension
Detecting unit WAM
Fault source WPA
Meaning Two 50 W WPAs are coupled to one
WAF, or one 50 W WPA and one 28 W
WPA are coupled to one WAF. Only two
28 W WPAs can be coupled together to
one WAF unit.
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Effect The TX power is not turned on in the TX
chain. The BTS capacity drops. Cell(s)
may remain down.
Instructions Replace the 50 W WPAs with the 28 W
WPAs.
4.15 BTS config error (WPA / WSMA version conflict in
cell)
Name BTS config error (WPA / WSMA version
conflict in cell)
Triplemode
Detecting unit WAM
Fault source WPA
Meaning A WPAI/WPAJ with two carriers and a
WOC were detected in the combination
with a WSMA.
Effect The related cell is disabled.
Instructions Replace the WSMA with a WSMB. Or
replace the WPAI and WPAJ with a
WPAA/WPAB.
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4.16 BTS config error (WSMA and WSMB cannot
coexist)
Name BTS config error (WSMA and WSMB
cannot coexist)
Detecting unit WAM
Fault source WSMA
Meaning WSMA and WSMB units are detected in
the same cabinet. They cannot coexist in
the BTS.
Effect The BTS is out of order.
Instructions Replace the conflicting unit WSMA with
the WSMB, or vice versa.
4.17 BTS config error (WTR used as dual TRX behind
WSMA)
Name BTS config error (WTR used as dual TRX
behind WSMA)
Triplemode
Detecting unit WAM
Fault source WTRB, WTRD
Meaning A WTR/WSM conflict is detected. The
incompatible WTR cannot operate with
the WSMA when two TRXs are used.
Event type Start
Effect The cell capacity drops or the cell is
disabled.
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The WTR capacity in the subrack remains
unused.
The incompatible WTR unit remains
unconfigured.
Instructions Replace the incompatible unit or
recommission the BTS (Reconfiguration
Commissioning) with only one TRX on.
4.18 BTS file error
Name BTS file error
Detecting unit WAM
Fault source WAM
Meaning The BTS unit properties data is invalid or
missing.
Event type Start
Effect The BTS does not operate.
Reported alarms 7650 BASE STATION FAULTY (master
WAM)
DEGRADED (slave WAM)
7653 CELL FAULTY (WTR or WPA with
no redundant unit in a cell)
(WTR or WPA with a redundant unit in a
cell)
Instructions 1. Download the SW again.
2. If the fault still exists after 10 minutes,
replace the alarming unit.
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4.19 BTS RNC interface signalling link failure
Name BTS RNC interface signalling link failure
Detecting unit WAM
Fault source WAM, (RNC)
Meaning A common or a dedicated Node-B
Application Protocol (NBAP) or an AAL2
signalling link failure. It can be caused
either by a broken WAM, the RNC, or a
transmission network problem. The most
common reason for this alarm is
frequently-breaking transmission.
Effect The telecom SW does not operate (on the
Telecom Master WAM) and therefore the
WAM is not operational. The RNC NBAP
starts link re-establishment procedures
and keeps on trying until it either
succeeds or the link is removed.
Signalling and calls through the related
cell(s) do not work.
The user data cannot be used in the
related cell(s), but the WAM can still work
as a Telecom Master WAM.
DEGRADED
Instructions 1. Check the other transmission elements'
active alarms (refer to the AXC Alarm
Manual).
2. Check the BTS and RNC transmission
settings.
3. Reset the AXC.
4. Change the WAM unit.
Note
BTS and AXC can be restarted remotely.
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4.20 Cabinet door open
Name Cabinet door open
MetroSite 50
Detecting unit WEA
Fault source WEA
Meaning The cabinet door is open or the cabinet
door sensor is faulty.
Unit status Working
Effect No direct effect on the BTS operation.
Note that the WHX fan does not stop
even when the door is open.
Reported alarms 7651 BASE STATION DEGRADED
(MetroSite, MetroSite 50)
(other products)
LED display N/A
Instructions 1. Ensure that the cabinet door(s) are
properly closed.
2. Check that the door switches function
correctly and that they have been
adjusted correctly.
4.21 Cell blocked
Name Cell blocked
Detecting unit WAM
Fault source WTR
Meaning The user has blocked the cell with the
BTS Site Manager.
Unit status Working
Effect
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The BTS does not send to the RNC any
alarms related to the blocked cell or the
units commissioned to the blocked cell.
Alarm sending to the BTS Site Manager
is always enabled. Alarm cancels are
always sent to the RNC.
Calls through the blocked cell are
transferred to another cell. It is not
possible to establish new calls through
the blocked cell.
Instructions To cancel the alarm, unblock the cell.
4.22 Cell block rejected by RNC
Name Cell block rejected by RNC
Detecting unit WAM
Fault source LCR
Meaning The cell has been disabled due to BTS
internal reasons, for example if the RNC
has rejected the normal cell blocking
during the Intelligent Shutdown.
Unit status Working
Effect The cell is disabled.
LED display N/A
Instructions 1. Check the other active alarms.
2. Check the mains power supply.
4.23 Cell calibration failure
Name Cell calibration failure
Product
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Detecting unit WAM
Fault source WTR
Meaning TX power calibration failure: a CPICH
setup failure, a CPICH release failure or a
general initial calibration failure.
Event type Start
Effect If the initial calibration fails, the cell is
faulty.
Instructions 1. Check the commissioning (LCR
cablings).
2. Block/unblock the alarming unit or the
WPA connected to the alarming WTR.
The unit needs to be blocked/
unblocked to get initialized/configured
again if there was an internal failure.
3. Start a looptest with BTS Manager to
check WSM cablings.
4. Check the RF and WSM cablings.
5. Replace the alarming unit.
4.24 Cell power monitoring
Name Cell power monitoring
Detecting unit WAM
Fault source WPA
Meaning The WPA/Radio output power has
dropped. There is a fault in the downlink
transmission path.
Event type Start
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Instructions 1. Block/unblock the WPA. The unit needs
to be blocked/unblocked to get it
initialised/configured again if there was
an internal failure.
2. Block/unblock the WTR belonging to
the same LCR.
3. Check the RF TX cabling.
4. The fault may be in the WTR or WPA
(refer to the document WCDMA BTS
4.25 Cell power parameter out of range
Name Cell power parameter out of range
Detecting unit WAM
Fault source LCR
Meaning The power values in the cell configuration
data sent by the RNC are out of range.
Effect In a cell set-up, the cell is set inactive
until valid cell configuration data has been
received. In a cell reconfiguration, the cell
continues operating with the previous
configuration data.
Reported alarms 7655 CELL NOTIFICATION
LED display N/A
Instructions Set the correct power values to the RNC.
4.26 Commissioning parameter mismatch
Name Commissioning parameter mismatch
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Detecting unit WAM
Fault source WAM
Meaning A commissioning parameter does not
have a valid value (the parameter is
missing or it has a value outside the
value range) or there are errors in the
commissioning file.
Event type Start
Effect The BTS capacity may decrease or there
may be interference in calls.
DEGRADED
Instructions Reconfigure the BTS with Commissioning
Wizard.
4.27 Communication failure inside WSP
Name Communication failure inside WSP
Detecting unit WSP
Fault source WSP
Meaning An internal communication failure
between the DSP processors.
Effect The BTS capacity possibly decreases.
The Digital Signal Processing (DSP) does
not work correctly.
Reported alarms 7650 BASE STATION FAULTY (all WSPs
are faulty)
DEGARDED (at least one working WSP)
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Instructions 1. Block/unblock the alarming WSP.
2. The fault may be in the WTR or WPA
(refer to the document WCDMA BTS
Also check for other alarms. If the “Unit
autonomous reset as a recovery action”
alarm has occurred for the alarming
WSP, replace the alarming WSP unit.
4.28 Step change of oven oscillator control over 10% of
control range
Name Step change of oven oscillator control
over 10% of control range
Detecting unit WAM
Fault source WSC/WMC
Meaning The reference frequency that the BTS
master clock receives from the transport
part has changed by about 0.2 ppm or
more (which equals the change
magnitude of 204 DAC steps or more)
during the measurement period (about 20
minutes), compared to the BTS master
clock frequency.
The cause of the alarm can be:
1. The Iub reference frequency has
changed due to a fault in the
transmission network synchronisation
(which in turn is caused by an
equipment fault or a setting error). Note
that if the network synchronisation
malfunction lasts a long time, the alarm
is cancelled when the BTS frequency
reaches the faulty Iub synchronisation.
The alarm can also be activated if the
faulty Iub synchronisation is corrected
and there is again the difference of 0.2
ppm or more. The alarm is cancelled
whenever the difference becomes
smaller than 0.2 ppm.
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2. The Iub reference frequency fluctuates
continuously due to a great deal of jitter/
wander in the transmission network.
The alarm is continuously activated/
cancelled (however, the alarming state
may predominate). There is always
some jitter/wander in the transmission
network; the limits are defined in ITU-T
G.823/824/825.
3. If the BTS integrated transport part
receives the synchronisation
information via the 2.048 MHz
synchronisation input (external clock
source), the alarm situation may be
caused by a fault of that signal. In that
case, the alarm behaviour notifications
listed with the Iub signal (see above)
are also valid in this case.
4. There is an equipment fault in the BTS.
The equipment fault is, however, not
the most common reason. Normally the
reason can be found in the Iub/
reference signal behaviour (see the
descriptions above).
Note that if the alarm 7651 BASE
STATION OPERATION DEGRADED:
'WSC oven oscillator fault' becomes
active, it may cause the alarm 7652
BASE STATION NOTIFICATION:
'Difference between BTS master clock
and reference frequency' to cancel.
