[Freeswitch-users] Codec negotiation with carriers

[Anto]

Hello

I have searched previous messages in the list, I consulted the book of
FreeSWITCH (which I bought over a year), wiki and so on. I still do
not understand how and why in some cases I work. Also I downloaded
frontend to consult your code if there was something about this, but
still the same. I have several weeks with this question and I can not
find it. In the end I decided to spend the gateway to Asterisk, and
you at least understand its operation. Thank you very much to all :-)

Best regards
Anto

2012/3/11 Anto <potxoka at gmail.com>:
> Hi
>
> I still do not find the solution and not really understanding, because
> it works:-S
>
> regards
> anto
>
> 2012/3/7 Anto <potxoka at gmail.com>:
>> Hello
>>
>> Attached file, with the traces of the different tests (with different
>> configurations).
>>
>> http://pastebin.freeswitch.org/18599
>>
>> I have read the url that you mentioned, the initial guide FreeSWITCH,
>> that of mod_sofia, applications, etc.. I believe that most of the wiki
>> (maybe when do not give the solution, read as much documentation is
>> worse idea :-S, lock me more).
>>
>> I made a configuration that works (I have not tested the audio), but
>> earlier (before I started "touch" the profiles) if I could talk to a
>> physical phone (several times). The problem is that I can not
>> understand why it works and sometimes not, and I would like to learn
>> :-). Not only do and forget, so I would like to learn and less
>> disturbing to the mail list and (maybe in the future) to help other
>> newbies like me :-). Thanks !
>>
>> Best regards
>> Anto
>>
>> 2012/3/7 Michael Collins <msc at freeswitch.org>:
>>> You may want to read up on codec negotiation:
>>> http://wiki.freeswitch.org/wiki/Codec_negotiation
>>>
>>> There are different ways to handle codecs depending on your needs. I'd read
>>> that page first and then try out some of the suggestions. If you're still
>>> having trouble then I'd recommend getting SIP traces of the traffic and
>>> putting them on pastebin.freeswitch.org. The gang here is pretty good at
>>> looking over logs and helping with diagnosing problems. :)
>>>
>>> -MC
>>>
>>> On Tue, Mar 6, 2012 at 2:30 PM, Anto <potxoka at gmail.com> wrote:
>>>>
>>>> Hi
>>>>
>>>> I am following the steps in this direction
>>>> "http://wiki.freeswitch.org/wiki/SBC_Setup" and
>>>> "http://wiki.freeswitch.org/wiki/Provider_Configuration:_Broadvoice",
>>>> I reread the whole entire wiki (or so I lack), but do not quite
>>>> assimilate or finding the right formula to operate the bridge :-S.
>>>>
>>>> I captured traffic with ngrep, I enabled sip-trace, console logconsole
>>>> 8, etc., but unless the transcoding error (only two of the hundreds of
>>>> combinations of settings that I have), I have not seen anything
>>>> "weird" :-S
>>>>
>>>> I have 3 suppliers, each with this codec:
>>>>
>>>> 1)           2)              3)
>>>> G729        G729        G729
>>>> G711u      G711A      G711A
>>>> G711A     G711u       G711u
>>>>                G723         G723
>>>>                                  G722
>>>>                                  GSM
>>>>
>>>> I think I understand that when making an outside call, FreeSWITCH
>>>> follow these steps:
>>>>
>>>> USER -> (   Dialplan -> profile (internal) -> bridge (external) ->
>>>> profile (external)   ) -> PROVIDER
>>>>
>>>> PROVIDER -> (   Dialplan -> profile (external) -> bridge (internal) ->
>>>> profile (internal)  ) -> USER
>>>>
>>>> right?
>>>>
>>>> Internal and external I set as follows (and not many changes have
>>>> done, and not remember it, because I've been testing days). If
>>>> outbound (outbound-codec-prefs) all codecs specified system does not
>>>> handle the call, I have to specify these by hand. If active
