Nortel Communication Server 100 Manual page 140

140 Carrier Remote IPE acceptance testing
Procedure 35
Testing Forced carrier failure and switchover
Step
1
2
3
4
5
6
7
8
9
Action
Check the status of all three links by executing the D S [P]
command from the MMI terminal.
Make sure that the two primary and the spare links are functional
without an alarm condition.
Establish a call from the Carrier Remote IPE to the local system
site over carrier link 1.
Refer to "Voice calls" (page 136)
Manually disable carrier link 1 by unplugging the link at the I/O
panel.
The call is transferred to carrier link 2 (spare).
The call should continue to be established.
Manually disable carrier link 0 by unplugging the carrier cable at
the I/O panel.
The spare link 2 should release carrier link 1 and spare carrier
link 0.
Note: Carrier 0 has sparing priority over carrier link 1;
therefore, when carrier 0 was disabled, the spare carrier 2
terminated carrier 1 sparing and established sparing of carrier
0.
Verify that the call is no longer established over the spare link
(link 2), since the call was established over carrier 1, which has
been dropped and is no longer spared.
Execute the STAT command in LD 32 to show the sparing status.
Reconnect carrier link 0.
As soon as carrier link 0 recovers and becomes operational, the
spare carrier 2 automatically spares carrier 1.
Reestablish the call over carrier link 1, which is now spared over
carrier link 2.
Check and make sure that the call is established.
Reconnect carrier link 1 and wait until carrier 1 has reestablished
communication.
The established calls should continue to be connected over the
carrier link 1.
Nortel Communication Server 1000
Carrier Remote IPE Fundamentals
NN43021-555 04.01 4 June 2010
Copyright © 2007-2010 Nortel Networks. All Rights Reserved.
to establish the call.