AudioCodes Mediant 3000 User Manual page 700

Parameter
Web: 183 Message
Behavior
EMS: SIP 183 Behaviour
[SIP183Behaviour]
[ReleaseIP2ISDNCallOn
ProgressWithCause]
Web: Session-Expires
Time
EMS: Sip Session Expires
[SIPSessionExpires]
Web: Minimum Session-
Expires
EMS: Minimal Session
Refresh Value
[MinSE]
Web/EMS: Session
Expires Disconnect Time
CLI: session-exp-
disconnect-time
[SessionExpiresDiscon
nectTime]
User's Manual
When enabled, if the device sends a 183 response with an SDP (due to
a received ISDN Progress or Proceeding with PI messages) and an
Alerting message is then received from the Tel side (with or without
Progress Indicator), the device does not send an additional 18x
response, and the voice channel remains open. However, if the device
did not send a 183 with an SDP and it receives an Alert without PI, the
device sends a 180 (without SDP). If it receives an Alert with PI it sends
a 183with an SDP.
When disabled, the device sends additional 18x responses as a result
of receiving Alerting and Progress messages, regardless of whether or
not a 18x response was already sent.
Note: This parameter is applicable only if the EnableEarlyMedia
parameter is set to 1 (i.e., enabled).
Defines the ISDN message that is sent when the 183 Session Progress
message is received for IP-to-Tel calls.

[0] Progress = (Default) The device sends a Progress message. .

[1] Alert = The device sends an Alerting message (upon receipt of a
183 response) instead of an ISDN Progress message.
Typically, if an Q.931 Progress message with a Cause is received from
the PSTN for an outgoing IP-to-ISDN call and the EnableEarlyMedia
parameter is set to 1 (i.e., the Early Media feature is enabled), the
device interworks the Progress to 183 + SDP to enable the originating
party to hear the PSTN announcement about the call failure.
Conversely, if EnableEarlyMedia is set to 0, the device disconnects the
call by sending a SIP 4xx response to the originating party. However, if
the ReleaseIP2ISDNCallOnProgressWithCause parameter is set to 1,
then the device sends a SIP 4xx response even if the
EnableEarlyMedia parameter is set to 1.

[0] = (Default) If a Progress with Cause message is received from
the PSTN for an outgoing IP-to-ISDN call, the device does not
disconnect the call by sending a SIP 4xx response to the originating
party.

[1] = The device sends a SIP 4xx response when the
EnableEarlyMedia parameter is set to 0.

[2] = The device always sends a SIP 4xx response, even if he
EnableEarlyMedia parameter is set to 1.
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).
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 is 90.
Defines a session expiry timeout. The device disconnects the session
(sends a SIP BYE) if the refresher does not send a refresh request
before one-third (1/3) of the session expires time, or before the time
configured by this parameter (the minimum of the two).
The valid range is 0 to 32 (in seconds). The default is 32.
700
Description
Document #: LTRT-89729
Mediant 3000