[Asterisk-Users] Can someone explain the 's' extension

[Olle E. Johansson]

Eric "ManxPower" Wieling wrote:
> Neil Cherry wrote:
> 
>> Does someone explain the 's' extension? In the Wiki it says it's
>> the catch all extension. In the Asterisk 1.2-rc1 it say it isn't
>> but doesn't say anything more. Needless to say I'm confused.
> 
> 
> When a call comes into Asterisk (PSTN, VoIP, etc) and call has NO
> information as to what extension to route to then Asterisk will try
> sending the call to extension => s
> 
> In practice this only happens if you have a voice T-1 (Not PRI) with no
> DIDs, or if you have an analog FXO port.
> 
Or if we receive a SIP uri with no username part.

It's not a catch-all. It's a replacement for nothing.

Macros always start on the "s" extension.

/O