AudioCodes Mediant 500 MSBR, User Manual

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User's Manual 1050 Document #: LTRT-10375
Mediant 500 MSBR
[SIP183Behaviour]

[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.
Note: The parameter is applicable only to the Gateway application.
[ReleaseIP2ISDNCallOnP
rogressWithCause] 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.
Note: The parameter is applicable only to digital interfaces.
Session-Expires Time
configure voip > sbc
settings > session-
expires-time
[SIPSessionExpires]
Defines the numerical value sent in the Session-Expires header in the
first SIP 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).
Note: The parameter is applicable only to the Gateway application.
Minimum Session-Expires
configure voip > sbc
settings > min-session-
expires
[MinSE]
Defines the time (in seconds) in the SIP Min-SE header. The header
defines the minimum time that the user agent refreshes the session.
The valid range is 10 to 100,000. The default is 90.
Note: The parameter is applicable only to the Gateway application.
Session Expires
Disconnect Time
configure voip >
sip-definitions
settings > sess-
exp-disc-time
[SessionExpiresDisconne
ctTime]
Defines a session expiry timeout.
The new session expiry timeout is calculated by subtracting the
configured value from the original timeout as specified in the Session-
Expires header. However, the new timeout must be greater than or
equal to one-third (1/3) of the Session-Expires value. If the refresher
does not send a refresh request within the new timeout, the device
disconnects the session (i.e., sends a SIP BYE).
For example, if you configure the parameter to 32 seconds and the
Session-Expires value is 180 seconds, the session timeout occurs 148
seconds (i.e., 180 minus 32) after the last session refresh. If the
Session-Expires header value is 90 seconds, the timeout occurs 60
seconds after the last refresh. This is because 90 minus 32 is 58
seconds, which is less than one third of the Session-Expires value (i.e.,