[cisco-voip] Remove Caller ID Delay

David Zhars dzhars at gmail.com
Fri May 15 12:03:07 EDT 2009


Hey everyone!

Good ideas all around.  I get Caller ID from the Telco (I have it enabled on
the lines) it rings into an FXO on a 2801.  Then of course it is PLARd over
to CCM so it can then ring the proper phone or phones.  I have disabled
callerID on the 2801 in H323 mode, but that seemed to make zero difference.

I am thinking there isn't anything I can do!  It seems to be either a telco
thing (providing the first imaginary ring to provide comfort to the caller
that the call is going through while the telco determines how to route it)
or its the FXO handing off to CCM.  All of my reading says there is no way
to change the 1 ring the FXO uses to hand off to CCM.

If you know of any other tricks I'd be happy to hear them!

Thanks!

David

On Thu, May 14, 2009 at 12:36 PM, Wes Sisk <wsisk at cisco.com> wrote:

>  Not really.
>
> Part of the ring heard by the external party is what is referred to as
> "gratuitous ringback".  This is time for the PSTN to do call routing to
> destination.
>
> After that the FXO port must wait up to 2 seconds to receive callerid from
> your telco.  You can disable the reception of callerid and have the call
> routed immediately but then you would not receive callerid.
>
> /Wes
>
>
> On Thursday, May 14, 2009 12:18:50 PM, David Zhars <dzhars at gmail.com><dzhars at gmail.com>wrote:
>
> CCM 4.1.3, H323 2801, FXO ports.
>
> People call in, they will hear 1.5 rings before we hear any rings.  I
> assume this is setting up Caller ID.  Anyway to stop this, just let the
> phone ring before Caller ID is transmitted?
>
> thanks.
>
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