AudioCodes Mediant 500 E-SBC, User Manual

Page: 777 / 920

User's Manual 54. Configuration Parameters Reference
Version 6.8 777 Mediant 500 E-SBC
Parameter Description
setting).

[2] D-Channel = Takes the D-Channel down or brings it up. For a
detailed description, see option [2] of the
DigitalOOSBehaviorForTrunk_x parameter (per trunk setting).

[3] Alarm = Sends or clears a PSTN Alarm Indication Signal (AIS)
alarm. For a detailed description, see option [3] of the
DigitalOOSBehaviorForTrunk_x parameter (per trunk setting).

[4] Block = Blocks the trunk. For a detailed description, see option
[4] of the DigitalOOSBehaviorForTrunk_x parameter (per trunk
setting).

[5] Service and D-Channel = Sends ISDN Service messages to
indicate out-of-service or in-service state and takes the D-channel
down or brings it up. For a detailed description, see option [5] of
the DigitalOOSBehaviorForTrunk_x parameter (per trunk setting).
Notes:

When using the parameter to configure out-of-service behavior for
all trunks, you must reset the device for the settings to take effect.

If the ISDN variant does not support the configured out-of-service
option of the parameter, the device sets the parameter to Default
[0].
Retransmission Parameters
Web: SIP T1
Retransmission Timer
[msec]
EMS: T1 RTX
CLI: t1-re-tx-time
[SipT1Rtx]
Defines 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. For INVITE requests, it is
multiplied by two for each new retransmitted message. For all other
SIP messages, it is multiplied by two until SipT2Rtx. For example,
assuming 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.
Web: SIP T2
Retransmission Timer
[msec]
EMS: T2 RTX
CLI: t2-re-tx-time
[SipT2Rtx]
Defines the maximum interval (in msec) between retransmissions of
SIP messages (except for INVITE requests).
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.
Web: SIP Maximum RTX
EMS: Max RTX
CLI: sip-max-rtx
[SIPMaxRtx]
Defines the maximum number of UDP transmissions of SIP messages
(first transmission plus retransmissions).
The range is 1 to 30. The default is 7.