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Outbound voice call from VTA failing through H323 IOS gateway when using VT advantage with CallManager. The PSTN releases the call with the Cause code = Incompatible destination when using VT advantage with CallManager error message
The calling party is video enabled (IP phone with Cisco VT Advantage [CVTA]). The calling party and gateway are in different regions, between which the Video Call Bandwidth is set to None.
For a workaround, issue the bearer-cap speech command on the voice port.
Note: This command forces the calls to use audio only, which allows the calls to work. This bypasses the bearer capabilities mismatch.