[cisco-voip] iLBC and Gateways

Wed Apr 15 22:11:46 EDT 2009

OK, I upgraded to 12.4(24)T and it works fine...

On Wed, Apr 15, 2009 at 8:42 PM, Jonathan Charles <jonvoip at gmail.com> wrote:

> OK, weird... On a call, iLBC with an MGCP gateway... I conference on a 3rd
> party and the call switches to G.711 (as it should)... however, I get dead
> air... one party disconnects and the call goes back to iLBC and works
> fine...
>
>
> Gateway is a Cisco 2851 running 12.4.22T, CUCM 7.0(1)
>
> I have one PRI, but two PVDM2-64s and one PVDM2-32 in the router...
>
>
> Jonathan
>
>
> On Wed, Apr 15, 2009 at 8:19 PM, Jonathan Charles <jonvoip at gmail.com>wrote:
>
>> That seems dumb...
>>
>> I got it to work fine with MGCP...
>>
>> Also, I am noticing that my 7965s are not switching to 711 for conf calls
>> and we just get dead air...
>>
>>
>> J
>>
>>
>> On Mon, Jan 19, 2009 at 11:17 AM, Ryan Ratliff <rratliff at cisco.com>wrote:
>>
>>> Apparently IOS supports it (for H.323) but for some reason CUCM doesn't.
>>>   Not sure if it's a roadmapped feature or not.
>>>
>>> -Ryan
>>>
>>> On Jan 19, 2009, at 11:11 AM, Ryan Ratliff wrote:
>>>
>>> I suspect H.245 doesn't support iLBC (yet).
>>> Looking in the ASN description from
>>> http://www.packetizer.com/ipmc/h323/standards.html the latest H.245
>>> version doesn't seem to list iLBC.
>>> I could be reading it wrong though...
>>>
>>> -Ryan
>>>
>>> On Jan 19, 2009, at 10:53 AM, STEVEN CASPER wrote:
>>>
>>> TAC just sent me an email that iLBC is not supported on h323
>>> gateways....strange I wonder why?
>>>
>>>
>>> http://www.cisco.com/en/US/docs/voice_ip_comm/cucm/srnd/6x/trunks.html#wp1044377
>>>
>>> I checked the SRND for CUCM 7.x Ilbc is not listed as a supported codec
>>> there either.
>>>
>>> Steve
>>>
>>>
>>>  STEVEN CASPER <SCASPER at mtb.com> 01/16/09 8:34 AM >>>
>>>
>>> Got this to work with a MGCP gateway. Had to add/do the following:
>>>
>>> mgcp codec ilbc
>>> ccm-manager mgcp codec-allno mgcp mgcp Still can not negotiate using
>>> H323, opened a TAC case, will post fix when I get it. Steve
>>> Please consider the impact on our environment before printing this
>>> e-mail.
>>>
>>>  Ryan Ratliff <rratliff at cisco.com> 12/22/2008 11:18 AM >>>
>>>
>>> What type of gateway is it? If H.323 make sure iLBC is either set on the
>>> voip dial-peer or in a codec class applied to the dial-peer.
>>>
>>> If MGCP check out
>>> http://www.cisco.com/en/US/docs/ios/12_4t/12_4t15/it_amrnb.html.
>>>
>>>
>>>
>>> -Ryan
>>>
>>> On Dec 22, 2008, at 11:06 AM, STEVEN CASPER wrote:
>>>
>>> Doing some testing with iLbc. I can place a call from IP phone (7962) to
>>> IP phone 7962 using iLbC and 7962 to IP Communicator 7 and I see I am using
>>> the iLBC codec on each end of the connection. I negotiate G729 when I use a
>>> gateway to reach the PSTN. Far as I can tell all is set up correctly with my
>>> regions, locations, device pools etc. Is iLBC supported in the following
>>> path between the phone and gateway?
>>> 7962 --IP------2851-------PRI-------PSTN
>>> Gateway is running 12.4.20T and CUCM is 6.1.1
>>> Thanks
>>> Steve
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>>
>
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