Effect This fault does not immediately affect the
operations of the BTS, but it is a
notification that the BTS frequency
deviates from the Iub reference. The BTS
master clock tuning continues in spite of
the alarm, but because the BTS master
clock adjustment is quite slow in order to
filter the instabilities of the Iub interface, it
takes some time (even several hours)
before the BTS operations start to be
affected.
LED display Blinking red (WSC/WMC)
Instructions Because there are several possibilities for
the alarm activation, a BTS Clock
Frequency History feature has been
developed. The stored history data can
be accessed via the BTS Site Manager.
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The history data can be used as a tool for
finding out the reason for the fault/alarm
situation (for further instructions about the
history feature, see the online Help of the
BTS Site Manager). Depending on the
possible reason, follow the instructions
below:
1. In case of fault in the transmission
network synchronisation, the network
synchronisation must be corrected. The
long-term accuracy of the Iub signal
must be 0.015 ppm or better (check the
correct Iub accuracy by measuring it).
No actions on the BTS are necessarily
needed.
2. If the basic accuracy of the Iub signal is
in order but there is too much instability,
that is, the jitter/wander is outside the
acceptable limits, the synchronisation
of the transmission network must be
corrected. The limits for the jitter/
wander are defined in the ITU-T G.823/
824/825. No actions on the BTS are
needed.
3. In case of BTS equipment fault, the
location may be:
a. Transport part
. First check the alarms of the
AXC node with the AXC
Manager and act accordingly.
. If there are no alarms, check the
AXC synchronisation settings.
b. WSC unit
. If both the Iub reference signal
accuracy and the AXC node are
in order but the WSC unit is still
alarming, run the fast tuning with
the BTS Site Manager.
.
If the alarm is still active after the
fast tuning is finished, reset the
site.
. If that does not help, replace the
WSC unit.
Note that if the reason is in the
transmission network
synchronisation, replacing the
WSC unit does not correct the
situation. Furthermore, the
alarm activity (frequent alarms/
cancels) points to instability in
the transmission network, not to
a fault in the unit.
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4. After the fault situation has been
cleared, the BTS master clock may also
require tuning because the BTS master
clock adjustment is quite slow. The
tuning may be done:
.
manually by changing the DAC
word (during a site visit)
. or with fast tuning, in which the BTS
master clock is tuned in a few
minutes automatically near the Iub
reference (normal tuning takes care
of the fine tuning). Note, however,
that the fast tuning should only be
used in case the Iub reference
signal is known as a good one.
Otherwise the BTS frequency may
be tuned into a totally incorrect
value, causing serious problems in
the network performance.
Background information:
The principle is that in the mobile
network, the synchronisation goes from
MSC => RNC => BTS. But in reality that
chain might be broken somewhere and,
for example, when using leased lines, the
BTS may take the reference
synchronisation from the transmission
network of another operator. This does
not harm the system if the
synchronisation of the leased line service
provider is also accurate/stabile enough.
The BTS uses the incoming
synchronisation signal as a reference for
the Air interface, the accuracy
requirement of which is set by 3GPP.
4.29 Diversity branch masthead amplifier fault
Name Diversity branch masthead amplifier fault
Detecting unit WAF
Fault source (WAF), MHA
Meaning The operating voltage of the Mast Head
Amplifier (MHA) is supplied through the
Bias-T from the WAF. The WAF monitors
the consumption of the current and
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generates an alarm if it deviates from the
normal consumption. The cable between
the MHA and WAF is faulty, the Bias-T is
faulty, the MHA is faulty or the MHA does
not exist.
Event type Start
Effect If the MHA is faulty, the RX performance
is degraded. The size of the cell may be
reduced.
LED display Alternating red and green
Instructions 1. Check the MHA commissioning
parameters.
2. Block/unblock the WAF in belonging
LCR.
3. Check the RF cabling and Bias-T.
4. The fault can be in WAF, Bias-T or
MHA. Refer to the document WCDMA
BTS Troubleshooting Instructions.
4.30 DSC-bus failure
Name DSC-bus failure
Detecting unit WAM
Fault source WAM, WSP
Meaning There is a failure in the bus between the
WAM and WSP (DSC bus), which means
that messages do not get through via that
DSC bus.
Event type Start
Unit status Out of order; Degraded
Effect If the source of the fault is at the WSP
end of the bus, the DSP capacity
decreases. If the source of the fault is at
the WAM end of the bus, it is possible
that calls will not get through at all.
DEGRADED
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LED display Blinking red (WAM), Stable red (WSP)
Instructions 1. Block/unblock the alarming unit.
4.31 DSP failure in radiolink creation
Name DSP failure in radiolink creation
Detecting unit WAM
Fault source WSP
Meaning Radiolink creation has failed repeatedly
due to DSP rejection or no response from
the DSP CPU.
Event type Start
Effect The BTS capacity may decrease.
DEGRADED
4.32 Error in commissioning data
Name Error in commissioning data
Detecting unit WAM
Fault source WTR
Meaning The WTR initialisation parameters are
faulty. The error can be caused by a
missing parameter in the commissioning
file: the cabling information (main,
diversity), feeder loss, local cell
resources, for example.
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Event type Start
Unit status Working
Effect The WTR is initialised with the default
values.
The BTS capacity may decrease or there
may be interference in calls.
DEGRADED
Instructions 1. Check that the cell parameters, RX
cabling, feeder loss and MHA gain are
correct in the commissioning file.
2. Update the information if needed.
Reconfiguration commissioning is
required for correcting the values.
4.33 Error in file server during SW download
Name Error in file server during SW download
Detecting unit WAM
Fault source WAM
Meaning The BTS is unable to obtain a file from
the file server (error in FTP open or FTP
get). The file server is down, the file is
missing, or the path is incorrect. A
possible error in the DCN and Iub, or a
user administration error (invalid
username or password, or the user does
not have access rights for the files).
Effect The BTS continues its operation with the
old software.
Instructions 1. Try to repeat the SW download a few
times.
2. Check the FTP account user settings.
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3. Check the file and path names.
4. Check the administration log on the file
server.
4.34 Failure in AXU initialization
Name Failure in AXU initialization
Detecting unit WAM
Fault source WAM
Meaning The BTS has lost connection to the AXU
or the AXU SW is incompatible. The AXU
does not respond to requests from the
BTS.
Effect The RNC connection and the remote BTS
Site Manager connection will not work.
The CNBAP will stay down. The BTS is
not operational.
DEGRADED
Instructions 1. Check the AXC configuration.
2. Reset AXC unit remotely. This will also
cause a BTS restart.
4.35 Cooling fan speed has reduced from the set speed
Name Cooling fan speed has reduced from the
set speed
Detecting unit UltraSite, MetroSite, MetroSite 50, Triple-
mode: WAM
Fault source Supreme: WFA, WPA and WHX fans
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Optima family: WFA, WPA and WHX fans
Triple-mode: WFA, WMP/WTR and WHX
fans
MetroSite, MetroSite 50: WFA fans
Meaning A fan does not rotate or rotates slower
than at the requested speed, or the RPM
info is not available for the fan.
Effect If the redundant fans cannot cool the
cabinet sufficiently, a unit overheating
may occur. For example, a temperature
alarm from the WPA/WMP or WTR may
be generated.
Instructions 1. Check the fan ID from the alarm text
and locate the problematic fan. See the
Fan mapping figures.
2. Check the fan and cabling.
3. If that does not help, replace the WFA,
WFD or MFU module or the fan
controlled by the WFA, WFD or MFU.
Fan control: 'FAN UNIT' refers to a
group of fans including the fan control
unit. A 'fan' is a single blower.
4.36 Fatal alarm
Name Fatal alarm
Detecting unit WAM
Fault source WOU
Meaning ARIO has detected a Fatal level alarm.
Some ARIO alarms can be cancelled
without reset, but most ARIO alarms
require a WOU block/unblock to cancel.
Effect The related cell is faulty.
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Instructions Check the WOU or WRUs. Use the ARIO
Local Management Tool and Nokia
Advanced Indoor Radio user
documentation to diagnose the error
cause.
4.37 Fault between WAM and WSP SFN (WSP)
Name Fault between WAM and WSP SFN
(WSP)
Detecting unit WSP
Fault source WSP, (WAM)
Meaning Synchronisation between the WAM and
WSP is lost.
Event type Start
The Digital Signal Processing (DSP) does
not work correctly.
Reported alarms 7650 BASE STATION FAULTY (all WSPs
are faulty)
DEGARDED (at least one working WSP)
Instructions 1. If only one WSP in the cabinet
generates this alarm, the WSP is faulty.
2. If all WSPs in a subrack generate this
alarm, the WAM is faulty.
3. If all WSPs generate this alarm, the
WSC/WMC is faulty.
Otherwise, check for other alarms. If
the "Unit autonomous reset as a
recovery action" alarm has occurred for
the alarming WSP, replace the alarming
WSP unit.
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4.38 Fault in ATM interface
Name Fault in ATM interface
Detecting unit WAM
Fault source WAM
Meaning WAM ATM interface, AXC or CIF bus
failure. The AXC may have been reset.
A WAM processor failure.
Event type Start
Effect Communication to other WAMs is not
functioning.
The BTS capacity decreases. The BTS is
faulty if the BTS configuration has only
one WAM or all WSPs are under the
faulty WAM.
Reported alarms 7650 BASE STATION FAULTY (without
slave WAM recovery)
DEGRADED (several WAMs with WSPs)
Instructions 1. Block/unblock the faulty unit (this will
reset the BTS).
2. Swap the WAM units between subracks
and check if the alarm follows the unit.
Replace the faulty WAM unit.
3. Check the AXU.
4. Check the backplane connection
between the WAM and AXU.
