You could do this by including a certain value in a header/parameter. So in normal circumstances, the phone would ring - else if the required value is present - auto-answer.
Chris. >-----Original Message----- >From: Christer Holmberg [mailto:[EMAIL PROTECTED] >Sent: 02 April 2003 11:15 >To: Roman Shpount >Cc: [EMAIL PROTECTED] >Subject: Re: [Sip-implementors] Force Offhook > > >Hi, > >> Is there a standard way in which to send an INVITE message to an end >point to force it to accept the call without ringing? This INVITE is needed >to force the business desktop phone off-hook. If the phone has a speaker >phone, it should be activated. This will allow implementation of standard >PBX intercom/paging services using SIP phones. > >I guess you will have to implement your phone so that it automatically >answers the call and sends 200 OK... > >Regards, > >Christer Holmberg >Ericsson Finland > > >_______________________________________________ >Sip-implementors mailing list >[EMAIL PROTECTED] >http://lists.cs.columbia.edu/mailman/listinfo/sip-implementors _______________________________________________ Sip-implementors mailing list [EMAIL PROTECTED] http://lists.cs.columbia.edu/mailman/listinfo/sip-implementors
