CCME 4.1 site to site voicemail issues

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Feb 6th, 2008
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I have a customer with 2 sites each has their own express 4.2 call agent and Cue flash for voicemail. the wan link works fine for voice calls between the 2 sites. However you cannot leave a voicemail for any user at either site. Intrasite vm is fine and also pstn vm is fine. but any intersite vm, the call is dropped. I have attached config, I am sure I have missed something.

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Rob Huffman Wed, 02/06/2008 - 07:43
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Hi David,

This is likely a codec/transcoding issue here. CUE only does G711 and if the calls are coming in across the WAN as G729a 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.

Hope this helps!


silex Wed, 02/06/2008 - 08:34
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Thanks, Rob

I have transcoding configured and it is enabled

My understanding is that the transcoding, once configured will automatically transcode where neccesary. DO I need to do something else?

when I ring the VM pilot number for each site, the call rings for three times before dropping, which is strange as I would have thought I would get an auto answer straight away.

vinhnguyen Wed, 07/27/2011 - 05:32
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Hi Silex

Did you manage to fix this issue?  I am having the same issue.  Transcoding is all setup on gateway containing CUE but when calls going across WAN it just goes busy.

Aaron Harrison Wed, 07/27/2011 - 05:39
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Post up your config; we can then assist.

There are a few gotchas with this setup.




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