[asterisk-users] Changing CALLERIDNUM on the fly

[Anselm Martin Hoffmeister]

Am Dienstag, den 19.12.2006, 01:11 -0500 schrieb Doug Crompton:
> Is what I am trying to do in this context possible. That is changing the
> incoming CALLERIDNUM. In this case if the incoming CALLERIDNUM is not
> preceeded by a "1" I want to add a "1". Often calls come in without the
> preceeding "1" and this plays havoc with my redial if the 3 digit area
> code matches a local 3 digit extension. All my outside calls are 10 digits
> or 1+10 digits.
> 
> Doug
> 
> 
> [from-pstn]
> exten => s,1,set(TEST=${CALLERIDNUM::1})    >>>> test for first digit1
> exten => s,2,GotoIf($[ ${TEST} = 1 ]?4:3)
> exten => s,3,set(__CALLERIDNUM=1${CALLERIDNUM})  >>>> if not add 1
> exten => s,4,noop(${CALLERIDNUM})  >>>>> and this still displays without

Replace CALLERIDNUM with CALLERID(num) on all occasions, and you will
not need underscores because this is a special variable anyway.
CALLERIDNUM is obsolete.

You could get along with one line less:
exten => s,1,GotoIf($[A${CALLERID(num):0:1} = A1]?3:2)
exten => s,2,Set(CALLERID(num)=1${CALLERID(num)})
exten => s,3,NOOP(Continue in Dialplan)

Note that my GotoIf contains the two additional "A" letters which is
important to avoid syntax errors if the CALLERID(num) is empty for
whatever reason. I do not know what ends up in your CALLERID(num) if the
number of the caller is not available (like "anonymous" or "withheld") -
anyway, with this statement it will end up being prepended by "1". You
migth want to have a special case for that.

If your phones happen to also display CALLERID(name) you can use this to
lookup the phone number in a phone book (here in Germany there is an
online service for number reverse lookup which works for about 50% of my
callers) and set the variable.

BR
Anselm