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Cisco Bug: CSCuo83338 - MGCP originated SRTP call falls back to RTP when reINV received

Last Modified

Feb 26, 2019

Products (7)

  • Cisco Unified Communications Manager (CallManager)
  • Cisco Intercompany Media Engine
  • Cisco Business Edition 5000 Version 9.1
  • Cisco Unity Connection Version 9.1
  • Cisco Business Edition 6000 Version 9.1
  • Cisco Unified Communications Manager Version 9.1
  • Cisco Unified Communications Manager Session Management Edition

Known Affected Releases


Description (partial)

When TB endpoint calls to MGCP phone, while sending second invite, it updates the o line with incremented version number. This causes the new offer answer in the process to not set the variable mSipsRTP to true. 
Due to this the secure offer which comes to MGCPIF is forwarded as non-secure i.e SRTP=False.

EX60 Version 7.1.2RC1
VCS 7.x
CUCM 9.1
MGCP IOS 15.2(4)M7
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Bug Details Include

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