[Freeswitch-users] How to restrict codec negotiation to ULaw only on incoming leg

Anthony Minessale anthony.minessale at gmail.com
Fri Mar 15 18:52:27 MSK 2013


s'oh

>From cli:
global_setvar absolute_codec_string=PCMU

in vars.xml you could also set it, or alter the codec prefs in that file to
be only PCMU


On Fri, Mar 15, 2013 at 10:51 AM, Anthony Minessale <
anthony.minessale at gmail.com> wrote:

> global_sevar absolute_codec_string=PCMU
>
>
> On Fri, Mar 15, 2013 at 10:45 AM, Adelia C. <hexade at hotmail.com> wrote:
>
>> What are my options when I am looking for a quick fix for the following
>> situation:
>> My in/out traffic is on a few different carriers. Carrier A is sending
>> this SDP on first INVITE, offering PCMA first and PCMU second:
>>
>> v=0
>>
>> o=Sonus_UAC 17329 9183 IN IP4 206.165.95.165
>>
>> s=SIP Media Capabilities
>>
>> c=IN IP4 206.165.95.166
>>
>> t=0 0
>>
>> m=audio 24330 RTP/AVP 8 0
>>
>> a=rtpmap:8 PCMA/8000
>>
>> a=rtpmap:0 PCMU/8000
>>
>> a=sendrecv
>>
>> a=maxptime:20
>>
>> Freeswitch does the right thing by RFC 3264 and selects PCMA but then
>> negotiates PCMU on the outgoing leg. Then, it drops out of the data path
>> and I have another B2BUA in the middle, that can't translate.
>>
>> Can I make FreeSwitch reply with PCMU? [ Am in North America, with pretty
>> much all my traffic on ULaw]
>>
>> I found this suggestion:
>>
>>
>> http://wiki.freeswitch.org/wiki/Codec_negotiation#Late_Negotiation_.28requires_param.29
>>
>>  but I am looking for a quick and dirty fix, where I restrict all to ULaw.
>>
>> Thank you.
>> A.C.
>>
>> _________________________________________________________________________
>> Professional FreeSWITCH Consulting Services:
>> consulting at freeswitch.org
>> http://www.freeswitchsolutions.com
>>
>> 
>> 
>>
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>>
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>>
>>
>
>
> --
> Anthony Minessale II
>
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>
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>
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>



-- 
Anthony Minessale II

FreeSWITCH http://www.freeswitch.org/
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AIM: anthm
MSN:anthony_minessale at hotmail.com
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