[asterisk-users] {s} - extension

[Noah Miller]

Hi -

> Thank you all for answers. As I understand s - i and others is device specific.
>  I will not need them in my SIP configuration.

The "s" extension is not zap-specific.  You can use it for any type of
device.  It's just the generic extension that a call will go to when
no other matching extensions are present.  As Tzafrir pointed out, you
had no "s" extension in the default context, and your sip device was
in the default context.  Therefore, you were only able to dial
extensions that you had explicitly declared.

To access the "s" extension from your sip device, you'd either need to
add your sip device to the context where your "s" extension is, or
include that context in the default context.

NOTE: Andres' example using "_." will work, too (but you should make
sure you put in at the end of a context if you want to put other
extensions in that context as it will match all calls).


- Noah



>
>
>  2008/3/5, Andres Jimenez <gandresin at gmail.com>:
>
>
> > On Wed, Mar 5, 2008 at 1:36 PM, Tzafrir Cohen <tzafrir.cohen at xorcom.com> wrote:
>  >
>  > >  This is not needed. If the extension is not found, there is a
>  > >  fallthrough to 's' (Right? Or is it chan_zap-specific)?
>  >
>  > I would say it's chan_zap-specific.
>  >
>  > From http://www.voip-info.org/wiki/index.php?page=Asterisk+config+extensions.conf
>  >
>  > "For some kinds of connections — such incoming calls from an outside
>  > telephone line — the user has not dialed an extension. In that case,
>  > Asterisk behaves as if the user had dialed a special extension named
>  > "s" (for Start). Asterisk will look for an extension "number" s in the
>  > definition of the context for that channel for instructions about what
>  > it should do to handle the call. "
>  >
>  > The key factor is that "s" is used when NO EXTENSION has been
>  > specified (when the call is not clearly directed to an specific
>  > number). As far as I know, that's the way analog lines behave. The
>  > line just receives the call, but no information says to which number
>  > the call was sent.
>  >
>  >
>  > --
>  > Andres Jimenez
>  >
>  > GPG : http://www.andresin.com/gpg/gandresin@gmail.com.asc
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