SIP User's Manual
700
Document #: LTRT-12804
Mediant 800 MSBG
Parameter
Description
set the parameter ProgressIndicator2IP to 1. If it is equal to 0, 180
Ringing response is sent.
For Digital interfaces: Sending a 183 response depends on the ISDN
Progress Indicator (PI). It is sent only if PI is set to 1 or 8 in the received
Proceeding or Alerting PRI messages. For CAS protocol, see the
ProgressIndicator2IP parameter.
Note
s
:
You can also configure early SIP 183 response immediately upon
receipt of an INVITE, using the EnableEarly183 parameter.
This parameter can be configured per IP Profile, using the IPProfile
parameter (see ''Configuring IP Profiles'' on page
) and per Tel
profile, using the TelProfile parameter (see ''Configuring Tel Profiles''
on page
).
Web/EMS: Enable Early
183
[EnableEarly183]
Determines whether the device sends a SIP 183 response with SDP to
the IP immediately upon receipt of an INVITE message (for IP-to-Tel
calls). The device sends the RTP packets only once it receives an ISDN
Progress, Alerting with Progress indicator, or Connect message from
the PSTN.
[0]
Disable (default)
[1]
Enable
For example, if enabled and the device receives an ISDN Progress
message, it starts sending RTP packets according to the initial
negotiation without sending the 183 response again. Therefore, this
feature reduces clipping of early media.
Notes:
To enable this feature, configure the EnableEarlyMedia parameter to
1.
This feature is applicable only to ISDN interfaces.
Web: 183 Message
Behavior
EMS: SIP 183 Behaviour
[SIP183Behaviour]
Digital interfaces: Defines the ISDN message that is sent when the 183
Session Progress message is received for IP-to-Tel calls. Analog
interfaces:Defines the response of the device upon receipt of a SIP 183
response.
[0]
Progress = Digital interfaces: The device sends a Progress
message. Analog interfaces: A 183 response (without SDP) does not
cause the device to play a ringback tone (default).
[1]
Alert = Digital interfaces: The device sends an Alerting message
(upon receipt of a 183 response) instead of an ISDN Progress
message. Analog interfaces: 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.
Summary of Contents for Mediant 800 MSBG
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