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

[Andy Yerofyeyev]

Ryan , thanks for reply
>
> Note the outbound TCS only has g.729 in it.  This indicates there is no
> codec configured on the inbound dial-peer.  Also of interest is that the
> inbound TCS also only has g.729 so this is probably why your g.711 call
> fails.
>

Here is it :
Jan  7 15:01:47.920: H245 MSC INCOMING PDU ::=
      capabilityTable
        {
          capabilityTableEntryNumber 1
          capability receiveAudioCapability : g729 : 6
        },


> Do you perhaps have MTP required set on the gateway and are invoking a
> g.729 only MTP?
>

MTP Required flag is UNchecked. If I check it call is connected w/729 and
wont connect if incoming DP restricted w/codec g711ulaw. I have 2 software
MTP configured , which belongs to same Region/DP/Location.


> Unless CCM is just matching your TCS I don't know of a device that only
> supports one particular g.729 codec.
>




>
> -Ryan
>
> On Jan 7, 2009, at 10:10 AM, Andy Yerofyeyev wrote:
>
> 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.
>>
>>
>>
>
>


-- 
Best Regards,

Andriy Yerofyeyev CCIE #21607
http://www.linkedin.com/in/ccie21607
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