AudioCodes Mediant 800B User Manual page 820

Parameter
Web: SIP T2
Retransmission Timer
[msec]
EMS: T2 RTX
CLI: t2-re-tx-time
[SipT2Rtx]
Web: SIP Maximum RTX
EMS: Max RTX
CLI: sip-max-rtx
[SIPMaxRtx]
Web: Number of RTX
Before Hot-Swap
EMS: Proxy Hot Swap Rtx
CLI: nb-of-rtx-b4-hot-swap
[HotSwapRtx]
SIP Message Manipulations Table
Web: Message
Manipulations
EMS: Message
Manipulations
CLI: configure voip > sbc
manipulations message-
manipulations
[MessageManipulations]
User's Manual

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.
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.
Defines the maximum number of UDP transmissions of SIP messages
(first transmission plus retransmissions).
The range is 1 to 30. The default is 7.
Defines the number of retransmitted INVITE/REGISTER messages
before the call is routed (hot swap) to another Proxy/Registrar.
The valid range is 1 to 30. The default is 3.
Note: This parameter is also used for alternative routing. If a domain
name in the Outbound IP Routing table or SBC IP-to-IP Routing table
is resolved into two IP addresses, and if there is no response for
HotSwapRtx retransmissions to the INVITE message that is sent to the
first IP address, the device immediately initiates a call to the second IP
address.
This table parameter defines manipulation rules for SIP header
messages.
The format of the ini file table parameter is as follows:
[ MessageManipulations]
FORMAT MessageManipulations_Index =
MessageManipulations_ManSetID,
MessageManipulations_MessageType,
MessageManipulations_Condition,
MessageManipulations_ActionSubject,
MessageManipulations_ActionType,
MessageManipulations_ActionValue,
MessageManipulations_RowRole;
[\MessageManipulations]
For example, the below configuration changes the user part of the SIP
From header to 200:
MessageManipulations 1 = 0, Invite.Request, , Header.From.Url.User,
2, 200, 0;
For a detailed description of this table, see Configuring SIP Message
Manipulation on page 288.
820
Mediant 800B Gateway and E-SBC
Description
Document #: LTRT-10286