
36 Troubleshooting
milliseconds between each for a response. After the tenth retransmission,
the TPS prints an error message indicating that the RUDP link failed,
marks the telephone as offline, and notifies the Call Server core.
When the IP Phone fails to receive the watchdog timer reset message,
the watchdog timer times out, reboots, and begins registration. This
occurs when a network fails or high traffic through a router causes the
messages to be lost or delayed. This can happen when the IP Phone is
on a subnet different from the TPS TLAN and one of the network routers
drops packets. The RUDP polling message is a plain UDP message and
is thus a candidate for being dropped before higher priority packet data.
Another possibility is that the IP Phone remains unplugged while the TPS
card polls it.
The following is an example of the messages printed on the Maintenance
port of the TPS card for this scenario:
JAN 23 15:32:59 tRDP: Error ITS2008 Terminal connection
status: 192.168.1.141 lost (20)
JAN 23 15:32:59 tVTM: Notice 192.168.1.141 Unregistered,
terminal = 0x3a86e64, device = 0x3a86ff8
JAN 23 15:32:59 tSET: Info Terminal offline 192.168.1.141
TN 0x6005
Then when the telephone reboots and registers, the following prints:
JAN 23 15:36:50 tCSV: Info 192.168.1.141 Connecting to node
1, TN: 61.1, 0x6005
JAN 23 15:36:52 tVTM: Info ITS5008 Terminal connection
status: 192.168.1.141 ok (20)
JAN 23 15:36:53 tSET: Info 192.168.1.141 TN 61-01
Registered with M1
IP Phone reboots or power cycles between pollings
If the IP Phone reboots or has power cycled between pollings, the TPS
does not detect the failure but receives an unexpected registration.
Because the TPS does not determine that the IP Phone was offline, a
different sequence of messages print:
JAN 23 15:39:37 tCSV: Info 192.168.1.141 Connecting to node
1, TN: 61.1, 0x6005
JAN 23 15:39:39 tRDP: Warning 192.168.1.141 Connection
restarted, cid = 0x33cdb28
JAN 23 15:39:39 tVTM: Notice 192.168.1.141 Unregistered,
terminal = 0x33cd74c, device = 0x33cd4b4 JAN 23 15:39:39
tSET: Info Terminal offline 192.168.1.141 TN 0x6005
JAN 23 15:39:39 tVTM: Info ITS5008 Terminal connection
Nortel Communication Server 1000
Troubleshooting Guide for Distributors
NN43001-730 02.02 31 December 2009
Copyright © 2008-2009 Nortel Networks. All Rights Reserved.
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