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Cisco Bug: CSCus82737 - CUCM does not inform phone to stop encrypting on SRTP to RTP fallback

Last Modified

Nov 14, 2015

Products (1)

  • Cisco Unified Communications Manager (CallManager)

Known Affected Releases

10.5(1.10000.7) 10.5(2.10000.5) 8.5(1.10000.26) 8.6(2.10000.30) 9.1(2.12900.11)

Description (partial)

Symptom:
One way audio for calls from 7925 wireless phone to PSTN through H323 gateway.
Voice stream from the 7925 phone is coming to the gateway but it is encrypted and gateway cannot decrypt it.

Conditions:
Fail over from SRTP to RTP:
1. Primary choice is to go through SIP trunk (secured/encrypted).
2. If the call through SIP trunk fails, call should fail over to H323 gateway (unsecured/unencrypted).
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Bug Details Include

  • Full Description (including symptoms, conditions and workarounds)
  • Status
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