[cisco-voip] CUCM MTP and g729

[Peter Slow]

Wes,
   I once filed a defect against ipvmsapp for, if i remember
correctly, ORCAcking ("successfully") a skinny ORC for 729. I can't
remember the exact heaadline, and I think it may actually have been
against the conference bridge portion of the code. maybe there's
similar behavior in the MTP portion of the code? See anything that
looks similar to what I'm describing? It'd be interesting to find it
again and see exactly what it was.

-Pete

On Fri, Jan 11, 2013 at 4:02 PM, Anthony Holloway
<avholloway+cisco-voip at gmail.com> wrote:
> When I do a "show call active voice brief" on the VG224, it shows g729 and
> the IP Address of the CUCM.  That confirms it in another way.  Thanks for
> responding.
>
>
> On Fri, Jan 11, 2013 at 2:43 PM, Justin Steinberg <jsteinberg at gmail.com>
> wrote:
>>
>> interesting.    I always wondered why the software MTP couldn't terminate
>> G729 for things like DTMF mismatch.  It isn't like it is transcoding audio,
>> it is simply handling different DTMF protocols.
>>
>> is it possible Wireshark is just identifying it incorrectly?  could you
>> try to convert it to audio and see if you hear it.
>>
>> On Fri, Jan 11, 2013 at 3:11 PM, Anthony Holloway
>> <avholloway+cisco-voip at gmail.com> wrote:
>>>
>>> Hi All,
>>>
>>> I have a wireshark capture off of my CUCM 8.6(2) which shows that it is
>>> receiving a g729 audio stream from my VG224.
>>>
>>> Long story short, according to the CUCM SRND, the CUCM MTP can only
>>> terminate g711, and yet, attached is a screenshot of the wireshark capture
>>> which clearly shows it terminating g729.
>>>
>>> What piece of this puzzle am I missing?  Also, the CUCM traces read like
>>> the MTP is being invoked on that CUCM.  It's due to the lack of the fm
>>> package on my VG224 and a mismatch in DTMF to the PSTN (SIP).  I had a fun
>>> time resolving that, as you can probably imagine.
>>>
>>> Thanks and Happy Friday!
>>>
>>>
>>>
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>>>
>>
>
>
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