4.39 Fault in OM and DSP SW interface
Name Fault in OM and DSP SW interface
Detecting unit WAM
Fault source WSPA, WSPC
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Meaning A communication failure between the
WAM and DSP.
Event type Start
Effect The Digital Signal Processing (DSP) does
not work correctly. The BTS capacity
possibly decreases.
DEGRADED
4.40 File corrupted in SW download
Name File corrupted in SW download
Detecting unit WAM
Fault source WAM
Meaning The SW being downloaded is corrupted
or incorrectly formed.
Unit status Working
Effect The BTS continues its operation with the
old software.
Instructions 1. Retry the SW update.
2. Fetch BTS log files and check the
download status from the BTS SWDL
report.
4.41 Flash operation failure
Name Flash operation failure
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Detecting unit WAM, WTR, WPA/WMP, WSPC
Fault source WAM, WTR, WPA/WMP, WSPC
Meaning The flash memory operation failure. If this
alarm appears continuously, the flash chip
may be broken.
Event type Start
Effect BTS memory operations are not stable,
for example the software download and
parameter updates.
DEGRADED (if unit is WAM, WSPC)
7654 CELL OPERATION DEGRADED (if
unit is WPA/WMP or WTR)
Instructions 1. Check the other active alarms. If the
ROM disk is corrupted, change the
alarming unit.
2. Block/unblock the faulty unit.
There are no recovery actions and due
to that the block/unblock can be tried
once. If that does not help, replace the
faulty unit.
4.42 Gain adjust alarm
Name Gain adjust alarm
Detecting unit WAM
Fault source WTR
Meaning The WTR cannot adjust the TX output
power.
Effect
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The WTR gain fluctuations cannot be
adjusted, which affects the cell output
power accuracy. The operation of the
related cell is degraded and there may be
disturbances or cutoffs in calls.
LED display Blinking red (WTR)
Instructions 1. Block/unblock the WTR. The unit needs
to be blocked/unblocked to get it
initialised/configured again if there was
an internal failure.
2. Check the WTR RF TX cabling.
3. If that does not help, replace the
alarming unit.
4.43 Incompatible SW version detected
Name Incompatible SW version detected
Detecting unit WAM
Fault source WAM, WTR, WPA/WMP
Meaning A new unit with an incompatible SW has
probably been inserted in the BTS.
Effect The resources provided by the unit
cannot be used.
DEGRADED (WAM (or undefined))
7653 CELL FAULTY (WPA/WMP or the
only WTR in the cell)
(WTR)
Instructions Update the compatible SW to the BTS
(check the SW versions to see the active
SW version, and update the active SW
version), unless it is automatically
updated by the NetAct.
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4.44 Wrong unit type
Name Wrong unit type
Product Supreme; Optima IBBU; Optima Compact
RF Extension; MetroSite 50
Detecting unit WAM
Fault source WSMA, (WTRA, WSPA), WMCM
MetroSite 50/WN3.0: WMCM12, WTRB
Meaning An unsupported unit (for example a
WSMA, WTRA, WSPA, WMCM or WTRB)
has been detected in the cabinet.
Event type Start
Effect The BTS is faulty or the capacity is
decreased.
Reported alarms 7650 BASE STATION FAULTY (WMC)
DEGRADED (WSP, MetroSite 50)
7653 CELL FAULTY (WSM, WTR)
Instructions Replace the unsupported unit with a unit
of the correct type.
4.45 Initial calibration not started because other cell not
cleared
Name Initial calibration not started because
other cell not cleared
Detecting unit WAM
Fault source WTR
Meaning
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There is a shared WPA/WMP in the
configuration (WPA serves two cells). The
first cell needs to be calibrated and
therefore the second active cell needs to
be cleared, but the clearing fails.
Effect The initial power level of the cell is
inaccurate. Continuous calibration is not
performed. The cell size may differ from
the planned coverage.
Instructions 1. Block/unblock the WPA/WMP unit
belonging to the same LCR as alarming
WTR. The unit needs to be blocked/
unblocked to get it initialized/configured
again if there was an internal failure.
2. Reset the site.
4.46 Invalid carrier in WTR
Name Invalid carrier in WTR
Detecting unit WAM
Fault source WTR
Meaning There was an attempt to set the WTR to
a channel not supported by the WTR (on
a different frequency band).
Effect The related cells are disabled.
Instructions 1. Make sure that correct carrier numbers
are in use in the RNC.
2. Commission the BTS with the correct
WCDMA carrier values for the WTR.
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4.47 Invalid frequency channel for the BTS HW
Name Invalid frequency channel for the BTS HW
Detecting unit WAM
Fault source WTR, WPA, WIC, WAF, WMP
Meaning The requested channel in the cell set-up
is not acceptable, that is, the frequency
band and/or the carrier spacing and/or the
number of carriers is/are not acceptable
for the BTS HW.
Event type Transient
Unit status Working
Instructions Check the RNC cell parameters against
the BTS HW configuration. The cell
frequency is out of the minimum/
maximum limit of the HW, or the number
of carriers for the HW type is exceeded,
or the carrier spacing limit is exceeded.
There are different type variations of the
HW that may have limitations in the
supported frequency range and
bandwidth.
4.48 LPA faulty
Name LPA faulty
Triplemode
Detecting unit WPA/WMP
Fault source WPA/WMP
Meaning The unit is broken, because the startup
self-test fails, the FPGA file downloading
from flash fails, or the synthesiser is
malfunctioning. This fault can only occur
in the self-test phase.
Event type Start
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Effect The unit does not operate. The related
cell becomes faulty.
Instructions 1. Block/unblock the WPA/WMP.
2. Replace the alarming WPA/WMP.
4.49 LPA gain fault
Name LPA gain fault
Meaning A malfunction in some part of the
amplifier, which therefore cannot perform
the specified gain.
2. Replace the alarming WPA/WMP.
4.50 LPA input signal level is too high
Name LPA input signal level is too high
Detecting unit WPA/WMP, WOU
Fault source WPA/WMP, (WTR), WOU
Meaning
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The input signal level from the WTR is
critically high. The LPA gain is too low.
Event type Start
Effect There is no RF output from the WPA/
WMP, WOU. The related cell becomes
faulty.
Instructions 1. Block/unblock the WTR and WPA/WMP
or WOU.
2. Check PTx Target value with NEMU
and HSDPA power parameters (refer to
the Technical Note
TN_3GBTS_SW_2006_0035).
3. Replace the faulty unit.
4.51 LPA linearization fault
Name LPA linearization fault
Meaning The quality of the output signal is poor, or
the synthesizers are not locked.
Event type Start
WMP. The related cell becomes faulty.
2. Check RF TX cabling (refer to the
document WCDMA BTS
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4.52 LPA power supply alarm
Name LPA power supply alarm
Triplemode
Fault source WPA/WMP, WOU
Meaning The internal power supply of the unit is
malfunctioning.
Event type Start
Effect There is no RF signal at the WPA/WMP
or WOU output. The related cell becomes
faulty.
Instructions 1. Block/unblock the WPA/WMP, WOU.
2. Check the power supply and WPA
cablings and connectors from the
backplane (refer to the document
Instructions.
4.53 LPA reflected power too high
Name LPA reflected power too high
Fault source WPA/WMP, WAF, (cable)
Meaning A serious increase in the output
impedance. A cable may be broken or a
cable connection may be faulty.
Event type Start
WMP. The related cells are disabled.
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Instructions 1. Block/unblock the WPA.
2. Check the RF cabling between the
WPA and WAF.
3. Check the WOC (in the redundant
configuration) installation in
accordance with the installation
instructions (that is, check that cable
lengths and codes are right between
WTR, WIC and WPA).
4. Check the WAF, the antenna cabling
and cables.
5. Replace the WPA.
4.54 LPA temperature is dangerously high
Name LPA temperature is dangerously high
Fault source WPA/WMP, WOU
Meaning The temperature of the unit is critical. It
has reached its maximum acceptable
level.
It is also possible that the temperature
sensor is broken.
Event type Start
Effect There is no output from the WPA/WMP or
WOU. The related cell becomes faulty.
Instructions 1. Check the other active alarms related to
temperature or cooling fan.
2. Block/unblock WPA if no other alarming
unit is present.
If block/unblock does not help, replace
the alarming unit.
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4.55 Main branch masthead amplifier fault
Name Main branch masthead amplifier fault
Detecting unit WAF
Fault source (WAF), MHA
Meaning The operating voltage of the MHA is
supplied through the Bias-T from the
WAF. The WAF monitors the consumption
of the current and generates an alarm if it
deviates from the normal consumption.
The cable between the MHA and WAF is
faulty, the Bias-T is faulty, the MHA is
faulty, or the MHA does not exist.
Event type Start
Effect If the MHA is faulty, the RX performance
is degraded. The size of the cell may be
reduced.
LED display Alternating red and green (WAF)
Instructions 1. Check the MHA commissioning
parameters.
2. Block/unblock the WAF in belonging
LCR.
3. Check the RF cabling and Bias-T.
4. The fault can be in WAF, Bias-T or
MHA. Refer to the document WCDMA
BTS Troubleshooting Instructions.
4.56 Mains power break, running battery backup
Name Mains power break, running battery
backup
MetroSite 50
Detecting unit WAM.
Fault source O&M master WAM
Meaning
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There is a fault in the mains power
supply. The BTS has received a Battery
Backup alarm and the Intelligent
Shutdown procedure has been started.
Effect The battery backup unit is partly or
completely in use. The intelligent
shutdown operation is started. If the
mains power does not return, the cells are
shut down according to the predefined
parameters.
DEGRADED
Instructions Check the mains power supply.
4.57 Major alarm
Name Major alarm
Detecting unit WAM
Fault source WOU
Meaning ARIO has detected a Major level alarm.
