[asterisk-bugs] [JIRA] (ASTERISK-26339) asterisk change the codec of inbound channel when bridge to another channel.

[Aaron An (JIRA)]

    [ https://issues.asterisk.org/jira/browse/ASTERISK-26339?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=232152#comment-232152 ] 

Aaron An edited comment on ASTERISK-26339 at 9/6/16 1:42 AM:
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I have review the code of asterisk codec negotiation. It seems that this situation is by design. asterisk change the codec sent to gateway from g729 to ulaw after ib call established. But our Dialogic gateway not support it, how to avoid it?


was (Author: aaron):
I have review the code of asterisk codec negotiation. It seems that this situation is by design. asterisk change the codec sent to gateway from g729 to ulaw. But our Dialogic gateway not support it, how to avoid it?

> asterisk change the codec of inbound channel when bridge to another channel. 
> -----------------------------------------------------------------------------
>
>                 Key: ASTERISK-26339
>                 URL: https://issues.asterisk.org/jira/browse/ASTERISK-26339
>             Project: Asterisk
>          Issue Type: Bug
>      Security Level: None
>          Components: Channels/chan_pjsip
>    Affects Versions: 13.8.0
>         Environment: CentOS6.5x64
>            Reporter: Aaron An
>            Severity: Minor
>
> think about this scenario.
> Alice call in asterisk. Asterisk dialplan answer Alice and then playback "welcome and wait to dial Bob", then dialplan dial Bob. When Bob answer the call and bridge to Alice, the codec of Alice channel read/write direction are not same.
> something like this:
> Alice========Asteriks==========Bob
> -----G729---------->answer
> <----G729-----------playback
>                              dial 
>                                      ----------ulaw-------->
>                                     <--------ulaw---------
> --------G729-------->bridged
> <---------ulaw-------
> this scenario will cause oneway voice on Dialogic Gateway.



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