mgetty caller id

Gert Doering (gert@greenie.muc.de)
Sun, 17 Oct 1999 20:30:11 +0200


Hi,

getting the Specs for this would be really nice, yes.  I didn't 
actually write the comment about Bell Canada (German caller ID works
differently altogether...), but will happily rephrase it if I can
get detailed Specs what's actually going on...

gert


On Sun, Oct 17, 1999 at 03:08:40PM -0300, Christian Taylor wrote:
> In poking in the mgetty source, I came across the part in cnd.c that
> describes the Bell Canada way of doing Caller ID.  You describe it as
> being non-standard, but it's not at all.  If you read up on the caller id
> spec, you'll see that it's exactly the same as in the US.  With caller id,
> MESG contains what type of call it is, and the number.  The first byte
> describes the call.  Every two digits in the long string sent back by the
> modem in MESG is one byte (in hex, which is why there are all the 3's in
> the phone number... 0x30 = 0, 0x31 = 1, 0x32 = 2, etc...).  The first byte
> (0x03, for canada) indicates a normal call where the caller ID information
> is available.  In the US, this is 0x04, and the Rockwell chipset sees
> this, and properly decodes the number, and you never see the long cryptic
> MESG string.  But it doesn't understand that Canada uses 0x03, so it just
> reports the entire MESG string, because it doesn't know what to do.
> 
> I hope that makes sense.  I'll try to find the URL to the document that
> describes all this in detail.  Just wanted to clear this up.
> 
>  -Christian
> 
> --                              
> Christian Taylor
> 50% Quake.AcadiaU Admin :-)
>    WWW: http://www.phazer.org/
> E-mail: 029759t@dragon.acadiau.ca
>    ICQ: 3240630
> 
> 

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Gert Doering - Munich, Germany                             gert@greenie.muc.de
fax: +49-89-35655025                        gert.doering@physik.tu-muenchen.de