[Asterisk-Users] Asterisk in parallel with PSTN

[Alexander Lopez]

As per Caleer ID spec. Caller ID info is tranmitted between first and
second rings. This is to allow the phone to 'wake up' and receive the
Caller ID information. If you were to pick up the phone right before it
rang the first time or shortly after the first ring stopped you will not
get caller id.



-----Original Message-----
From: asterisk-users-bounces at lists.digium.com
[mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of Dorn
Hetzel
Sent: Thursday, December 23, 2004 5:15 PM
To: Asterisk Users Mailing List - Non-Commercial Discussion
Subject: Re: [Asterisk-Users] Asterisk in parallel with PSTN


I've got a configuration with PSTN line connected to FXO
on TDM400P ringing through to a phone connected on a
Sipura SPA-3000.  The phone *does* ring before the
caller-id is available.  In fact, it shoes some 
alternate message like "waiting for caller id info"
right after the first ring and then changes to
the real caller-id after the 2nd ring.

-Dorn

On Thu, Dec 23, 2004 at 03:44:14PM -0500, Steve Prior wrote:
> Andrei (MPI) wrote:
> 
> >richard wrote:
> >>Asterisk also ring (so that all three of them are ringing), and then

> >>someone can then choose which phone they want to answer?
> >
> >
> >Hi Richard,
> >
> >Absolutely, you can do that with Asterisk. Though VoiP telephone 
> >(Asterisk) may start ringing a second later than analog phones
connected 
> >to the line directly. I do not think that would be a problem.
> 
> I believe you should note that if Asterisk is configured for callerid
> that the SIP phone won't ring until your non-Asterisk phones have rung
> twice.  This is because Asterisk gets the CID before it passes the
call
> through.  I'd like to be wrong about this, but I believe that's what
I've
> been told.
> 
> Steve
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