[cisco-voip] How to use G711 when call placed via CM H323 gateway

[Andy Yerofyeyev]

Ryan, appreciate your reply.

H.245 info gathered from gateway itself. Full version of H.245 asn1 here :
http://pastebin.com/f1529472e

CM configured with Location A (unlimited bw) , Region A (codec G711 inside
Region) , Device Pool A (<-Region A) , Phones and newly created H323 gateway
assigned to location A and DP A.
If I don't put any restriction on incoming dial-peer on h323 gateway (cisco
,2811 , 12.4 ios) call succeed with g729 codec, if I restrict codec to only
711ulaw by using codec class call failed.


On Wed, Jan 7, 2009 at 9:59 AM, Ryan Ratliff <rratliff at cisco.com> wrote:

> The codec selection on the gateway is defined by the codec-class or codec
> command applied to the outbound/inbound voip dial-peer.  On the CUCM server
>  the maximum bandwidth used for a voice call between two devices is set by
> the region configuration.  Because the region is simply a max value, if one
> party in a g.711 region only supports g.729 then assuming the other party
> also supports g.729 the call will be set up using that codec.
> Is the H.245 TCS info you supplied below from the gateway or the CUCM?
>
> -Ryan
>
> On Jan 7, 2009, at 9:51 AM, Andy Yerofyeyev wrote:
>
> Hello ,
>
> I'll appreciate if you can help me understand how codecs is selected and
> how to restrict gateway to use only G711 when call placed via H323 gateway.
> I created H323 gateway , assigned gateway to same device pool and location
> as all of my phones , but when I place call thru this gateway I can see only
> g729 codec in H245 capabilities .
>
> debug h245 asn on gateway itself shows about incoming call (from CM)
>       capabilityTable
>       {
>
>         {
>           capabilityTableEntryNumber 6
>           capability receiveAudioCapability : g729AnnexA : 2
>         },
>         {
>           capabilityTableEntryNumber 5
>           capability receiveAudioCapability : g729 : 2
>         }
>       }
>
>       capabilityTable
>       {
>
>         {
>           capabilityTableEntryNumber 1
>           capability receiveAudioCapability : g729 : 6
>         },
>         {
>           capabilityTableEntryNumber 44
>           capability receiveAndTransmitUserInputCapability : hookflash :
> NULL
>         },
>         {
>           capabilityTableEntryNumber 45
>           capability receiveAndTransmitUserInputCapability : basicString :
> NULL
>         },
>         {
>           capabilityTableEntryNumber 46
>           capability receiveAndTransmitUserInputCapability : dtmf : NULL
>         }
>       }
>
> If I use Non-gatekeeper controlled intracluster trunk situation pretty the
> same. Just FUI , location bandwidth is Unlimited and 711 codec configured to
> use inside Region to which phones and gateway belongs to. If call placed
> from one 7960 to anoter they use 711 codec.
>
> If I restrict to use only 711 codec on gateway itself (by using codec-class
> on incoming dial-peer) call failed.
>
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://puck.nether.net/pipermail/cisco-voip/attachments/20090107/aa62d00f/attachment.html>