 [2] Required
Notes:
 The Supported and Required headers contain the '100rel' tag.
 The device sends PRACK messages if 180/183 responses are
received with '100rel' in the Supported or Required headers.
Web/EMS: Enable Early
Media
[EnableEarlyMedia]
Enables the Early Media feature.
Enables the device to send a 183 Session Progress response with SDP
instead of a 180 Ringing, allowing the media stream to be established
prior to the answering of the call.
 [0] Disable (default)
 [1] Enable
Notes:
 To send a 183 response, you must also set the parameter
ProgressIndicator2IP to 1. If it is equal to 0, 180 Ringing response is
sent.
 This feature can also be configured as an IP Profile and/or Tel
Profile.
Web: 183 Message
Behavior
EMS: SIP 183 Behaviour
[SIP183Behaviour]
Defines the response of the device upon receipt of a SIP 183 response.
 [0] Progress = (Default) A 183 response (without SDP) does not
cause the device to play a ringback tone.
 [1] Alert = 183 response is handled by the device as if a 180 Ringing
response is received, and the device plays a ringback tone.
Web: Session-Expires
Time
EMS: Sip Session Expires
[SIPSessionExpires]
Defines the numerical value sent in the Session-Expires header in the
first INVITE request or response (if the call is answered).
The valid range is 1 to 86,400 sec. The default is 0 (i.e., the Session-
Expires header is disabled).
Web: Minimum Session-
Expires
EMS: Minimal Session
Refresh Value
[MinSE]
Defines the time (in seconds) that is used in the Min-SE header. This
header defines the minimum time that the user agent refreshes the
session.
The valid range is 10 to 100,000. The default value is 90.
Web/EMS: Session
Expires Method
[SessionExpiresMethod]
Determines the SIP method used for session-timer updates.
 [0] Re-INVITE = (Default) Uses Re-INVITE messages for session-
timer updates.
 [1] UPDATE = Uses UPDATE messages.
Notes:
 The device can receive session-timer refreshes using both methods.
 The UPDATE message used for session-timer is excluded from the
SDP body.
[RemoveToTagInFailureR
esponse]
Determines whether the device removes the ‘to’ header tag from final
SIP failure responses to INVITE transactions.
 [0] = (Default) Do not remove tag.
 [1] = Remove tag.
[EnableRTCPAttribute]
Enables the use of the 'rtcp' attribute in the outgoing SDP.
 [0] = Disable (default)
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