[cisco-voip] how codec transparent works?

[Brian Meade]

If you want us to be able to figure out your H.323 negotiation problem
without codec transparent in place, you need to provide these debugs:
debug h225 asn1
debug h245 asn1

On Mon, May 11, 2015 at 6:33 AM, s m <sam.gh1986 at gmail.com> wrote:

> thank you Ryan,
>
> i have no problem with sip and it is ok (although i do not know it has MTP
> or not). i think transcoder may not needed because as i know, it translate
> two different codecs to each other but in my scenario, both side uses
> g711alaw. please let me know if i misunderstand it.
>
>
> On Mon, May 11, 2015 at 11:31 AM, Ryan Huff <ryanhuff at outlook.com> wrote:
>
>> The reason that is happening is due to media negotiation failure as you
>> mention (both call legs are not offering the same codec capabilities). In
>> that exact configuration, you would need a transcoder (which you could run
>> on the router if you have enough DSP).
>>
>> Are you sold on h323 or can you do a full SIP trunk (with MTP) between
>> cucm and asterisk?
>>
>> Thanks,
>>
>> Ryan
>>
>>
>> -------- Original Message --------
>> From: s m <sam.gh1986 at gmail.com>
>> Sent: Monday, May 11, 2015 12:25 AM
>> To: Ryan Huff <ryanhuff at outlook.com>
>> Subject: Re: [cisco-voip] how codec transparent works?
>> CC: cisco-voip at puck.nether.net
>>
>> hello Ryan,
>>
>> thank you for your reply. without codec transparent, my phone rings but
>> when i answer i have no voice and it hangs up after 5 seconds. asterisk
>> says "no answer". this is so strange for me. i think media negotiation
>> failed, right? is there any hint to have h323 trunk to asterisk with
>> specific codec (not transparent one)???
>>
>> On Sun, May 10, 2015 at 4:32 PM, Ryan Huff <ryanhuff at outlook.com> wrote:
>>
>>> Codec transparent just passes sdp through to the other call leg without
>>> trying to do media negotiations.
>>>
>>> So without codec transparent,  what happens?
>>> Thanks,
>>>
>>> Ryan
>>>
>>>
>>> -------- Original Message --------
>>> From: s m <sam.gh1986 at gmail.com>
>>> Sent: Sunday, May 10, 2015 01:19 AM
>>> To: cisco-voip at puck.nether.net
>>> Subject: [cisco-voip] how codec transparent works?
>>>
>>> hello everybody,
>>>
>>> anybody knows how codec transparent works?
>>>
>>> i have a strange problem. i want to set h323 trunk between asterisk and
>>> cisco 2800. it only works when i set codec transparent in dial-peer nodes.
>>> show commands in cisco shows that i have a call with g711alaw but if i set
>>> codec g711alaw in dial-peers, i do not have any success call. i know it is
>>> codec compatibility problem. is there any difference between g711 codecs
>>> which cisco and asterisk utilize? what happened when codec is set to
>>> transparent? dose anyone know anything about it?
>>>
>>> thanks is advance
>>> SAM
>>>
>>
>>
>
> _______________________________________________
> cisco-voip mailing list
> cisco-voip at puck.nether.net
> https://puck.nether.net/mailman/listinfo/cisco-voip
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://puck.nether.net/pipermail/cisco-voip/attachments/20150511/3dbef9fa/attachment.html>