[asterisk-users] Checking status of a cell phone

[Gilles]

On Mon, 28 Mar 2011 14:12:09 +0200, <magnus.b at inputinterior.se> wrote:
>Its not the Avaya that makes the call back, it is mobile.

I thought the way you handled things, is that Asterisk would call your
cellphone through the Avaya PBX just to check whether the cellphone is
in_use/busy. At what point does the cellphone call Avaya or Asterisk
back?