[Asterisk-Users] s, h, t, etc, extensions?

[Andrew Kohlsmith]

> I'm in the process of reworking my dialplan to include an ivr and
> other items. I've seen several examples over the last several months
> that mention the "s", "h", "t" (and probably others) extensions, but
> I don't fully understand what they are used for. Can someone either
> give a short definition of each or point me towards some doc?

s = start
h = hangup
t = timeout

start is where the dialplan starts when no extension is given.  hangup and 
timeout are pretty self-explanatory; they are where the dialplan jumps to 
on hangup or timeout, respectively.

Regards,
Andrew