[asterisk-users] Dahdi/callerid issue

[Tzafrir Cohen]

On Mon, Jan 18, 2010 at 07:15:28PM +0000, Gordon Henderson wrote:

> Dutch caller ID - it's weird. Seems to be transmitted in DTMF before the 
> line rings, so answering it isn't going to help at all, and by the time 
> you get the ring, it's too late anyway.
> 
> I can't find anything definitive (and am not going to look more), but 
> searching found this:
> 
>    http://www.ainslie.org.uk/callerid/cli_faq.htm
> 
> which led to this - which is for the Danish system, but it suggests it's 
> not too different from the Dutch system.
> 
>    http://www.blichfeldt.dk/faq/clip.htm
> 
>    "The Danish implementation of CLIP uses simple DTMF-signalling,
>    transmitting the A-subscriber number (from the exchange) to the
>    B-subscriber, just before ringing."
> 
> I'd start by looking at the configs and making sure you have the correct 
> settings in the configs to make sure the line impedances, etc. are set 
> right for you.

Interesting. If this were the case, Wait() should have had no effect.

-- 
               Tzafrir Cohen
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