[Sip] Standard mechanism to instruct the phone go off hook

["Snyder, Duke" <Duke.Snyder@xxxxxxxx>]

Has any work been done to have a standard mechanism for an application to request that the phone answer it's "alerting" call by going off hook (to speaker mode).   Currently, different hard IP phones have a different ways to "auto-answer", but it complicates SIP development working with proprietary, non-SIP techniques.   The PhoneControl draft (http://www.cs.columbia.edu/~hgs/sip/drafts/draft-dean-phonectl-03.txt) seems to do some phone control, but not the auto-answer request.

Common scenarios for this request:
*	A call center agent typically uses auto-answer for his call center calls.  His SIP app (based off his configuration) could send the call to his phone (with a headset), request that the phone answer the call, and the agent handles the call completely hands-free.
*	A call center supervisor selects a call to monitor.  His SIP app will direct the audio of the call to his phone, but first must call his phone to establish an audio path.  Again, typically the supervisor would like the phone to automatically go off hook rather than forcing him to answer the phone.

Authentication would need to be used since most people would not want their SIP phone in their bedroom to go off hook.


Duke Snyder
Interactive Intelligence, Inc.
www.inin.com




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