asterisk users - Jan 2006 - dialing 2 channels at the same time with different caller ID number?

> > -----Original Message-----
> > From: asterisk-users-bounces@lists.digium.com
> > [mailto:asterisk-users-bounces@lists.digium.com] On Behalf Of
> > Damon Estep
> > Sent: Sunday, January 29, 2006 11:09 PM
> > To: Asterisk Users Mailing List - Non-Commercial Discussion
> > Subject: [Asterisk-Users] dialing 2 channels at the same time
> > with differentcallerID number?
> >
> >
> > Can anyone think of a way to dial 2 different numbers at the
> > same time, but set the callerID number differently for each channel?
> >
> > The application is a simultaneous ring of an office extension
> > and a cell phone where the user wants to know that the call
> > to the cell phone is a redirected call from the office.
> >
> >
> > Maybe the use of a "local" channel with changed caller ID
> > behavior as the second channel dialed?
> >
> > To add additional complexity, I need to be able to pass an
> > argument to a macro to enable/disable this "feature"
> >
> > TIA
> >
> > Damon
> Alex Lopez says
> You can then call up the macro like this:
> 
> [extensions]
> Exten => 1120,1,Macro(call-cell,SIP/120,Local/120@cellular)
> Exten -> 2120,1,Macro(call-cell,SIP/120)
> 
> [macro-call-cell]
> Exten => s,1,Dial($ARG1&ARG2)
> 
> [cellulars]
> Exten => 120,1,Set(CALLERID(num)=5555551212)
> Exten => 120,2,Dial(Zap/g2/8002MYCELL)
That looks like it would work with a hard coded extension, but it is not
scalable due to the requirement of hardcoding every cell phone number
that could be used as an alternate number.

I am looking for a solution to do this via a macro where the alternate
number is looked up in a database.

I think this requires the ability to set/read a channel variable that
contains the originally dialed number as follows;

[inbound]
;calls start here
<snip>
Steps here recall the alternate number for the dialed extension from
mysql using realtime() and assign the value to the variable ${cellphone}
<snip>
exten =>
_NXXNXXXXXX,2,dial(sip/${EXTEN}&local/${cellphone}@alternate1/n,r}

[alternate1]
exten =>
_NXXNXXXXXX,1,macro(alternate-number|${SOME_VARIABLE_THAT_REFLECTS_ORIGI
NALLY_DIALED_NUMBER})

[macro-alternate-number]
exten => s,1,set(CALLERID(number)=${ARG1})
exten => s,2,dial(SIP/${MACRO_EXTEN}@peer)

Any ideas on how to get the originally called number to the context used
for the local channel dial?

The goal is to set the caller ID on the local channel dial to the number
that the inbound caller originally dialed (${EXTEN} in the [inbound]
context]), while maintaining the original caller ID on the SIP channel
dial.

Damon