AudioCodes E-SBC User Manual page 1206

CHAPTER 68 Configuration Parameters Reference
Parameter
[ReleaseIP2ISDNCallOn
ProgressWithCause]
'Session-Expires Time'
configure voip >
sbc settings >
session-expires-
time
[SIPSessionExpires]
'Minimum Session-
Expires'
configure voip >
sbc settings > min-
session-expires
[MinSE]
'Session Expires
Disconnect Time'
configure voip >
sip-definitions
settings > sess-
exp-disc-time
[SessionExpiresDisconne
ctTime]
Mediant 1000 Gateway & E-SBC | User's Manual
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.
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.
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.
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., 60/3 is 30, and 90 minus 30 is 60).
- 1168 -
Description