Additional information:
With path replacement ENABLED on the CUCM, we see the following scenarios in Nortel.
SCENARIO: RESULTS:
Cisco-->[QSIG]-->Nortel-->Nortel FAIL - and we see (BUG279, BUG9026, BUG4001,and XMI000)
Cisco-->[QSIG]-->Nortel -->Cisco...
Background: CS1000M (option 81) release 5.0 TIE [QSIG] to CUCM 8.5 with Path Replacement (tromboning OFF) worked for two years.
Problem: Upgraded Nortel to 7.0 - one way communication on Nortel side. Cisco phones hear two-way, Nortel phones hear nothing (or they may hear dial-tone)...
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