AudioCodes Mediant 800B User Manual page 765

User's Manual
Parameter
Web: 183 Message
Behavior
EMS: SIP 183 Behaviour
CLI: 183-msg-behavior
[SIP183Behaviour]
[ReleaseIP2ISDNCallOnPro
gressWithCause]
Web: Session-Expires Time
EMS: Sip Session Expires
CLI: session-expires-time
[SIPSessionExpires]
Web: Minimum Session-
Expires
EMS: Minimal Session
Refresh Value
CLI: min-session-expires
[MinSE]
Web/EMS: Session Expires
Disconnect Time
CLI: session-exp-
disconnect-time
[SessionExpiresDisconne
ctTime]
Web/EMS: Session Expires
Version 6.8
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).
Digital: Defines the ISDN message that is sent when the 183 Session
Progress message is received for IP-to-Tel calls. Analog: Defines the
response of the device upon receipt of a SIP 183 response.

[0] Progress = (Default) Digital: The device sends a Progress
message. Analog: A 183 response (without SDP) does not cause
the device to play a ringback tone.

[1] Alert = Digital: The device sends an Alerting message (upon
receipt of a 183 response) instead of an ISDN Progress message.
Analog: 183 response is handled by the device as if a 180 Ringing
response is received, and the device plays a ringback tone.
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 did 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.
Determines the SIP method used for session-timer updates.
765
54. Configuration Parameters Reference
Description
Mediant 800B Gateway and E-SBC