Specifications

Administrator's Manual 22. Supplementary Services
22.6 Configuring Automatic Answer
The Automatic Answer feature is configured using the Configuration File parameters
described in the table below.
Table 22-5: Automatic Answer Parameters
Parameter Description
voip/auto_answer/enabled
Enables the Automatic Answering feature.
 [0] Disable (default)
 [1] Enable
When this parameter is enabled and an incoming SIP INVITE
message is received containing information that informs the
IP phone to automatically answer the call, the phone answers
the call immediately or after a timeout, depending on the auto-
answer type specified in the INVITE message:
 Phone answers after a timeout: The phone automatically
answers the call after a timeout if the INVITE message
includes a SIP Call-Info header with a tag value, "answer-
after=" set to a number representing the timeout. During
the timeout interval, the phone rings normally. If the call is
answered or rejected during this interval, then the
automatic answering mechanism is not used. However, if
the phone is left to ring throughout the timeout interval, it
automatically answers the call once this timeout expires.
 Phone answers immediately: The phone answers the
call immediately in any of the following cases:
 If the SIP Alert-Info header contains the tag value, "ring
answer".
 If the SIP Alert-Info header contains the tag value,
"info=alert-autoanswer".
Notes:
 If the SIP Call-Info header includes all the above answer
types or any two different types (i.e., “answer-after=”, “ring
answer”, and “alert-autoanswer”), the answer-after= type
takes precedence.
 If there is an existing call when an INVITE message for
automatic answer is received, the existing call is
automatically put on hold.
voip/talk_event/enabled
Enables the "talk" event feature.
 [0] Disable (default)
 [1] Enable
The phone automatically answers an incoming call if it
receives a SIP NOTIFY message with the "talk" event. If a call
is already in progress, the call is put on hold and the incoming
call is answered.
Version 2.0.0 141 October 2012