[Freeswitch-users] Ringback after pre_answer without bridge?

Dmitry Sytchev kbdfck at gmail.com
Tue May 31 15:57:46 MSD 2016

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:


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

What can be done to resolve this? Thanks in advance.

Best regards,

Dmitry Sytchev,
IT Engineer

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