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Cisco Bug: CSCvv29467 - Microsoft Teams - Direct Routing SBC Test with Media Bypass ON-CUBE- No ringback in blindtransfer

Last Modified

Oct 12, 2020

Products (1)

  • Cisco 2600 Series Multiservice Platforms

Known Affected Releases


Description (partial)

This problem occurs only in this particular call-flow where a MS TEAMS user places a call to PSTN1, and  MS TEAMS user perform an blind transfer to PSTN2.  The result is that no ringback is heard on the PSTN1 phone.

MS TEAMS user == SIP == CUBE ===SIP=== PSTN1/2
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