192
V7122 GatewayUser Guide
ini
File Field Name
Web Parameter Name
Valid Range and Description
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.
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.
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 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.
Generally, this parameter is set to 1.
EnableTransfer
[Enable Transfer]
0 = Call transfer is not allowed.
1 = The gateway responds to a REFER message with ‘Referred-To’ header
to initiates a call transfer (default).
To use this service, the gateways at both ends must support
this option.
To use this service, set the parameter ‘Enable Hold’ to ‘Yes’.
XferPrefix
[Transfer Prefix]
Defined string that is added, as a prefix, to the transferred called number,
when REFER/3xx message is received.
The number manipulation rules apply to the user part of the
Refer-To/Contact URI before it is sent in the INVITE message.
The xferprefix parameter can be used to apply different
manipulation rules to differentiate the transferred number from
the original dialed number.
EnableHold
[Enable Hold]
0 = Hold service is disabled.
1 = Hold service is enabled, held tone is played to holding party (default).
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