Effect The functionality of the specific cell is
degraded.
cause.
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4.58 Minor alarm
Name Minor alarm
Detecting unit WAM
Fault source WOU
Meaning ARIO has detected a Minor level alarm.
Effect The functionality of the specific cell is
degraded.
cause.
4.59 Missing NBAP cell parameters, defaults are used
Name Missing NBAP cell parameters, defaults
are used
Detecting unit WAM
Fault source WAM
Meaning An alarm is generated if even one cell
parameter is missing from the RNC
configuration data and BTS
commissioning file.
Event type Start
Effect Default values are used for the cell. The
cell operation may become degraded.
Reported alarms
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DEGRADED
Instructions 1. If the parameters are configured to
Nokia RNC, delete and recreate BTS
Object in NEMU.
2. Reconfigure the BTS with
Commissioning Wizard, if the default
values for the cell parameters (such as
cell radius, rampdown time/step) are
not appropriate.
4.60 No connection to AXU
Name No connection to AXU
Detecting unit WAM
Fault source AXU
Meaning The master WAM detected that the AXU
does not respond to polling messages.
Effect Links to the RNC will not work and calls
are not possible.
Note
The recovery time between AXC and WAM
is 15 minutes, and the O&M connection
does not work then.
The site is reset after the alarm is
cancelled.
Instructions 1. Check for alarms on the AXC.
2. Restart the AXC remotely. This will also
cause a BTS restart.
3. Replace the alarming AXC unit.
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4.61 No connection to unit
Name No connection to unit
Detecting unit WAM
Fault source WAM, WSC, WTR, WPA, WSP, WAF,
WSM, WMC, WMP, WIB, WPS, WHX,
WCI, WIC, WID, IFU, AXU, MHA, WEA,
WFA, WOU, WFD, WCC
Meaning The connection to a unit that belongs to
the BTS configuration has been lost.
Effect If the WSC is lost, the redundant WSC is
brought into use automatically.
Depending on whether the WAM is the
cabinet master, subrack primary or
secondary WAM, the cell(s) or cell group
(s) are lost or their capacity decreases, or
the whole BTS is faulty.
If the alarm source is the WMC or WCI,
the BTS is faulty.
If the alarm source is the WTR, WAF,
WSM, WOU or WPA, the cell is blocked.
If the alarm source is the WIC, it may not
be possible to read WAF alarms.
Furthermore, additional 'No connection to
unit' alarms may be issued from other
units (WAM, WPA, WTR).
If a cancellation of the alarm 'No
connection to unit' of the WSM or primary
WAM is sent, a site reset occurs as a
recovery action.
This alarm cancels all active alarms for
the same unit.
Reported alarms 7650 BASE STATION FAULTY (O&M
master WAM, no redundant WSC, WMC,
WCI)
DEGRADED (WAM, WSP, WPS,
WPS_EXT, WPS_TR, WIC)
7652 BASE STATION NOTIFICATION (If
redundant WSC available, WID, BB_WFA,
TR_WFA, WFA WHX, WIB)
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7653 CELL FAULTY (TX/RX-WTR or
WAF (all TX/RX WAFs in cell are broken),
WSM_TR, WSM, WPA/WMP/WOU (one
WPA/WMP in a cell))
(RX-WTR or WAF (a working TX/RX WAF
exists in a cell), WPA/WMP (other working
WPA/WMP in a cell)
Instructions 1. Check the alarm history, alarming unit
and subrack.
2. If SW updates have been done
recently, reload the SW.
3. If WAF or WIC is alarming, try re-
commissioning the site.
4. Check that the unit is properly
connected. If the unit LED does not
light up, the unit is faulty. The fault may
also be in the WPS unit or backplane.
5. Check the power cables and
connectors, and I2C bus cables.
Cancel alarms: Removing and inserting
the WIC, WSM or primary WAM causes a
site reset. If both WSCs are removed,
inserting the first removed WSC back into
the cabinet causes a site reset.
If the 7650 BASE STATION FAULTY
alarm is issued, reset the site. First try to
reset the site by the software. If that does
not help, replace the faulty unit.
4.62 No connection to WEA and unable to detect
External alarms
Name No connection to WEA and unable to
detect External alarms
Detecting unit WAM
Fault source WEA
Meaning The WEA unit is missing from the BTS or
it cannot be detected.
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Effect The external alarms will not be detected.
There are problems with reporting door
and smoke alarms, for example.
Instructions 1. Check the WEA and cabling.
alarming unit.
To check units behind a same bus, refer
to the document WCDMA BTS
Troubleshooting Instructions.
4.63 Non-fatal ATM traffic overload
Name Non-fatal ATM traffic overload
Detecting unit WAM
Fault source WAM
Meaning Traffic load is approaching the maximum
capacity. However, no data is discarded
yet.
Unit status Working
Effect Quality of service may be degraded.
Instructions Check that the ATM configurations in the
BTS, AXC and RNC match.
4.64 Not enough WAF resources in LCR
Name Not enough WAF resources in LCR
Product
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Detecting unit WAM
Fault source WTR
Meaning There are not enough WAF units in a cell.
Effect Some cells are inactive.
Instructions 1. Refer to sections No connection to
WAF alarms and No connection to unit
in the document WCDMA BTS
2. Increase the number of WAF units in
the BTS.
MetroSite 50: Change the WAF.
4.65 Not enough WSP resources per cell
Name Not enough WSP resources per cell
Detecting unit WAM
Fault source Master WAM
Meaning The number of WSP units in the BTS is
too small. For every three cells, there
must be at least one WSP present.
Unit status Working
Effect The BTS capacity drops, cell(s) may be
inactive.
DEGRADED
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Instructions 1. Check possible WSP, WSM and WAM
alarms. If Base Band pooling is in use,
check LCG (Local Cell Group)
commissioning. Check that all subracks
are in working state.
2. Increase the number of WSP units in
the BTS.
4.66 No WSM resources
Name No WSM resources
Product Optima IBBU; Optima Compact RF
Extension
Detecting unit WAM
Fault source WSM
Meaning There should be two WSM units in the
subrack 1. The WSM2 must always be
connected when the WSM1 is used. If
there is no connection to the WSM2, this
fault is generated for the WSM1.
Event type Start
Instructions Insert the WSM2.
4.67 Oven oscillator clock missing
Name Oven oscillator clock missing
Detecting unit WSC/WMC
Meaning The WSC cannot deliver the clock signals
required by the other units.
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Effect If there is only one clock in the cabinet,
the BTS is not operational.
UltraSite: If there is an operating WSC in
the BTS, the redundant clock is brought
into operation in case the active clock
generates an alarm.
Reported alarms 7650 BASE STATION FAULTY (No
redundant WSC)
(redundant WSC available)
LED display Stable red (WSC/WMC )
Instructions Replace the clock unit.
4.68 Oven oscillator heating failure
Name Oven oscillator heating failure
Meaning The heating of oven oscillator fails and
the unit is broken. The ambient
temperature can also be too low or
change too fast.
the BTS can function properly for a few
days without an external reference, but
the network performance may start to
decrease gradually.
generates an alarm.
Reported alarms 7651 BASE STATION DEGRADED (no
redundant WSC)
(redundant WSC available)
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LED display Blinking red (WSC/WMC)
Instructions 1. Check the active fan alarms.
2. Replace the clock unit.
4.69 POST test failed
Name POST test failed
Detecting unit WAM
Fault source WSP
Meaning The unit or module has been tested
during the BTS power-on self test (POST)
and a failure has been detected.
Event type Start
Effect The faulty WSP is not configured, so the
BTS capacity decreases.
DEGRADED
2. Remove/reinsert the alarming unit.
4.70 Power unit input voltage fault
Name Power unit input voltage fault
Detecting unit WPS
Fault source WPS (AC/DC line)
Meaning The input voltage of the BTS has
decreased.
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Effect If the voltage continues to decrease, the
BTS stops functioning.
DEGRADED
LED display Stable red (WPS)
Instructions 1. Check the other MAINS related active
alarms.
2. Check the power supply voltage. If it is
OK, replace the power cable.
3. Check the power unit.
4.71 Power unit output voltage fault
Name Power unit output voltage fault
Detecting unit WPS
Fault source WPS
Meaning The output voltage is too low or too high.
Usually the reason for the fault is the unit
itself, but in some cases the reason can
be the unit that the WPS feeds.
If a short circuit occurs in the fed unit, it
may affect the WPS and the "Output
Voltage Fault" alarm is generated.
Effect The subrack and cell under the WPS unit
may become degraded or faulty.
A single faulty power unit will not
adversely affect the operation of other
power units in the system.
Reported alarms 7650 BASE STATION FAULTY (when this
fault is active for all WPS units)
DEGRADED (single WPS)
LED display Stable red (WPS)
Instructions 1. Check the other active alarms.
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2. Check the units that are supplied by the
alarming WPS.
3. Check the backplane connectors and
cables.
4. Replace the alarming WPS unit.
4.72 R-bus error
Name R-bus error
Detecting unit WSP
Fault source WTR
Meaning The bus between the WSP and WTR
does not work. The R bus errors are
probably caused by a faulty WSM or
WTR.
Calls in the affected cell may not be
possible.
DEGRADED (WSP)
7653 CELL FAULTY (WTR/TRX)
(WTR/TRX)
Instructions 1. If the WSM/WMC also generates an
alarm from a WTR unit, check the WTR
and WSM cable.
2. If there are no active WSM/WMC
alarms, the reason for the alarm is a
faulty WSM/WMC or WSP.
3. Run a WCDMA BTS loop test to locate
the faulty unit.
