Nortel Networks Mediant TP-1610 SIP - Manual (Page 106)

Mediant 2000 SIP
Mediant 2000 SIP User’s Manual 106 Document #: LTRT-72504
Table 6-3: SIP Configuration Parameters (continues on pages 100 to 110)
ini File Field Name
Web Parameter Name
*
Valid Range and Description
CngDetectorMode
[CNG Detector Mode] 0 = Don’t detect CNG (default)
2 = Detect CNG on caller side and start fax session (if IsFaxUsed=1)
Usually T.38 fax session starts when the “preamble” signal is detected by the
answering side. Some SIP gateways doesn’t’ support the detection of this fax signal on
the answering side, for these cases it is possible to configure the gateways to start the
T.38 fax session when the CNG tone is detected by the originating side. However this
mode is not recommended.
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 I on
page 227 .
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] 0 = Not activate (default)
Timeout [seconds] for Keeping a "re-INVITE" message alive within a SIP session
MINSE
[Minimum Session-Expires] Defines the time (in seconds) that is used in the Min-SE header field. This field 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 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 Mediant 2000 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.
EnableTransfer
[Enable Transfer] 0 = Call transfer is not allowed (default).
1 = The gateway responds to a Refer message with "Referred To" header to initiates a
Call Transfer.