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Cisco Bug: CSCsz48623 - SIPD isn't calling updateSrtpFallbackSupport for SIPAlertInd

Last Modified

Jul 06, 2017

Products (1)

  • Cisco Unified Communications Manager (CallManager)

Known Affected Releases


Description (partial)

Symptom: Fallback to RTP might not work while CUCM interworks with PGW - leading to call drop.
Conditions: Fallback to RTP fails when PGW sends a 180 with SRTP offer SDP to CUCM. CUCM fails to recognize the Supported:x-cisco-srtp-fallback header in 180 response. This causes the call to drop if the originating CUCM endpoint is RTP only.
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