4. If the WSP is faulty, block/unblock it.
5. Replace the faulty unit.
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4.73 ROM disk corrupted during SW update
Name ROM disk corrupted during SW update
Detecting unit WAM, WTR, WMP, Nokia WPA
Fault source WAM, WTR, WMP, Nokia WPA
Meaning The file storing to flash fails because of a
corrupted file system.
Event type Start
Unit status Working
Effect The SW update does not work.
Instructions Replace the alarming unit.
4.74 SFN synchronization failure
Name SFN synchronization failure
Detecting unit WAM
Fault source WSPC
Meaning The WSP is not synchronised with the
WAM.
Event type Start
Effect The BTS capacity decreases and calls
may be dropped.
DEGRADED
alarming unit.
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Triplemode
Detecting unit WAM
Fault source WAM
Meaning WAM internal synchronisation failure.
Event type Start
Effect The BTS capacity decreases, some cells
may become disabled.
DEGRADED
Instructions 1. Check and correct the ATM
configuration.
2. Replace the WAM.
Triplemode
Detecting unit WAM
Fault source Slave WAM
Meaning The slave WAM is not synchronised with
the master WAM.
Event type Start
Effect The BTS capacity decreases, some cell
(s) may become faulty.
DEGRADED
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alarming unit.
4.77 Smoke alarm
Name Smoke alarm
RF Extension
Detecting unit WEA
Fault source WEA
Meaning The internal smoke detector has detected
smoke in the cabinet.
Unit status Working
Effect None
LED display N/A
Instructions 1. Check the root cause.
2. If the alarm was false, replace the
alarming smoke detector.
4.78 SW does not support commissioning file
Name SW does not support commissioning file
Detecting unit WAM
Fault source WAM
Meaning The software does not support the new
commissioning file loaded to the BTS.
Event type Start
Effect The BTS is not commissioned or
operational.
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Instructions 1. Check and correct the contents of the
commissioning file. Load the correct
commissioning file to the BTS.
2. Update the BTS software.
4.79 System frame clock signal missing
Name System frame clock signal missing
Detecting unit WAM
Fault source WAM, WCI
Meaning The WAM does not receive a system
frame clock (SFCLK) from the WCI/WMC,
because of the transceiver circuit in the
WCI, the receiver circuit in the WAM, or
the system frame clock bus is faulty.
Event type Start
Effect Calls via the faulty sector(s) are not
possible.
DEGRADED
LED display Blinking red (WAM)
Instructions 1. Block/unblock the alarming unit (WAM).
This ensures that nothing unexpected
has happened in the unit start-up
phase.
alarming unit (WAM).
4.80 T-bus error
Name T-bus error
Product MetroSite
Detecting unit WMC
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Fault source WSP
Meaning The WMC has detected parity or
synchronisation errors in the TX samples
of the incoming T-bus from the WSP unit.
Unit status Working
Effect The capacity drops.
The WTR and WSP capacity in the
subrack remains unused.
Instructions 1. Check the WSP in the same subrack.
2. Check the alarm history. If the alarm
occurs frequently, replace the WMC or
WSP.
4.81 Telecom cell enabling or disabling failed
Name Telecom cell enabling or disabling failed
Detecting unit WAM
Fault source LCR
Meaning The cell enabling (the set-up of CPICH
and BCH) failed, or the cell disabling (the
release of common channels) failed. The
reason could be a hardware or a bus
problem, or a lack of DSP or ATM
resources.
Unit status Working
Effect The affected cell state remains
unchanged.
LED display N/A
Instructions 1. Check the other active alarms if WSP
capacity has been decreased.
2. Check if there are enough WSP units.
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4.82 Telecom configuration failure
Name Telecom configuration failure
Detecting unit WAM
Fault source WAM, WSP, WTR, WPA/WMP
Meaning A Telecom slave configurations or
registrations failure. A unit RNW
configuration failure. A Telecom RNW
reconfiguration failure. Or a WSP unit to
WAM allocation failure.
Event type Start
Effect The affected WAM unit is not operational.
In case of a WSP fault, the channel
capacity is lost and cell(s) may become
unavailable. In case of a WTR or WPA/
WMP, the associated cell(s) become
faulty.
DEGRADED (if unit is WAM, WSP)
7653 CELL FAULTY (TX/RX-WTR, WPA/
WMP with no redundancy)
(RX-WTR or WPA/WMP with redundancy)
Instructions 1. Block/unblock the alarming unit. The
unit needs to be blocked/unblocked to
get it initialised/configured again if there
was an internal failure.
4.83 Timeout, commissioned resource not ready
Name Timeout, commissioned resource not
ready
MetroSite 50
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Detecting unit WAM
Fault source WAM, WPA, WTR, WSM
Meaning The faulty unit has not been configured or
initialised.
Event type Start
DEGRADED (WAM)
7653 CELL FAULTY (WPA, TX WTR/
TRX)
(RX WTR/TRX)
Instructions Recommission the site.
4.84 Too many carriers allocated for LPA
Name Too many carriers allocated for LPA
Product Supreme; Optima;Optima IBBU; Optima
Detecting unit WAM
Meaning Too many carriers have been allocated to
the WPA/WMP.
Event type Start
Effect The WPA/WMP remains unconfigured.
The affected cell stays inactive.
Instructions Remove the additional carrier in the
Reconfiguration commissioning.
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4.85 Traffic flow in a non-existent ATM connection
Name Traffic flow in a non-existent ATM
connection
Detecting unit WAM
Fault source WAM, (AXC)
Meaning Traffic flow in a non-existent ATM
connection, for example due to an
incorrect configuration.
Effect The BTS capacity may be decreased.
DEGRADED
Instructions 1. Check and correct the ATM
configuration in the BTS, AXC and
RNC.
4.86 Transmission clock missing
Name Transmission clock missing
Compact RF Extension; Triplemode
Detecting unit WCI
Fault source WCI, (AXU, IFU)
Meaning The clock of the BTS, the WSC/WMC
unit, uses the Iub or the signal received
from an external clock as a clock
reference. The signal is routed through
the AXC and WCI to the WSC. This alarm
is generated if the WCI does not receive
the clock reference signal.
Unit status Working
Effect Tuning does not follow the external
reference.
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The BTS continues its operation with its
own oven oscillator.
The BTS can function properly for a few
decrease gradually.
DEGRADED
Instructions 1. Check the other transmission-related
alarms, example: link breaks.
2. Check the AXC settings.
3. Check the transmission cabling.
4. Replace the WCI unit.
4.87 TX output power measurement fault
Name TX output power measurement fault
Detecting unit WAM
Fault source WTR, WPA/WMP/WOU
Meaning The WTR or WPA/WMP/WOU output
power measurement has failed.
Effect The gain control feature is lost and it may
generate interference to the network.
The NBAP common measurement
message is incorrect due to missing
measurement data from the WTR, WPA/
WMP/WOU or RF module.
Reported alarms 7653 CELL FAULTY (TX/RX-WTR, WPA/
WMP with no redundancy.)
(RX-WTR or WPA/WMP with
redundancy.)
Instructions
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1. Block/unblock the alarming unit. The
unit needs to be blocked/unblocked to
get it initialised/configured again if there
was an internal failure.
2. Check the units and the RF cabling
between the WPA/WMP/WOU and
WTR units (refer to the document
Instructions).
4.88 Unit autonomous reset as a recovery action
Name Unit autonomous reset as a recovery
action
Detecting unit WAM
Fault source WSP, WAM, WTR
Meaning There are problems in a unit. The BTS
tries to correct the situation by performing
a recovery reset to the faulty unit.
Unit status Working
Effect The faulty unit is reset.
Instructions Check the alarm history and other active
alarms of the unit.
Note
This alarm does not require any (special)
actions.
4.89 Unit blocked
Name Unit blocked
Product
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Detecting unit WAM
Fault source Supreme: slave WAM, WTR, WPA, WSP,
WAF, WSC
MetroSite: WTR, WMP, WSP, WAF
Optima: slave WAM, WTR, WPA, WSP,
WAF, WSC
Triple-mode: slave WAM, WTR, WMP,
WSP, WAF
MetroSite 50: WTR, WMP, WSP, WAF
ARIO: WOU
Meaning A unit is blocked with the BTS Site
Manager.
The purpose of the fault is to avoid
alarms that may rise during the unit
maintenance task.
Effect The BTS does not send alarms related to
the blocked unit to the RNC. Alarm
sending to the BTS Site Manager is
always enabled. The alarm cancels are
always sent to the RNC.
It is not possible to establish phone calls
through the blocked unit.
DEGRADED (WAM, WSP)
WAF (all TX/RX WAFs in a cell are
broken), WPA/WMP (one WPA/WMP in a
cell))
exists in a cell), WPA/WMP (other working
WPA/WMP in a cell))
Instructions To cancel the alarm, unblock the unit.
4.90 Unit has lost connection to temperature sensor
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Name Unit has lost connection to temperature
sensor
Detecting unit WAM
Fault source WAM, WSP, WPS, WSC/WMC, WPA/
WMP, WTR, WFA
Meaning The temperature sensor may be broken
or the temperature value from the
temperature sensor is unavailable,
unreliable or outside the defined limits.
Unit status Working
Effect Temperature control tries to stabilize the
temperature according to the correlated
temperature information from the adjacent
units.
4.91 Unit initialization failure
Name Unit initialization failure
Detecting unit WAM
Fault source WSP
Meaning Connection to the WSP fails due to a
WSP internal failure.
Event type Start
Effect The BTS capacity decreases, cell(s) may
remain down.
DEGRADED
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4.92 Unit initialization failure
Name Unit initialization failure
Detecting unit WAM
Fault source WSM, WSC/WMC, WAM, WTR, WSP,
WPA/WMP, (AXU)
Meaning A unit or an IP address initialisation has
failed.
