[Freeswitch-users] Cannot force transcoding between PCMU and PCMA

[Kliment Toshkov, Netfinity JSC]

Hello,

I have to force transcoding between PCMU and PCMA in the following scenario:

Customer [PCMA, PCMU, G729] > Kamailio > Freeswitch 1..N > termination gateway [PCMA]

I need transcoding from PCMU and G729 to take place on Freeswitch boxes. Currently it works for G729 but for PCMU calls they are originated with PCMU.

Inbound profile:
<param name="inbound-codec-prefs" value="$${global_codec_prefs}”/>
<param name="disable-transcoding" value="false"/>

Outbound profile:
<param name="outbound-codec-prefs" value="$${outbound_codec_prefs}"/>
<param name="disable-transcoding" value="false"/>

vars.xml:
  <X-PRE-PROCESS cmd="set" data="global_codec_prefs=PCMA,PCMU,G729"/>
  <X-PRE-PROCESS cmd="set" data="outbound_codec_prefs=PCMA"/>


In xml dial plan:
              <action application="set" data="inherit_codec=false"/>
              <action application="set" data="media_mix_inbound_outbound_codecs=true"/>

But the calls are still not transcoded between PCMU and PCMA.

Only one thing worked - forcing the codec in bridge app:
                <action application="bridge" data="{absolute_codec_string='PCMA'} ..."/>

But I really need to know what I am missing and how to fix it using config files only. Brute force is not preferred.

Thank you!

Kliment Toshkov
Key Accounts

24/7: 0700 30000 w: www.netfinity.bg <http://www.netfinity.bg/>
t: +359 2 4918888 f: +359 2 4815555

 <http://www.netfinity.bg/>

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