[asterisk-users] Matching *, + and # in the dialplan

[Olivier]

2008/10/17 John Todd <jtodd at digium.com>

> At 5:46 PM +0200 2008/10/16, Olivier wrote:
> >
> >Is Incomplete() application an acceptable work around for ISN ?
> >
>
> It is impossible to determine the full sequence of digits for an ISN
> number ahead of time (well, I shouldn't say "impossible" because one
> could create a really nasty hack...) because the number of digits
> isn't known until the user indicates they are done dialing.  To
> determine if the subscriber and/or the ITAD are valid, one must
> perform a lookup and possibly a connection attempt to the remote
> system for determination.
>
> Both the subscriber number (the stuff to the left of the "*") and the
> ITAD number (the stuff to the right of the "*") are not bounded by a
> particular pattern.  Therefore, it is not reasonable to create
> regexps other than "does this string contain at least one but maybe
> more digits, followed by the "*" sign, followed by at least one but
> maybe more digits".
>
> So, 1234*256 is a valid ISN sequence, as is 12345*2567.  (Though only
> the first one of the two is actually active at the moment.)
>
> See http://www.freenum.org/ for more details on what makes up an ISN.
> It's free to participate, and Asterisk incorporates ISN-style dialing
> as a default in the ENUMLOOKUP routines.  Accepting inbound calls is
> easy as well - it's just SIP inbound calling, no magic there.
>
> JT


Writing this :

exten => _XXX*,1,Incomplete()
exten => _XXXX*,1,Incomplete()
exten => _XXXXX*,1,Incomplete()

would work to catch 3 to 5 digits private extensions, but it would remains
difficult to catch the ITAD number, right ?



>
>
> --
> John Todd
> jtodd at digium.com        +1-256-428-6083
> Asterisk Open Source Community Director
>
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