Event type Start
Effect If the fault source is WSC/WMC, the BTS
is not operational. If the fault source is
AXU, connections to the RNC and BTS
are not working. If the fault source is
WAM, either the ATM or Telecom in that
unit is not working.
Reported alarms 7650 BASE STATION FAULTY (unit is
WSC (non redundant), WMC, master
WAM)
DEGRADED (WAM, WSM, WSP,
redundant WSC available)
7653 CELL FAULTY (TX/RX-WTR, WPA/
WMP)
(RX-WTR)
LED display Blinking red (WAM)
Stable red (other faulty units)
2. Check if the non-commissioned WAM
is Master WAM. If so, this causes the
alarm. Check the alarm history to know
why WAMs´ switchover occurred.
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3. If the WAM is the alarm source, check
the RNC IP address in the
commissioning file and modify the file if
needed. If that does not help, perform a
power-off reset.
4. If the previous step does not help,
replace the alarming unit.
4.93 Unit not supported by current BTS SW version
Name Unit not supported by current BTS SW
version
Detecting unit WAM
Fault source All possible units.
Meaning An unsupported unit was found in the
BTS. Typically this happens when a new
unit version is installed and there is an
older BTS SW in use that does not
support the new unit version.
Event type Start
Effect The BTS capacity decreases.
master WAM, no redundant WSC, WMC,
WCI)
DEGRADED (other WAM, WSP, WPS,
WPS_EXT, WPS_TR, WIC)
redundant WSC available, WID, BB_WFA,
TR_WFA, WFA WHX, WIB, WEA)
WAF (all TX/RX WAFs in the cell are
broken), WSM_TR, WSM, WPA/WMP
(one WPA/WMP in the cell))
exists in the cell), WPA/WMP (other
working WPA/WMP in the cell))
Instructions Replace the unit or upgrade the BTS SW.
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4.94 Unit SW download failed
Name Unit SW download failed
Detecting unit WAM
Fault source WAM (ATM SW), WSP (DSP SW), WSPC
(MCU SW), WPA (WPA SW)
Meaning The software update to the unit or subunit
has failed.
Event type Start
Effect If the ATM SW update to an O&M master
WAM fails or the ATM Post fails, the BTS
is not operational.
If the ATM SW update to slave WAMs
fails or the ATM Post fails, the subrack is
not operational. If the DSP SW or WSPC
(MCU SW) update fails, the BTS capacity
drops. If the WPA SW update fails, the
cell is faulty. If the optical interface FPGA
SW update fails, communication to radio
modules does not work and the BTS is
not operational.
DEGRADED (WAM or WSP)
7653 CELL FAULTY (WPA (one WPA in
the cell))
(WPA (other working WPA in the cell))
Instructions 1. Block/unblock the WSP.
2. If Step 1 does not help, replace the
alarming unit.
OR
Download the BTS SW again.
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4.95 Unit synchronization failed
Name Unit synchronization failed
Detecting unit WAM
Fault source WAM, WSPC
Meaning The WAM/WSPC synchronisation has
failed.
Event type Start
Some cells may become disabled.
master WAM)
DEGRADED (WSPC)
4.96 Unit temperature is high
Name Unit temperature is high
Detecting unit WAM
Fault source WAM, WSP, WPS, WSC/WMC
Meaning The temperature of a unit exceeds the
threshold value.
Unit status Working
Effect The operation of the BTS possibly
decreases.
Instructions
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Check the active fan alarms, and the
airflow of the BTS.
4.97 Unknown cabinet type
Name Unknown cabinet type
Detecting unit WAM
Fault source WAM
Meaning The cabinet cannot be identified by its
product code (or object ID). The problem
is probably in the WID id.
Event type Start
Effect The BTS starts up as a previously
detected cabinet type. If the previous
cabinet type cannot be determined, the
BTS starts up as a Supreme cabinet.
DEGRADED
Instructions 1. Check the WID connection and replace
WID.
4.98 Unknown HW resource
Name Unknown HW resource
RF Extension; MetroSite; Triplemode;
MetroSite 50
Detecting unit WAM
Fault source All possible units according to the unit id.
Meaning A unit cannot be identified by its product
code or by its physical device address
(object ID).
Event type Start
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DEGRADED (WAM, WSP, WPS, WIC,
WSC, WMC, WCI, WID, WFA, WHX,
WIB, WEA)
WAF (all TX/RX WAFs in cell are broken),
WSM, WPA/WMP (one WPA/WMP in
cell).)
exists in cell), WPA/WMP (other working
WPA/WMP in cell).)
4.99 [User defined]
Name [User defined]
MetroSite 50
Detecting unit WEA
Fault source WEA
Meaning High or low voltage on the external alarm
line.
The user specifies the fault text during
commissioning.
Unit status Working
Effect For example, with the intelligent
shutdown, the WPA/WMP and the local
cell resources are blocked to minimize the
power consumption. Therefore, the
battery backup can keep the AXU unit up
and running longer than the other BTS
units.
Reported alarms 7401 - 7424 (EAC1=7401, EAC2=7402
and so on)
LED display N/A
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Instructions [User defined]
4.100 WAF low noise amplifier faulty
Name WAF low noise amplifier faulty
Detecting unit WAF
Fault source WAF
Meaning One of the two RX preamplifiers (one in
the main branch and the other in the
diversity branch) is faulty. The LED
indicates the faulty unit.
MetroSite 50: One, some or all of the RX
preamplifiers (max 6) are faulty. The LED
indicates the faulty unit.
Event type Start
Effect There are up to six antennas in a cell and
if one of the antennas is functioning, the
cell is operational. However, the cell and
RX performance are degraded.
Reported alarms 7653 CELL FAULTY (UltraSite, MetroSite,
Triple-mode: both branches are faulty.
MetroSite 50: all branches are faulty)
(UltraSite, MetroSite, Triple-mode: single
branch. MetroSite 50: one or more
branches)
Instructions 1. Block/unblock the WAF unit. This is
most likely a HW fault, but blocking/
unblocking the unit ensures that before
a site visit.
2. If that does not help, replace the faulty
unit.
4.101 WAM SFN polling timeout
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Name WAM SFN polling timeout
Triplemode
Detecting unit WAM
Fault source Slave WAM
Meaning The slave WAM is not synchronised with
the master WAM.
Event type Start
Effect The BTS capacity decreases. Cells may
become faulty.
DEGRADED
Note
After a WAM bloc/unblock, the BTS will be
restarted.
alarming unit.
4.102 WCI baseband reference clock failure
Name WCI baseband reference clock failure
Detecting unit WCI
Fault source Master/Redundant WSC
Meaning The master or redundant WSC does not
generate Baseband Reference Clock
(BRCLK) to the WCI because of an
internal failure or a clock driver failure in
the WSC unit.
the BTS is not operational.
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generates an alarm.
Reported alarms 7650 BASE STATION FAULTY (if both
WSCs are faulty)
(else)
LED display N/A
Instructions 1. Block/unblock the active WSC unit.
3. Replace both WSC units.
4.103 WEA power regulator fault
Name WEA power regulator fault
Detecting unit WEA
Fault source WEA
Meaning The WEA unit external interface
connectors are connected incorrectly, or
there is a shot circuit in the +5 VCD.
Unit status Working
Effect The external connectors are not
functioning.
Instructions 1. Disconnect the external cables and
check whether the alarm disappears.
2. Check the external cables and
connection.
3. If the alarm does not disappear, check
the WEA and replace it if faulty.
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4.104 WIB unit AC line break fault
Name WIB unit AC line break fault
Product MetroSite
Detecting unit WIB
Fault source WIB, (AC Line)
Meaning There is a mains break. The BTS power
supply is cut off.
Unit status Working
Effect The WIB starts to supply voltage to the
WPSM and continues the power supply
for 10 s.
If the mains power does not recover
during the 10 seconds, the BTS will shut
down due to the lack of power.
Instructions Check the power supply to the BTS.
4.105 WIB unit battery failure
Name WIB unit battery failure
Product MetroSite
Detecting unit WIB
Fault source WIB
Meaning WIB unit battery failure:
. Several battery blocks (cells) are dead
and the back-up system is out of order.
.
Some of the battery blocks (cells)
reached an overcharge or a discharge
voltage in a stand-by condition.
.
The voltage of one cell is not
compatible with the other cell voltages.
Effect The WIB does not work at all, or it cannot
supply sufficient power to the WPS.
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Instructions 1. Check the battery cablings and cell
voltage levels.
2. Replace the WIB unit or battery.
4.106 WIB unit battery temperature out of range
Name WIB unit battery temperature out of range
Product MetroSite
Detecting unit WIB
Fault source WIB
Meaning Because the heater or heater control unit
does not work correctly, the temperature
measured inside the unit is out of normal
temperature range.
Unit status Working
Effect If the WIB is still used, the battery will run
out much sooner than expected.
LED display Blinking red (WIB)
Instructions 1. Check the temperature of the battery
space.
2. Check the battery temperature sensor.
4.107 WIB unit power back-up time alarm
Name WIB unit power back-up time alarm
Product MetroSite
Detecting unit WIB
Fault source WIB
Meaning The WIB cannot supply nominal power for
10 seconds and/or the estimated battery
life is 26 weeks or less.
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Effect If the WIB is still used, the battery runs
out as shown in the Remaining Battery
Life Indicator.
If the battery life has ended, the "WIB unit
battery failure" alarm is generated.
LED display Blinking red (WIB, battery life still left)
Stable red (WIB, no battery left)
Instructions Replace the WIB unit.
