AudioCodes Media Pack MP-124 User Manual page 269

SIP User's Manual
Parameter
Retransmission Parameters
Web: SIP T1 Retransmission Timer
[msec]
EMS: T1 RTX
[SipT1Rtx]
Web: SIP T2 Retransmission Timer
[msec]
EMS: T2 RTX
[SipT2Rtx]
Web: SIP Maximum RTX
EMS: Max RTX
[SIPMaxRtx]
Version 5.8
6. Configuration Parameters Reference
Notes :

For this parameter to take effect, a device reset is
required.

The called number can include characters 'p' (1.5
seconds pause) and 'd' (detection of dial tone). If
character 'd' is used, it must be the first 'digit' in the
called number. The character 'p' can be used several
times.
For example (for FXS/FXO interfaces), the called
number can be as follows: d1005, dpp699, p9p300. To
add the 'd' and 'p' digits, use the usual number
manipulation rules.

To use this feature with FXO interfaces, configure the
device to operate in one-stage dialing mode.

If this parameter is enabled, it is possible to configure
the FXS/FXO interface to wait for dial tone per
destination phone number (before or during dialing of
destination phone number). Therefore, the parameter
IsWaitForDialTone (configurable for the entire device) is
ignored.

The FXS interface send SIP 200 OK responses only
after the DTMF dialing is complete.
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.
The maximum interval (in msec) between retransmissions
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.
Maximum number of UDP transmissions (first transmission
plus retransmissions) of SIP messages.
The range is 1 to 30. The default value is 7.
269
Description
September 2009