[Asterisk-Users] extensions and regular expressions ( probablyan easy question )

[Ryan Burke]

I was reading the pdf and found a command that might be of some use: 
Prefix()

ex.

exten => 8661234567,1,Prefix(1)
exten => 18661234567,1,NoOp()
exten => 18661234567,2,Goto(800-in)

After the Prefix() the the next exten is n+1 (which is 2 in this example) 
with the new extension (which is 18661234567 instead of 8661234567 which was 
originally dialed).

Personally I think this is a bit more elegant than having a bunch of Goto's 
for each extension, but they do the same thing. Personal preference I guess.

Ryan

----- Original Message ----- 
From: "Rich Adamson" <radamson at routers.com>
To: "Asterisk Users Mailing List - Non-Commercial Discussion" 
<asterisk-users at lists.digium.com>
Sent: Saturday, December 10, 2005 7:08 PM
Subject: Re: [Asterisk-Users] extensions and regular expressions ( 
probablyan easy question )


> Or, just do...
> exten => 18661234567,1,Goto(800-in)
> exten => 8661234567,1,Goto(800-in)
>
> It's kind of tough to truly understand what you are trying to accomplish
> (or ask for). Apparently you've got something more in mind that words are 
> making it through the list. Reading between the lines, it would appear 
> from the 800-in that calls are coming in from some external source, and 
> you trying to do something with them. Can you be a little more explicit.
>
>
>
>> Hi Dan,
>>
>> Thanks for the info, but what I'm after is the ability to match a 
>> digit/character 0 or 1 times at the beginning of the string.  If I'm 
>> reading your example right, it'll match anything starting with 866, which 
>> doesn't work for me.  I am trying to match:
>>
>> 18661234567 and 8661234567
>>
>> Sean
>>
>> ps:  The pdf doesn't have a good explaination of this either, although it 
>> occurs to me that this might not be possible with * if I'm having such a 
>> hard time finding it.
>> Daniel Wright wrote:
>>
>>> Sean Kennedy wrote:
>>>
>>>> Hi all,
>>>>
>>>> I'm having a hard time finding information related to the regular 
>>>> expressions that can be used in a dialplan, specifically as an 
>>>> extension.  For example, I have an 800 number which I'd like to jump 
>>>> directly to if my users dial it, instead of going over my pstn 
>>>> termination.  Currently, it looks like this:
>>>>
>>>> exten => 8661234567,1,Goto(800-in)
>>>>
>>>> However, I'd like 1866123456 to match as well.  I can't find in the 
>>>> wiki or sample configs how to say "match this 0 or 1 times".
>>>> Can anybody provide a link that would go over this?  Again, I've been 
>>>> digging through the wiki, but I seem to be missing it.
>>>>
>>>> Thanks
>>>>
>>>> Sean
>>>>
>>> You could do it like this:
>>>
>>> exten => _866.,1,GoTo(800-in)
>>>
>>> The period means match one or more characters.
>>>
>>> You can find reference to expressions and how they work  in this pdf 
>>> book http://www.nufone.net/downloads/asteriskdocs/AsteriskTFOT.zip
>
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