[Freeswitch-users] AMR Codec for A-leg and GSM Codec for B-leg

[Steven Ayre]

Ron, note there's a lot of changes between v1.6.19 and 1.8 (master). Only
master has the README instructions Brian mentioned.

On 17 August 2017 at 15:38, Brian West <brian at freeswitch.org> wrote:

> Did you bother to read the README in the mod_amr folders?
>
> On Wed, Aug 16, 2017 at 8:54 PM, Steven Ayre <steveayre at gmail.com> wrote:
>
>> mod_amr doesn't allow transcoding for licensing reasons. It only supports
>> passthrough mode where both sides support it so that the raw data can be
>> passed between them and the clients use their own licensed AMR codec. It
>> also means anything that uses media can't be used on those calls (eg
>> playback, eavesdrop).
>>
>> On 15 August 2017 at 07:58, Ron <ron.menez at entropysolution.com> wrote:
>>
>>> Hi All,
>>>
>>> Is it possible to use AMR Codec to A-leg and GSM Codec for B-leg or vice
>>> versa?
>>>
>>> Tried the following configuration in sip profiles:
>>>
>>> <param name="inherit_codec" value="true"/>
>>> <param name="inbound-late-negotiation" value="true”/>
>>> <param name="disable-transcoding" value="false”/>
>>>
>>> We received an error in the logs:
>>>
>>> e178024a-8180-11e7-9d17-e38b940a41a7 2017-08-15 06:13:45.955687 [DEBUG]
>>> switch_ivr_originate.c:3833 Originate Resulted in Error Cause: 88
>>> [INCOMPATIBLE_DESTINATION]
>>> e178024a-8180-11e7-9d17-e38b940a41a7 2017-08-15 06:13:45.955687 [INFO]
>>> mod_dptools.c:3418 Originate Failed.  Cause: INCOMPATIBLE_DESTINATION
>>> e178024a-8180-11e7-9d17-e38b940a41a7 2017-08-15 06:13:45.955687
>>> [NOTICE] switch_channel.c:4822 Hangup sofia/internal/09589999999 at 10.
>>> 1.0.5 [CS_EXECUTE] [INCOMPATIBLE_DESTINATION]
>>>
>>>
>>> We also tried to use the absolute_codec_string configuration in
>>> dialplan:
>>>
>>> <action application="bridge" data="{absolute_codec_string=G
>>> SM}sofia/internal/${destination_number}@10.1.0.4:5080
>>> <http://destination_number%7D@10.1.0.4:5080>"/>
>>>
>>>
>>> The error we received on this is:
>>>
>>> 2017-08-15 06:17:29.755700 [ERR] mod_amr.c:338 This codec is only usable
>>> in passthrough mode!
>>> 2017-08-15 06:17:29.755700 [ERR] switch_core_io.c:1434 Codec AMR encoder
>>> error!
>>>
>>>
>>> For your kind advice please.
>>>
>>> TIA.
>>>
>>> Best Regard,
>>>
>>> Ron Menez
>>> ron.menez at entropysolution.com
>>>
>>>
>>>
>>>
>>>
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>>
>>
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>
>
>
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>
> *Brian West*
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