4.108 WMC oven oscillator fault
Name WMC oven oscillator fault
Product MetroSite
Detecting unit WAM
Fault source WMC
Meaning The oven oscillator adjusting area is
reaching its limit value. The alarm is
activated if the WMC tunes the oven
oscillator so that the DAC word
(parameter to control the oven oscillator
output frequency) value becomes lower
than 205 or greater than 3891 (5% of the
total adjustment area). The range for the
DAC word is 0 - 4095. The cause of the
alarm can be:
. The Iub reference frequency has been
incorrect for a long time (up to several
days) due to a fault in the transmission
network synchronisation (which in turn
is caused by an equipment fault or a
setting error).
Before activating this alarm, the alarm
7652 BASE STATION NOTIFICATION:
and reference frequency' may have
been active.
. If the BTS-integrated transport part
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caused by a fault in that signal. In that
case the alarm behaviour notifications
are also valid here.
. The fast tuning action of the BTS
master clock may have been executed
without checking if the reference signal
is correct or not. If the reference signal
is incorrect during the fast tuning
execution, it may result in adjusting the
BTS master clock frequency far from
the nominal value, which causes
serious problems in the network
performance.
. There is an equipment fault in the BTS.
.
Due to the oven oscillator (OCXO)
aging inside the WSC unit, the unit may
be approaching the end of its lifetime. In
such a case, after the alarm activation,
the DAC value is quite stable, while in
the other fault cases it may be very
unstable or at the edge of the
adjustment area (0 or 4095).
'WMC oven oscillator fault' becomes
Effect The severity of the fault depends on the
situation:
.
If the WMC unit (OCXO) is approaching
the end of its lifetime but the reference
frequency is still correct, the BTS and
system performance may be normal for
months or even one year after the
alarm activation (given that the DAC is
not at the edge of the adjustment area).
. The other faults may cause the BTS
and system performance to collapse
due to an incorrect air interface
frequency.
DEGRADED
Instructions Background information:
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The principle is that in a mobile network,
the synchronisation goes from MSC =>
RNC => BTS. But in reality, that chain
might be broken and, for example, when
using leased lines, the BTS may take the
reference synchronisation from the
transmission network of another operator.
This does not harm the system if the
provider is accurate or stable enough.
The BTS uses the incoming
synchronisation signal as a reference for
the Air interface, the accuracy
requirement of which is set by 3GPP.
must be 0.015 ppm or better.
location may be:
a. Transport part
- Check the alarms of the AXC node
with the AXC Manager and act
accordingly.
- If there are no alarms, check the
AXC synchronization.
b. WMC unit
- If both the Iub reference signal
accuracy and the AXC node are in
order but the WMC unit is still
alarming, run the fast tuning
procedure with the BTS Site
Manager.
- If there is no cure in a few minutes,
reset the site.
- If that does not help, replace the
WMC unit.
require tuning, because the BTS
master clock adjustment is quite slow.
The tuning may be done:
- Manually, by changing the DAC word
(during a site visit).
- With fast tuning, by which the BTS
master clock is tuned in a few minutes
automatically near the Iub reference
(normal tuning takes care of the fine
tuning).
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Note
The fast tuning should only be used in case
the Iub reference signal is known to be a
good one. Otherwise the BTS frequency
may be tuned into a totally incorrect value,
causing serious problems in the network
performance.
4.109 WPA power level changed
Name WPA power level changed
Triplemode
Detecting unit WAM
Fault source WPA
Meaning The power level of a replaced WPA unit
differs from the original WPA unit.
Effect The capacity drops. Cell(s) may remain
down.
Instructions If the WPA is accidentally changed to a
different power level type of WPA, replace
the WPA unit to the correct power level
type of WPA.
4.110 WSC oven oscillator fault
Name WSC oven oscillator fault
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Detecting unit WSC
Fault source WSC
Meaning The oven oscillator adjusting area is
reaching its limit value. The alarm is
activated if the WSC tunes the oven
oscillator so that the DAC word
(parameter to control the oven oscillator
output frequency) value becomes lower
than 205 or greater than 3891 (5% of the
total adjustment area). The range for the
DAC word is 0 - 4095. The cause of the
alarm can be:
.
The Iub reference frequency has been
incorrect for a long time (up to several
days) due to a fault in the transmission
network synchronisation (which in turn
is caused by an equipment fault or a
setting error). Before activating this
alarm, the alarm 7652 BASE STATION
NOTIFICATION: 'Difference between
BTS master clock and reference
frequency' may have been active.
.
If the BTS integrated transport part
caused by a fault in that signal. In that
case the alarm behaviour notifications
are also valid in this case.
. The fast tuning action of the BTS
master clock may have been executed
without checking if the reference signal
is correct or not. If the reference signal
is incorrect during the fast tuning
execution, it may result in adjusting the
BTS master clock frequency far from
the nominal value, which causes
performance.
. There is an equipment fault in the BTS.
.
Due to the oven oscillator (OCXO)
aging inside the WSC unit, the unit may
be approaching the end of its lifetime. In
such case, after the alarm activation,
the DAC value is quite stable, whereas
in the other fault cases it may be very
unstable or at the edge of the
adjustment area (0 or 4095).
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'WSC oven oscillator fault' becomes
Effect The severity of the fault depends on the
situation:
. If the WSC unit (OCXO) is approaching
the end of its lifetime but the reference
frequency is still correct, the BTS and
system performance may be normal for
months or even a year after the alarm
activation (if the DAC word is not at the
edge of the adjustment area).
. The other faults may cause the BTS
and system performance to collapse
due to incorrect air interface frequency.
DEGRADED (WMC or only one WSC)
LED display Stable red (WSC)
Instructions Background information:
The principle is that in a mobile network,
RNC => BTS. But in reality that chain
might be broken somewhere and, for
example, when using leased lines, the
not harm the system if also the
provider is accurate/stable enough. The
BTS uses the incoming synchronisation
signal as a reference for the Air interface,
the accuracy requirement of which is set
by 3GPP.
must be 0.015 ppm or better.
location may be:
a. Transport part
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.
First check the alarms of the
AXC node with the AXC
Manager and act accordingly.
.
If there are no alarms, check the
AXC synchronisation settings.
b. WSC unit
.
If both the Iub reference signal
accuracy and the AXC node are
in order but the WSC unit is still
alarming, run the fast tuning
procedure with the BTS Site
Manager.
.
If there is no cure in a few
minutes, reset the site.
. If that does not help, replace the
WSC unit.
Note: In case the BTS is
equipped with two WSCs, the
redundant unit takes over the
operation of the faulty unit. But if
the fault situation is caused by
an incorrect reference signal,
both the WSC units may start
alarming sooner or later.
require tuning, because the BTS
master clock adjustment is quite slow.
The tuning may be done:
. Manually, by changing the DAC
word (during a site visit).
.
Or with fast tuning, by which the
BTS master clock is tuned in a few
minutes automatically near the Iub
reference (normal tuning takes care
of the fine tuning).
Note, however, that the fast tuning
should only be used in case the Iub
reference signal is known to be a
good one. Otherwise the BTS
frequency may be tuned into a
totally incorrect value, causing
performance.
4.111 WSC phase difference jammed to zero reading
Name
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WSC phase difference jammed to zero
reading
Detecting unit WAM
Fault source WSC, WMC
Meaning The WSC phase measurement is jammed
and the tuning operation is degraded.
The problem can be caused by a WSC
fault or a too fast frequency change on
the Iub.
Effect The BTS master clock (OCXO) is in the
hold-over mode because it cannot use the
synchronisation reference information.
The BTS air interface stability is not
affected, but the accuracy starts to drift
slowly. It may take even several weeks
before the BTS/RAN operations start to
be affected.
DEGRADED (WMC or only one WSC)
LED display Blinking red (WCS)
Instructions 1. If the basic accuracy of the Iub signal is
in order but there is too much instability
(the jitter/wander is outside the
acceptable limits), the synchronisation
of the transmission network must be
corrected. The limits for the jitter/
wander are defined in the ITU-T G.823.
No actions on the BTS are needed.
2. Reset the site and wait about 10
minutes.
3. Try a power-on reset. If the alarm
reappears, replace the unit.
If the alarm reappears during the next
few weeks or the clock seems unstable,
replace the unit.
Background information:
The principle in the mobile network is that
RNC => BTS. But in reality that chain
might be broken somewhere and, for
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example, when using leased lines the
not harm the system if also the
provider is accurate/stable enough. The
BTS uses the incoming synchronisation
signal as a reference for the Air interface,
the accuracy requirement of which is set
by 3GPP.
4.112 WSC switch unsuccessful
Name WSC switch unsuccessful
Detecting unit WAM
Fault source Redundant WSC
Meaning The WSC recovery switch over failed.
Event type Start
Unit status Working
Effect The BTS is not operational because the
active WSC was removed or it is faulty
and the recovery switch was
unsuccessful. There is no working WSC
unit and the synchronisation does not
work.
LED display Green
Instructions 1. Fast tune the active unit.
2. Block/unblock the alarming unit. This
may cause a BTS reset.
4.113 WSC/WMC transmission clock missing
Name WSC/WMC transmission clock missing
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Meaning The clock of the BTS, the WSC/WMC
unit, uses the Iub or the signal received
from an external clock as a clock
reference. The signal is routed through
the AXC and WCI to the WSC. This alarm
is generated if the WCI does not receive
the clock reference signal.
Effect Tuning does not follow the external
reference.
The BTS continues its operation with its
own oven oscillator.
The BTS can function properly for a few
decrease gradually.
DEGRADED
LED display Stable red (set by the WSC/WMC itself)
Instructions 1. Check the other transmission-related
alarms, example, link-breaks.
