[asterisk-users] weird undocumented extensions such as s-BUSY

[Trevor Peirce]

Barzilai Spinak wrote:
> I've seen several examples that use extensions such as;
> s-BUSY
> s-NOANSWER
>
> etc...
>
> It's more or less evident what they do, but I've searched for some 
> FORMAL documentation everywhere and have found nothing.
> Do they work for anything else than "s-"? (I think I've seen other 
> examples, but can't find them now)

Yes.
> Are they standard in any way?
I'd say no, but it depends how you look at it.
> What are the allowed values after the dash?
Any potential value of ${DIALSTATUS}
> In which version were they introduced?
Not sure, but they are just various destinations for a jump caused by 
Goto(s-${DIALSTATUS})

asterisk doesn't know about and doesn't care about these extensions; 
there is nothing special about them and that's why you can't find any 
documentation.

HTH,
Trevor