CUE only does G711 so this would be expected behaviour. There is a need in this setup for local Transcoding.
Codecs and Transcoding
Cisco Unity Express supports only G.711 voice streams, so all calls made into the system (including those from IP phones, PSTN gateway ports and any other VoIP equipment in your network) must use G.711 if they enter the AA or voice mail pilot numbers that terminate on Cisco Unity Express.
If you require that G.729A calls traverse IP segments of your network between sites, and that these calls forward or dial direct into Cisco Unity Express AA or voice mail, then you must use a transcoding resource collocated with Cisco Unity Express to change the voice stream from G.729A to G.711 before the voice stream enters the AA or ***voice mail pilot numbers.
i am not sure if i got your answer, but i do have transcoding and i have forced the ephone to work g729 but still when calling the CUE it goes G711. (note that when i call another ip phone G729 is the codec)
i know that CUE only accepts G711 that's is why i have the transcoding configured but there still something missing, a mystery.
i can see it is a limitation, i mean when the ip phone sees the G711 he just use it and not the G729 instead of calling the transcoder.
I am just thinking loudly, but try it and you will see what i am talking about ;-)
just to let you know that the dspfarm assit was missing which did the JOB. in fact codec g729 works great to force calls between IP phones to be G729 but when it comes to having transcoding involved we need to include the assist
From IP Phone across WAN into Unity Express the transcoding resource convert the G729 to G711. However what happen to the prompt being played by Unity Express back to IP Phone. Does the transcoding resource convert G711 back to G729 and send it back over the WAN?
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