I read those docs, but I still can't understand the point.
It seems to me that CUBE fills H245 TCS message in strange ways, and the call can't be completed.
-> TCS(g711,g729) ->
<- TCS(g729A,g729) <-
and I want the call to be setup in G711 (but I need also g729 in TCS for next call transfer). The voice class contains both g711 and g729, in this order, but the CUBE does not care of g711 and declares 29.
The other part of the call (outbound respect to CUBE) must be only g729.
Try adding the following command in the CUBE configuration:
voice service voip
h245 passthru all
You might also try with 'codec transparent' specified on both the inbound and outbound dial-peers in CUBE in order to allow CUBE to send through all codecs it receives without influencing the codec selection.
"codec transparent" command cannot help me, because CUBE must influence codec selection.
The scenario is illustrated in the attached ppt slide. In the first part of the call I want cube to allocate a transcoding resource, to convert g711 (inbound codec, cube perspective) to g729 (outbound codec, cube perspective). After the transfer is done, the call should be all g729. So, if I use codec transparent I am not able to set up first part of the call in g711: cube must force g711 codec on the south, but needs also to allow g729 for the second part of the call.
I hope to have explained it well. If not, please ask me.
What solution did you use, if you don't mind me asking?
As far as CUBE goes, I think I have the answer. It can be done only using 2 transcoders.
CUBE can't add or remove transcoder mid-call, and while CUCM can add a transcoder during transfers it seems it can't remove a transcoder mid-call. So in our case during the transfer the xcoder just signals media error and drops the call.
The solution is to use one transcoder on CUBE (CME registered) - this one will always xcode the incoming call from g729 to g711, then there needs to be another xcoder on CUCM - CUCM will use it during transfer to transcode between the CUBE call leg (g711) and phone C call leg (g729).
BTW, I need this functionality in UCCE environment with Outbound Dialer and VoIP connection to PSTN (g729 only).
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