[Freeswitch-users] Codec Negotiation Help

[Michael Collins]

This may just be not setting the chan variable correctly in your enterprise
originate string. What does your enterprise originate look like?

-MC


On Tue, May 7, 2013 at 9:03 AM, Spencer Thomason <spencer at 5ninesolutions.com
> wrote:

> Hello all,
> I'm having a bit of trouble getting codec negotiation working the way I'd
> like to.  I'm trying to avoid transcoding unless its absolutely necessary
> for the call to be setup.  I use two profiles with late negotiation
> enabled, an internal facing registered user endpoints and an external
> facing the PSTN via various ITSPs.  For calls to users I've been setting
> codec_string=${ep_codec_string} in my dial strings and normal bridges work
> fine but I'm now reworking the hunt groups using enterprise originate and
> that doesn't seem to work correctly (the callee's preferences are always
> used).  So I'd like to do the the "right" way now :-)
>
> The basic scenario is this:
>
> On the internal profile I have:
> CODECS IN               G722,PCMU,G729,GSM
> CODECS OUT              G722,PCMU,G729,GSM
>
> On the external profile I have:
> CODECS IN               G722,PCMU,G729
> CODECS OUT              G722,PCMU,G729
>
> What I'm trying to accomplish is this:
> Call from PSTN, use caller's codecs as priority for the bridge, i.e.
> PSTN GW --- PCMU, G729 -->  FreeSWITCH --- PCMU,G729,G722, GSM ---> Local
> Endpoint
> PSTN GW --- G729,PCMU -->  FreeSWITCH --- G729,PCMU,G722, GSM ---> Local
> Endpoint
> PSTN GW --- G722,PCMU -->  FreeSWITCH --- G722,PCMU,G729, GSM ---> Local
> Endpoint
>
>
> Call from local endpoint to PSTN, use callee's codecs as priority for the
> bridge, i.e.
> Local Endpoint Offers G722, PCMU, G729
> GW Responds PCMU,G729
> Local Endpoint --- G722,PCMU,G729 ---> FreeSWITCH --- G722,PCMU, G729 -->
> PSTN
> Desired negotiation: Both legs use PCMU
>
> Local Endpoint Offers G722, PCMU, G729
> GW Responds G729,PCMU
> Local Endpoint --- G722,PCMU,G729 ---> FreeSWITCH --- G722,PCMU,G729 -->
> PSTN
> Desired negotiation: Both legs use G729
>
> Local Endpoint Offers GSM
> GW Responds PCMU, G729
> Local Endpoint --- GSM ---> FreeSWITCH --- G722,PCMU,G729 --> PSTN
> Desired negotiation: Leg A uses GSM, Leg B uses PCMU, FreeSWITCH
> transcodes.
>
> Any help is greatly appreciated!
>
>
> Thanks,
> Spencer
>
>
>
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>
> 
> 
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-- 
Michael S Collins
Twitter: @mercutioviz
http://www.FreeSWITCH.org
http://www.ClueCon.com
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