This is really not a protocol issue, but a vendor programming issue. It all depends on if you can get the hardware to do a hotline call when the phone is taken off the hook.
JT
Does anyone know if this can be done by any VoIP Technology (SIP, IAX, IAX2 or MGCP) I don't know the protocols!
On Tue, 2003-03-18 at 09:56, Steven Critchfield wrote:On Tue, 2003-03-18 at 09:04, Don Pobanz wrote: > We have need of a ringdown circuit in an elevator. If someone picks up > the phone, it should dial another extension without any keys being > pressed. (There are no keys on the phone) > > If it was an incoming call to asterisk, the following lines in > extensions.conf would do the trick. > exten => s,1,Answer > exten => s,2,Dial,Zap/10 > > However, the 's' state is not valid for just picking up a phone > (extension). With nothing being dialed there are no extension matches > to make. It is like the dial tone needs to time out in a very short > time and instead of getting the busy tone, asterisk should dial an > extension.
in /etc/asterisk/zapata.conf, I think this is what you are looking for. ; ; Specify whether the channel should be answered immediately or ; if the simple switch should provide dialtone, read digits, etc. ; immediate=no
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