Version 5.8 253 September 2009
SIP User's Manual 6. Configuration Parameters Reference
6.7 SIP Configuration Parameters
This subsection describes the device's SIP parameters.
6.7.1 General SIP Parameters
The general SIP parameters are described in the table below.
Table 6-29: General SIP Parameters
Parameter Description
Web/EMS: PRACK Mode
[PrackMode]
PRACK (Provisional Acknowledgment) mechanism mode
for 1xx SIP reliable responses.
 [0] Disable
 [1] Supported (default)
 [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 device to send a 183 Session Progress
response with SDP (instead of 180 Ringing), allowing the
media stream to be established prior to the answering of
the call.
 [0] Disable = Early Media is disabled (default).
 [1] Enable = Enables Early Media.
Note that 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.
Web: 183 Message Behavior
EMS: SIP 183 Behaviour
[SIP183Behaviour]
Defines the response of the device upon receipt of a SIP
183 response.
 [0] Progress = A 183 response (without SDP) does not
cause the device to play a ringback tone (default).
 [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]
Determines the numerical value that is 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.
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