[asterisk-users] Modification of Caller ID based on context

[arkda]

Nice solution Eric, thanks. Very elegant.

On 6/27/07, Eric ManxPower Wieling <eric at fnords.org> wrote:
>
> Matthew Brothers wrote:
> >> Hi,
> >>
> >> I have been looking for an example of accomplishing this, but
> >> I've been unable to locate something similar to what I'm trying
> >> to do.
> >>
> >> Here's the scenario:
> >>
> >> Users caller ID is set to their internal extension (200-250).
> >> This is set in sip.conf for each user. Each user has a local DID
> >> as well (hosted through Vitelity, for example (555)111-2222). The
> >>  problem is that this extension was being passed to the outside
> >> world. I currently have a SetCallerID command changing the
> >> CallerID to our main office number, but some users want their DID
> >>  sent, not the general number.
> >>
> >> The problem is that if their caller ID is set to their DID, when
> >> users hit redial on their phones internally they dial out and
> >> back in. I corrected this by putting each DID in extensions.conf
> >> under their three digit extension, but that seems a bit like a
> >> kludge obviously.
> >>
> >> I'm looking for a method of sending the internal three digit
> >> extension only when a user is dialing another user internally,
> >> otherwise it will send their DID. Is their a method to do this in
> >>  the dial plan? Anyone have an example of how to accomplish this?
> >>
> >>
> >> Thanks in advance.
> >
> >
> > Mike,
> >
> > I have a similar setup (I even use Vitel) and the easiest and
> > cleanest method that I have found to accomplish this is with the
> > AstDB. You can simply create a cross-reference of DIDs and Internal
> > extensions similar to extdid/200 => 5551112222 ... extdid/250 =>
> > 5551112272 in the AstDB. Then you can change your outgoing dialplan
> > to change the caller id based upon this cross reference. Example:
> >
> >
> > exten => NXXNXXXXXX,n,Set(outgoingCID=<MAINNUMBER>)
> >
> > exten => NXXNXXXXXX,n,
> > GotoIf($[ ${DB_EXISTS(extdid/${CALLERID(num)})} = 0 ]?makecall)
> >
> > exten => NXXNXXXXXX,n,
> > Set(outgoingCID=${DB(extdid/${CALLERID(num)})})
> >
> > exten => NXXNXXXXXX,n(makecall),Set(CALLERID(num)=${outgoingCID})
> >
> > ...
> >
> > You could even simplify your incoming context by cross-referencing
> > in the other direction. That is didext/5551112222 => 200 ...
> > didext/5551112272 => 250.
> >
> > exten => NXXNXXXXXX,n,
> > Goto(internal-extensions,${DB(didext/${EXTEN})},1)
> >
> > OR you could do something similar with LOCAL channels or with a Dial
> > command.
>
> Here is my solution.  I've stripped out most of the unimportant stuff.
>
> Because our carrier charges for PICs on a per-DID basis, we set the
> Caller*ID number for long distance calls to be the main number,
> regardless of what the person's DID is.   It also allows use of more
> than one main number, depending on the device making the call.
>
> The macro-dial-result is not important for this.  It is a macro we use
> to figure out what happened to the call based on HANGUPCAUSE and what,
> if any tone or message to send the caller, as well as decide if the call
> failed and should be sent out a different route.
>
> In sip.conf set up the device like this:
>
> [0004f201e570-a]
> callerid=Room, Computer <3726>
> setvar=DID=9852463726
> setvar=BTN=9858982022
> accountcode=3726
> type=friend
> host=dynamic
> secret=Shhhh
> context=toll-access
>
> My extensions.conf looks like this:
>
> [toll-access]
> ;
> ; 9-1-nxx-nxx-xxxx
> exten => _91NXXNXXXXXX,1,Set(USE_BTN=yes)
> exten => _91NXXNXXXXXX,n,Gosub(outgoing-call-fixup,${EXTEN},1)
> exten => _91NXXNXXXXXX,n,Dial(${PSTN}/${EXTEN:1},,g)
> exten => _91NXXNXXXXXX,n,Macro(dial-result,SIP/${EXTEN}@pinhook)
> ;
> ; 9-1-985-nxx-xxxx
> exten => _91985NXXXXXX,1,Gosub(outgoing-call-fixup,${EXTEN},1)
> exten => _91985NXXXXXX,n,Dial(${PSTN}/${EXTEN:1},,g)
> exten => _91985NXXXXXX,n,Macro(dial-result,SIP/${EXTEN}@pinhook)
>
> [outgoing-call-fixup]
> ;
> exten => _X.,1,GotoIf($[${LEN(${CALLERID(num)})} != 10]?check-btn)
> exten => _X.,n,Return
> exten => _X.,n(check-btn),GotoIf($["${USE_BTN}" = "yes"]?set-btn)
> exten => _X.,n,Set(CALLERID(num)=${DID})
> exten => _X.,n,Return
> exten => _X.,n(set-btn),Set(CALLERID(num)=${BTN})
> exten => _X.,n,Return
>
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