asterisk users - Jul 2006 - extensions.conf 4 digit dialing question

Hi all,
 
Does anyone have any tips on how I would accomplish a plan where if a
user dials 4 digits, then prefix 6 digits, then if there is a local
extension configured for that number dial it, otherwise send it out
another sip gateway ( my pstn gateway)?
 
Perhaps more specifically, are there any construtcs that would "dial
extension if exists"? Because I want to make sure I dial a sip extension
before routing it out to the pstn.
 
~jerry
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I think asterisk will take care of this for you. Asterisk will take the most
complete match in a pattern match. For example if you have a local extension
1234567890 and a pattern match _XXXXXXXXXX then Asterisk will match the
1234567890 to the exact match if it exist, if not then it will got the
closest pattern it can find. Does that make sense or help?

On 7/18/06, Jerry Bonner <Jerry.Bonner@cptelecom.net>
wrote:
>
>  Hi all,
>
>
>
> Does anyone have any tips on how I would accomplish a plan where if a user
> dials 4 digits, then prefix 6 digits, then if there is a local extension
> configured for that number dial it, otherwise send it out another sip
> gateway ( my pstn gateway)?
>
>
>
> Perhaps more specifically, are there any construtcs that would "dial
> extension if exists"? Because I want to make sure I dial a sip
extension
> before routing it out to the pstn.
>
>
>
> ~jerry
>
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-- 
Bruce
Nortex Networks
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On 7/18/06, Jerry Bonner <Jerry.Bonner@cptelecom.net>
wrote:
>
>   Hi all,
>
> Does anyone have any tips on how I would accomplish a plan where if a user
> dials 4 digits, then prefix 6 digits, then if there is a local extension
> configured for that number dial it, otherwise send it out another sip
> gateway ( my pstn gateway)?
>
> Perhaps more specifically, are there any construtcs that would "dial
> extension if exists"? Because I want to make sure I dial a sip
extension
> before routing it out to the pstn.
>
> ~jerry
>
I believe that something like this will do what you are looking for:

[4digitContext]
exten => XXXX,1,goto(checkdids,123456${EXTEN},1) ;Change 1-6 with whatever
the prefix

[checkdids]
;this will try to find a match in 'mydids' before sending out to
'dialout'
include => mydids
include => dialout

[mydids]
;this is the context that houses your DID's.
exten => _8135551212,1,Dial,SIP/whatever
exten => _9195551212,1,Dial,SIP/whatever2

[dialout]
;This will prefix a '1' to the number and make the call.
exten => _XXXXXXXXXX.,1,Dial,SIP/1${EXTEN}@carrier

I believe this should help you.
Good luck,

bp
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