-If the -v (verbose) flag is given twice, additional information is printed,
-such as the the RX call ID, call number, sequence number, serial number,
-and the RX packet flags.
+If the -v (verbose) flag is given, the RX call number and sequence number
+are printed.
+.LP
+If the -v flag is given twice, additional information is printed.
+such as the the RX call ID, serial number, and the RX packet flags.
+The MTU negotiation information is also printed from RX ack packets.