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Cisco Bug: CSCua88902 - modem relay call fails when using PVDM3

Last Modified

Mar 05, 2018

Products (1)

  • Cisco 3900 Series Integrated Services Routers

Known Affected Releases


Description (partial)

modem relay call fails in the following call flow
Analog STE Phone---fxs port-GW--SCCP---CUCM---MGCP---3945---PRI---PSTN

ios version: c3900-universalk9-mz.SPA.152-3.T.bin

If using the phone on FXS port to initiate the secure mode, the call works
If using the phone on the PSTN to initiate the secure mode, the call fails.

Replacing PVDM3 with PVDM2 resolved the issue.

modem relay is configured
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  • Full Description (including symptoms, conditions and workarounds)
  • Status
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