2. Check the AXC settings.
3. Check the transmission cablings.
4.114 WSMA ST-bus error
Name WSMA ST-bus error
Detecting unit WSM
Fault source Alarming WSM, (cable)
Triple-mode: WTR (cable)
Meaning
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The TX signal is transported from the
WSP unit to all WTR units via the WSMs.
The WSM units in different subracks are
connected to each other via the ST
buses. This alarm is generated when the
WSM unit detects errors in the incoming
ST bus from the adjacent WSM unit.
The reason for the failure is the cable
between the WSM front panels or the
WSM units indicated in the alarm.
Unit status Working
Effect The capacity drops. The cell is lost.
LED display N/A
Instructions 1. Run the WCDMA BTS loop test.
2. Check the WSM cables.
3. Replace the units indicated in the alarm
one by one and check whether the
problem is cleared. Refer to the
document WCDMA BTS
4.115 WSMA T-bus error
Name WSMA T-bus error
Triplemode
Detecting unit WSM
Fault source WSP
Meaning The signal is transported from the WSP
unit to the WTR unit via the WSM. This
alarm is generated when the WSM unit
detects errors in the incoming T-bus from
the WSP unit.
The reason for the failure is probably the
WSP or WSM unit. The unit may have
been installed incorrectly or the backplane
cabling is faulty.
Unit status Working
Effect The capacity drops.
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LED display N/A
Instructions 1. Replace the units indicated in the alarm
problem is cleared.
Refer to the document WCDMA BTS
4.116 WSMB does not receive frame clock
Name WSMB does not receive frame clock
Product Supreme; Optima; Triplemode
Detecting unit WSMB
Fault source WCI
Meaning The WSMB does not receive the System
Frame Clock (SFCLK) correctly from the
WCI unit.
This fault may appear, if the only clock
unit (WSC) is removed.
Effect The BTS capacity is degraded.
subrack is not used.
DEGRADED
Instructions 1. Block/unblock the alarming WSM.
Note
This will cause BTS reset.
2. Replace the WCI unit and check
whether the alarm is cleared.
3. Check the backplane cables and
connectors.
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4.117 WSMB RR-bus error
Name WSMB RR-bus error
Compact RF Extension; Triplemode;
MetroSite 50
Detecting unit WSMB/WMC
Fault source WTR
Meaning The signal is transported from the WTR to
the WSP via the WSM. This alarm is
generated when the WSM/WMC unit
detects errors in the incoming RR bus
from the WTR unit.
WTR or WSMB/WMC unit. The unit may
have been installed incorrectly or the
backplane cabling is faulty.
Event type Start
Effect The capacity drops. The cell is lost. In
most cases, this generates an R bus error
alarm and the cell is blocked.
Reported alarms 7653 CELL FAULTY (TX/RX-WTR)
(RX-WTR)
problem is cleared.
connectors. Refer to the document
Instructions.
4.118 WSMB SR-bus error
Name WSMB SR-bus error
Detecting unit WSM
Fault source Adjacent/alarming WSM, (cable)
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Meaning UltraSite:
The RX signal is transported from the
WTR unit to all WSP units via the WSMs.
connected to each other via the SR
buses. This alarm is generated, when the
SR bus from the adjacent WSM unit. The
reason for the failure is the cable between
the WSM front panels or the WSM units
indicated in the alarm.
Triple-mode:
The RX signal is transported from the
WTR30 and WRT20 units (connected to
the SR bus) to the WSP units via the SR
bus. This alarm is generated, when the
WSM detects errors in the incoming SR
bus from the WTR unit.
The reason for the failure is the WSM or
WTR unit or the cable between the WSM
front panel and the backplane.
Event type Start
Effect The capacity drops. The cell is lost. In the
most cases, this generates an R bus error
alarm and the cell is blocked.
DEGRADED
document WCDMA BTS
4.119 WSMB ST-bus error
Name WSMB ST-bus error
Detecting unit WSM
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Fault source Alarming WSM, (cable)
Meaning The TX signal is transported from the
WSP unit to all WTR units via the WSMs.
connected to each other via the ST
buses. This alarm is generated when the
ST bus from the adjacent WSM unit.
The reason for the failure is the cable
between the WSM front panels or the
WSM units indicated in the alarm.
Event type Start
Effect The capacity drops. The cell is lost.
DEGRADED
document WCDMA BTS
4.120 WSMB T-bus error
Name WSMB T-bus error
Compact RF Extension; Triplemode;
MetroSite 50
Detecting unit WSM/WMC
Fault source WSP
Meaning The signal is transported from the WSP
unit to the WTR unit via the WSM. This
alarm is generated when the WSM unit
detects errors in the incoming T-bus from
the WSP unit.
WSP or WSM unit. The unit may have
been installed incorrectly or the backplane
cabling is faulty.
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Event type Start
DEGRADED
document WCDMA BTS
4.121 WSP PCI-bus failure
Name WSP PCI-bus failure
Detecting unit WSPC
Fault source WSPC
Meaning There is a fault in the internal WSP PCI
bus target (DSP) connections. Some of
the WSP DSP processors may be broken
and out of use.
Event type Start
Effect The WSP unit resources are not
available. The BTS capacity decreases.
DEGRADED
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4.122 WSP unit internal failure
Name WSP unit internal failure
Detecting unit WAM
Fault source WSP
Meaning The WAM and WSP are not
synchronised.
Event type Start
DEGRADED
4.123 WTR internal clock faulty
Name WTR internal clock faulty
Detecting unit WTR
Fault source WTR
Meaning The WTR internal system clock is
missing. This can be caused by a missing
or bad quality reference clock signal from
the WSC, or a WTR unit HW failure. The
transmitted and received frequencies are
incorrect.
Event type Start
Reported alarms 7653 CELL FAULTY (TX/RX-TRX)
(RX-TRX)
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connectors.
4.124 WTR internal clock faulty
Name WTR internal clock faulty
Detecting unit WTR
Fault source WTR
Meaning The WTR VCXO PLL is not locked. This
can be caused by a missing or bad
quality reference clock signal from the
WSC or a WTR unit HW failure. The
transmitted and received frequencies are
incorrect.
Event type Start
(RX-WTR)
connectors.
4.125 WTR local oscillator not locked
Name WTR local oscillator not locked
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Detecting unit WTRB
Fault source WTRB
Meaning The TX IF synthesizer (common to both
TX chains) cannot lock to the defined
frequency.
Reported alarms 7653 CELL FAULTY (TX-WTR)
7654 CELL DEGRADED (RX-WTR)
4.126 WTR loop synthesizer not locked
Name WTR loop synthesizer not locked
Detecting unit WTR
Fault source WTR
Meaning The RF loop does not function. The
transmitter output signal is not down-
converted to the receiver frequency.
Unit status Working
Effect The RF loop tests do not function. The
normal RX and TX functionality of the
WTR can continue undisturbed.
Instructions 1. Try to perform the loop test again.
2. Block/unblock the alarming unit.
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4.127 WTR output power decreased
Name WTR output power decreased
Triplemode
Detecting unit WTR
Fault source WTR
Meaning The TX1 RF and/or TX2 RF signal level
of the main RF output is lower than the
predetermined level.
Event type Start
4.128 WTR output power fault
Name WTR output power fault
Triplemode
Detecting unit WTRB
Fault source WTRB
Meaning An amplifier stage is out of order in the
TX chain. The TX is out of order and
needs to be shut down. The downlink
transmission of the TX must be stopped.
Event type Start
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4.129 WTR power supply voltage fault
Name WTR power supply voltage fault
Triplemode
Detecting unit WTRA
Fault source WTRA
Meaning There is a fault in the power feed or RF
cabling, or there is external interference.
One or more critical power supply
voltages or BIAS currents are outside the
allowed range.
Effect The WTR does not transmit.
One or both of the WTR receivers are not
receiving. If either of the receivers is
receiving, the cell is operational, but the
cell performance is degraded due to a
missing diversity receiver.
(RX-TRX)
Instructions 1. Block/unblock the WTR unit belonging
to the alarming cell.
2. Block/unblock the WAF unit belonging
to the alarming cell.
3. Check the RF cabling, connectors,
WTR backplane connectors, external
devices in the antenna line (for
example, MHAs), and external
interference of RX band (with a
spectrum analyser). Refer to the
document WCDMA BTS
4.130 WTR RT-bus fault
Name WTR RT-bus fault
Product
DN7095963
Issue 2-0 en
Alarms
MENU

Detecting unit WTR
Fault source WTR
Meaning The bus clock signal is corrupted or
missing in the RT bus. The signal
frequency should be exactly half of the
system clock frequency.
(RX-TRX)
2. Check the WSM, WSP and WTR.
Note
The problem can be in the unit connector or
backplane cablings.
4.131 WTR synthesizer is not locked
Name WTR synthesizer is not locked
Detecting unit WTR
Fault source WTR
Meaning The TX & RX RF synthesizer or the RX
IF synthesizer is not locked (or the RF
synthesizer buffer amplifier is faulty). The
output frequency of the transmitter can be
wrong or missing, or the receiver might
receive a wrong frequency or is not
receiving.
Event type Start
Issue 2-0 en
MENU

Effect The WTR cannot transmit and/or receive
anything depending on which synthesizer
(TX/RX) is faulty.
(RX-TRX)
7655 CELL NOTIFICATION (RX-TRX)
4.132 WTR temperature is high
Name WTR temperature is high
Detecting unit WTR
Fault source WTR
Meaning The internal temperature of the WTR is
dangerously high.
(RX-WTR)
Instructions 1. Check the other active temperature or
cooling fan-related alarms.
2. If no reason can be found, the sensor is
probably broken. Replace the unit.
DN7095963
Issue 2-0 en
Alarms
MENU

Wcdma bts-alarm-descriptions

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