[Freeswitch-users] Re- read_codec/read_rate vs. write_codec/write_rate channel variables

Andrew Keil andrew.keil at visytel.com
Fri Nov 3 01:11:14 UTC 2017


To FreeSWITCH Users,

I am just looking for confirmation of the following:


  1.  If I receive an inbound call to FreeSWITCH (the codec is negotiated and the call is answered by FreeSWITCH) and there is NO call bridging done, then am I correct that only the read_codec & read_rate channel variables apply (for CDR purposes)?


  1.  If I make an outbound call from FreeSWITCH (using originate api command) and once again there is NO call bridging done, then am I correct that only the write_codec & write_rate channel variables apply (for CDR purposes)?


  1.  When using mod_conference (for conferencing two inbound calls together or one inbound and one outbound (using originate api command) together) does this affect the read_codec & read_rate and write_codec & write_rate channel variables in any way?

The reason I ask this is I noticed the following on an outbound call made (using the originate api command) recently and wanted to better understand what the read_codec & read_rate are used for when NO call bridging is done:

read_codec: L16
read_rate: 8000
write_codec: PCMA
write_rate: 8000

I appreciate the clarification.

Andrew
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