Have a problem I can't get my head around a solution to:
PSTN Connection is a SIP trunk that supports g711ulaw/g711alaw/g729r8/g722 Running on UC520 with IOS 15.0(1)XA2 (Call Manager Express)
Unity Express 8.0.1
Call flow as follows:
PSTN SIP Trunk ---> Unity Express Auto Attendant ---> Hunt Group (that includes an external PSTN Mobile Number for emergency support for clients)
Basically the calls keep on terminating as soon as the incoming g711u call tries to bridge with a g729 call. I would have thought the transcoding resources on Call Manager Express should begin transcoding rather than attempting to bridge the call with mis-matched codecs?
Now that the call is going out to our emergency mobile contact, the original caller gets bridged audio through to this person so they can speak to our engineer. Remember this call is still in g711u as it was on Unity Express.Call manager Express now tries to invite the original call to talk to the new call, but using G729 now.
Yes I have codec g711ulaw specified on the dial-peer that goes to my CUE AA pilot. I managed a pretty nasty work around by creating a new dial-peer for each of the SNR mobile numbers that locked the codec for those calls to g711ulaw too.
I'll try that debug when I have some spare time to test again. Suspect this might be related to another bug I had previously logged: CSCtb42748
Similar to your workaround, you can accomplish the same with a single dial-peer. If you can configure your dial-peers so that you can get the calls from CUE to match their own inbound dial-peer ('answer-address 6499502xxx' would be the way to do this, but you can't use 'incoming-called number' with a wildcard if you do this since incoming-called number is matched before answer-address), then you can configure just codec 711ulaw on the inbound dial-peer leg.
Another option is to configure CUE's transfer method as blind bye-also (I think the syntax on CUE is ccn cubsystem sip/transfer blind bye). It looks like it is doing an attended or semi-attended transfer right now. The Bye-also will pull CUE out of the call flow before the INVITE for the outbound call, so at that point the codecs to CUE won't matter. You may see ringback issues with this, though.
The short answer is that you don't.... That isn't entirely true while at
the same time it kind of is, but for the most part you don't configure
the softkeys. You enable or disable them via TCL. Here is the long
answer. Be sure to read the whole thing or e...
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