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Cisco Bug: CSCvv95137 - MRA calls to PSTN occasionally resulting in failure during the setup phase

Last Modified

Oct 30, 2020

Products (1)

  • Cisco TelePresence Video Communication Server Software

Known Affected Releases


Description (partial)

Call from MRA registered device to the PSTN occasionally fails.

Call flow is MRA user -> Exp-E -> Exp-C -> CUCM -> CUBE -> PSTN where the ExpC (B2BUA) receives a SIP UPDATE after the SIP 183.
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