added to wiki. On Wed, Mar 5, 2008 at 9:11 PM, Michael Collins <mcollins@fcnetwork.com> wrote:
Duly noted, and will hopefully put this into the fs book and/or wiki as appropriate...
-MC
-----Original Message----- From: freeswitch-users-bounces@lists.freeswitch.org [mailto:freeswitch- users-bounces@lists.freeswitch.org] On Behalf Of Michael Jerris Sent: Wednesday, March 05, 2008 12:01 PM To: freeswitch-users@lists.freeswitch.org Subject: Re: [Freeswitch-users] Need info on pre_answer app
pre_answer is equivalent to a sip 183 with sdp. It establishes media (early media) but does not answer. You can use this for example to send an in-band error message to the caller before disconnecting them (pre_answer, playback, reject with a cause code of xxxx). That being said, most apps that require media (like playback) should do a pre_answer for you. If you are having an issue with a piece of equipment taking a long time to setup a media path, you could do pre_answer, then sleep in the dial plan.
Mike
On Mar 5, 2008, at 2:45 PM, Jonas Gauffin wrote:
I think that's the same as sending a provisional sip response. It means that FS have received the call request, but it havent reached the destination just yet.
One provisional response is 180 which means Ringing. A final response (200) is sent when the destination user picks up the phone.
guess pre answer can be used if a lenghty process will be used before the destination picks up, to inform the caller to hang on.
But hey, that's just my guess, i havent really been looking in the FS sourcecode about it.
On Wed, Mar 5, 2008 at 8:05 PM, Michael Collins <mcollins@fcnetwork.com
wrote:
Is anybody in a position to update the wiki, or at least shed a bit of light on this subject?
http://wiki.freeswitch.org/wiki/Misc._Dialplan_Tools_pre_answer
Thanks!
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