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Cisco Bug: CSCuo12138 - H.323 Gateway rejects OLC if prev. H.245 exchange (to OLC) was aborted

Last Modified

Jul 02, 2019

Products (1)

  • Cisco IOS

Known Affected Releases

12.4(24)

Description (partial)

Symptom:
One way audio when Agent blind-transfers a call from PSTN (h.323 gateway) to a second DN, which then CFNA's to Unity

Conditions:
- the issue seems to be a race condition.
- the call flow/scenario that seems to cause the race condition is as follows-

UCCE (CTI RP)          Agent (x6420)---blind-xfer---> x6437-----CFNA---> CUC
                                   \                         /
                                      ----           -----
                                          \       /
                                          CUCM
                                      /    /
               ----------------------/    /  
            /                           /
Gatekeeper                      h.323
       \                          / 
       ------      ------------
               \   /
PBX---PRI--Gateway
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