[Asterisk-Users] s or _X. , is there any change since Asterisk 1.2

[Zeeshan]

Hi,

Before Asterisk 1.2 release, s extension never worked for my sip phone
and I had to catch calls in my [incoming] using _X. but today after
installing Asterisk 1.2, extension s is doing the same thing what _X.
used to do. My understanding was that s extension was good only for FXO.
Is there any change in its behavior since 1.2 that it is treating calls
incoming on sip same as incoming on FXO. If so, which extension should
be used and why? I am totally confused.

Thanks

Zeeshan A Zakaria