[Freeswitch-users] how do I detect a call has rung once?

[Anthony Minessale]

Unfortunately it's not an assumption.

You have to consider that things are sane.  If they are.  When you place a
call and you get either a 180 or 183 it denotes that ringing has been
indicated by the far end.  If you want to get into the gory details they map
over to a very specific set of ISDN signals that indicate that the phone has
rung or not both with and without media.  In either case both with and
without audio if FreeSWITCH gets the early media indication it means someone
has told us there is ringing.

If things are not sane, you cannot do anything but find another route.





On Mon, May 10, 2010 at 4:34 PM, Sergey Okhapkin
<sos at sokhapkin.dyndns.org>wrote:

> Unfortunately this is a wrong assumption. You can get dead air in early
> media
> and SIP error after that.
>
> On Monday 10 May 2010, Anthony Minessale wrote:
> > as soon as you get the first early media signal, that is how you know.
> >
> > On Mon, May 10, 2010 at 4:03 PM, Neil Patel <neilp at cs.stanford.edu>
> wrote:
> > > I want to initiate a missed call from FS (via lua script). Is there
> > > anything in the early media I can check to see that the call has rung
> at
> > > the endpoint at least once?
> > >
> > > Thanks,
> > > Neil
> > >
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-- 
Anthony Minessale II

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