[Freeswitch-users] Ringback after pre_answer without bridge?

Dmitry Sytchev kbdfck at gmail.com
Tue May 31 17:49:09 MSD 2016

Maybe there is also possibility  to start background MOH when there is
no media on channel?

2016-05-31 14:57 GMT+03:00 Dmitry Sytchev <kbdfck at gmail.com>:
> Hi all!
> I'd like to resolve some unclear ringback behavior in early media
> mode. I'm trying to implement ringback while no bridge active.
> A calls FS, FS does something, then searching for B and bridges A to B.
> I'd like to start playing custom ringback immediately after call from
> A gets into FS, not when we start bridge to B.
> I'm doing something like that:
> <action application="set" data="ringback=%(2000, 4000, 440.0, 480.0)"/>
> <action application="set" data="instant_ringback=true"/>
> <action application="set" data="bridge_early_media=true"/>
> <action application="pre_answer"/>
> <action application="sleep" data="10000"/>
> ...
> <action application="bridge" data="some bridge data"/>
> There is no ringback to A in such scenario until bridge is called in
> further dialplan processing. I've tried all combinations of
> ignore/bridge early media, but with no luck. Pre_answer can be called
> directly or by FS when call is recorded, with no difference. There is
> a wiki page that recommends usage of ring_ready:
> https://freeswitch.org/confluence/display/FREESWITCH/mod_dptools%3A+ring_ready
> ring_ready works, but it can give only Ringing to calling side, so  I
> can't pass custom RBT to calling party. It would be enough for me, but
> once somebody calls pre_answer, no early media is passed until bridge
> attempt.
> What can be done to resolve this? Thanks in advance.
> --
> Best regards,
> Dmitry Sytchev,
> IT Engineer

Best regards,

Dmitry Sytchev,
IT Engineer

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