[cisco-voip] MTP - application log error

[Erik Erasmus (E)]

Hi Scott

thanks for the input

don't you mean G729 in thedial peers - remember I want G711 on the lan
and to pstn at all sites but use G729 between sites. This is something
that is not 100% clear to me. The way I see it if a phone in a branch
phones another phone in the same location they talk G711 controlled by
CCM regions. If the same phone calls to pst then also it uses g711. If
the sam phone calls another phone at HQ the phone can natively swop to
G729 and talk onnet to HQ without using any transcoding because the
phone at HQ via call manager signalling also knows to accept that call
leg in G729. Or am I missing something here.

Is transcoding not just needed when the devices at the ends of the
call leg can not natively support the codec required. Like for example
a call to voicemail system that only supports G711 but you are making
it across the wan and the remote phone needs to talk G729 to the HQ
etc.

I also learned something about ATAs that might be a pointer on the use
of theresources that baffle me - see may reply to the group earlier

erik

________________________________

From: Scott Coner (US) [mailto:scott.coner at us.didata.com]
Sent: Wed 2006-07-12 17:50
To: Kevin Thorngren; Erik Erasmus (E)
Cc: cisco-voip at puck.nether.net
Subject: RE: [cisco-voip] MTP - application log error



Also be sure you specified the g.711 codec in your h.323 dial peers.



Scott



________________________________

From: cisco-voip-bounces at puck.nether.net
[mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of Kevin
Thorngren
Sent: Wednesday, July 12, 2006 11:48 AM
To: Erik Erasmus (E)
Cc: cisco-voip at puck.nether.net
Subject: Re: [cisco-voip] MTP - application log error



Hi Erik,



There are many reason why this could happen. Someone would need to
look at the CCM traces to see what is really happening but here are a
couple of ideas that won't actually cause call failures:



- MoH to a G.729 Region where there is no Transcoder and the G.729
codec is not selected in the IPVMSA service parameters (you mentioned
no MoH to the branches so this might not be the case).

- A failure to allocate a transcoder when the annunciator is invoked.
Do you hear the annunciator when placing calls that fail or do you
just hear reorder?



Kevin

On Jul 12, 2006, at 9:46 AM, Erik Erasmus ((E)) wrote:

	

	Hi

	I am currently busy with implementation of IPt network. HQ
with ccm 4-1-3sr3a, couple of branches with ISR routers as h323 voice
gateways with local breakout via ISDN - to pstn. All phones register
with central CCM server. In general working fine. I noticed something
I am not sure about,  the application logg on the call manager shows
error; not enogh MTP resources - add more MTP- transcoding resources.



	At HQ we use G711, branches use g711 and branch to HQ and HQ
to branch calls use G729. As far as I am concerned we are not using
any MTP - the eventviewer in 2K also shows no MTP being used - so not
sure why the application logg errors.





	No MOH in branches yet only unicast MOH at HQ



	Has anyone else seen this before. CCM4-1-3sr3a and OS2000-4-2





	Erik Erasmus

	


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