[Asterisk-Users] SIP lobby phone

[Bill Seddon]

Looking in the draft handbook I can see there is an example in the sample
zapata.conf showing how to setup an fxs channel to behave as a lobby phone
(the attached phone rings an operator as soon as the phone is lifted
off-hook).

There seems to be no equivalent SIP option presumably because a siphone has
to initiate the call.  So can anyone recommend a hardware sipphone that can
be programmed to call an extension when it is lifted off-hook?

I can see that the Grandstream Budgetone supports "Early dial" but it
appears that the user still has to send at least one character.

We could, of course, go and buy an fxs port for asterisk to solve the issue
but since we use sip/iax for our telephony needs currently, that seems a
retrograde step.

Any insights welcome

Bill Seddon