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

[Daniel Wright]

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

Dan