User`s manual

Mediant 2000 & TP-1610 & TP-260
SIP User's Manual 162 Document #: LTRT-68805
Table 6-7: SIP Configuration Parameters (continues on pages 150 to 169)
ini File Field Name
Web Parameter Name
Valid Range and Description
DefaultReleaseCause
[Default Release Cause]
Default Release Cause (for IP to Tel calls), used when the gateway initiates a
call release, and if an explicit matching cause for this release isn’t found, a
default release cause can be configured. The default release cause is
described in the Q.931 notation, and translated to corresponding SIP
equivalent response value
The default release cause is: NO_ROUTE_TO_DESTINATION (3).
Other common values are: NO_CIRCUIT_AVAILABLE (34) or
DESTINATION_OUT_OF_ORDER (27), etc.
Note: The default release cause is described in the Q.931 notation, and is
translated to corresponding SIP 40x or 50x value. For example: 404 for 3, 503
for 34 and 502 for 27.
For mapping of SIP to Q.931 and Q.931 to SIP release causes, refer to
Appendix
H on page 379.
IPAlertTimeout
[Tel to IP No Answer Timeout]
Defines the time (in seconds) the gateway waits for a 200 OK response from
the called party (IP side) after sending an INVITE message. If the timer
expires, the call is released.
The valid range is 0 to 3600. The default value is 180.
SipSessionExpires
[Session-Expires Time]
Determines the timeout (in seconds) for keeping a re-INVITE message alive
within a SIP session. The SIP session is refreshed (using INVITE) each time
this timer expires.
The default is 0 (not activated).
MINSE
[Minimum Session-Expires]
Defines the time (in seconds) that is used in the Min-SE header. This header
defines the minimum time that the user agent supports for session refresh.
The valid range is 10 to 100000. The default value is 90.
SIPMaxRtx
[SIP Maximum Rtx]
Number of UDP transmissions (first transmission + retransmissions) of SIP
messages.
The range is 1 to 7.
The default value is 7.
SipT1Rtx
[SIP T1 Retransmission Timer
(msec)]
The time interval (in msec) between the first transmission of a SIP message
and the first retransmission of the same message.
The default is 500.
Note: The time interval between subsequent retransmissions of the same SIP
message starts with SipT1Rtx and is multiplied by two until SipT2Rtx.
For example (assuming that SipT1Rtx = 500 and SipT2Rtx = 4000):
The first retransmission is sent after 500 msec.
The second retransmission is sent after 1000 (2*500) msec.
The third retransmission is sent after 2000 (2*1000) msec.
The fourth retransmission and subsequent retransmissions until SIPMaxRtx
are sent after 4000 (2*2000) msec.
SipT2Rtx
[SIP T2 Retransmission Timer
(msec)]
The maximum interval (in msec) between retransmission of SIP messages.
The default is 4000.
Note: The time interval between subsequent retransmissions of the same SIP
message starts with SipT1Rtx and is multiplied by two until SipT2Rtx.
EnableEarlyMedia
[Enable Early Media]
0 = Early Media is disabled (default).
1 = Enable Early Media.
If enabled, the gateway gateway sends 183 Session Progress response with
SDP (instead of 180 ringing), enabling the setup of the media stream prior to
the answering of the call. Sending 183 response depends on the Progress
Indicator. It is sent only if PI=1 or PI=8 was received in Proceeding or Alert PRI
messages. For CAS gateways see the ‘ProgressIndicator2IP’ parameter.
Note: Generally, this parameter is set to 1.