>>>> inbound-proxy-media, not the caller. Some of the time I worked, but
>>>> gave me an error that it can do transcoding G729 codec (I do
>>>> passthrough), but the proxy does not work half.
>>>>
>>>> If the outbound property (outbound-codec-prefs) all codecs specified
>>>> system does not handle the call, I have to specify these by hand. If
>>>> active inbound-proxy-media, not the caller. Some of the time I worked,
>>>> but gave me an error that it can do transcoding G729 codec (I want to
>>>> make passthrough), but the "proxy media" does not work.
>>>>
>>>> Basically, what I do is that local users can use all the codecs
>>>> allowed (iLBC, GSM, ...) and make an outside call, use the carrier
>>>> that will indicate the priority but the free codec.
>>>>
>>>> With this configuration works for me, but I would like to understand
>>>> why so if it works and otherwise no. Coming to understand how to
>>>> configure properly and so as not to disturb the mail list ;-). Thanks
>>>> !
>>>>
>>>> Best regards
>>>> Anto
>>>>
>>>> vars.xml
>>>>
>>>> <X-PRE-PROCESS cmd="set"
>>>>
>>>> data="global_codec_prefs=iLBC,G7221,speex,PCMU,PCMA,BV16,G726-32,GSM,G729,G723,AMR"/>
>>>> <X-PRE-PROCESS cmd="set"
>>>>
>>>> data="carriers_codec_prefs=PCMU,PCMA,G729,G723,AMR,iLBC,G7221,speex,BV16,G726-32,GSM"/>
>>>>
>>>> internal.xml
>>>>
>>>> <param name="codec-prefs" value="$${global_codec_prefs}"/>
>>>> <!--param name="inbound-codec-prefs" value="$${global_codec_prefs}"/>
>>>> <param name="outbound-codec-prefs" value="$${global_codec_prefs}"/-->
>>>> <!--param name="inbound-codec-negotiation" value="generous"/-->
>>>> <param name="inbound-codec-negotiation" value="greedy"/>
>>>> <param name="inbound-late-negotiation" value="true"/>
>>>> <param name="renegotiate-codec-on-reinvite" value="true"/>
>>>> <!--param name="inbound-proxy-media" value="true"/-->
>>>>
>>>> external.xml
>>>>
>>>> <param name="codec-prefs" value="$${carriers_codec_prefs}"/>
>>>> <param name="inbound-codec-prefs" value="$${carriers_codec_prefs}"/>
>>>> <!--param name="outbound-codec-prefs" value="$${carriers_codec_prefs}"/-->
>>>> <param name="outbound-codec-prefs" value="PCMU,PCMA,G729,G723"/>
>>>> <!--param name="inbound-codec-negotiation" value="generous"/-->
>>>> <param name="inbound-codec-negotiation" value="greedy"/>
>>>> <param name="inbound-late-negotiation" value="true"/>
>>>> <param name="renegotiate-codec-on-reinvite" value="true"/>
>>>> <!--param name="inbound-proxy-media" value="true"/-->
>>>>
>>>> dialplan/outbound.xml
>>>>
>>>> <include>
>>>>        <context name="internal">
>>>>                <extension name="outbound">
>>>>                  <condition field="destination_number"
>>>> expression="^(\d+)$">
>>>>                        <!--action application="set"
>>>> data="inherit_codec=true"/-->
>>>>                        <!--action application="set"
>>>> data="hangup_after_bridge=true"/-->
>>>>                        <!--action application="set"
>>>> data="proxy_media=true"/-->
>>>>                        <action application="bridge"
>>>> data="sofia/gateway/provider-2/$1"/>
>>>>                  </condition>
>>>>                </extension>
>>>>        </context>
>>>>
>>>> _________________________________________________________________________
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>>>> consulting at freeswitch.org
>>>> http://www.freeswitchsolutions.com
>>>>
>>>> 
>>>> 
>>>>
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>>>
>>>
>>>
>>> _________________________________________________________________________
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>>> consulting at freeswitch.org
>>> http://www.freeswitchsolutions.com
>>>
>>> 
>>> 
>>>
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>>>
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