[asterisk-users] extending fallback numbers

[Phil Frost]

On 04/02/2012 08:35 PM, Warren Selby wrote:
> On Mon, Apr 2, 2012 at 7:05 PM, Paolo Supino <paolo.supino at gmail.com 
> <mailto:paolo.supino at gmail.com>> wrote:
>
>     Hi
>
>     A couple of weeks ago I asekd how to setup a fallback numer and one of
>     the reply I received was to se GotoIF and ${DIALSTATUS}.
>     I succeeded in making it work for a single fallback number (i.e. the
>     operator), but I want to extend it in the following manner:
>
>     2000-2099 -> fallback to 2000
>     2100-2199 -> fallback to 2100
>
>
>
> The simplest way is to just use pattern matching and multiple Dial 
> statements in consecutive order, like so:
>
> exten => _20XX,1,Dial(SIP/${EXTEN},30)
> exten => _20XX,n,Dial(SIP/2000,30)

It's also worth noting that you can provide priority 1 in one extension, 
and then fall through to more general priorities in a more general 
context. For example,

exten => 2011,1,NoOp(2011 ${EXTEN})
exten => _20XX,2,NoOp(_20XX ${EXTEN})