AudioCodes Mediant 4000 SBC User Manual page 785

User's Manual
Parameter
SIP T2 Retransmission
Timer
configure voip > sip-
definition settings > t2-re-
tx-time
[SipT2Rtx]
SIP Maximum RTX
configure voip > sip-
definition settings > sip-
max-rtx
[SIPMaxRtx]
Number of RTX Before
Hot-Swap
configure voip > sip-
definition proxy-and-
registration > nb-of-rtx-
b4-hot-swap
[HotSwapRtx]
SIP Message Manipulations Table
Message Manipulations
configure voip > message
message-manipulations
[MessageManipulations]
Message Policies Table
Message Policies
configure voip > message
message-policy
[MessagePolicy]
Version 7.2

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.
For example, if configured to 3 and no response is received from an IP
destination, the device attempts another three times to send the call to the
IP destination. If still unsuccessful, it attempts to redirect the call to another
IP destination.
Note: The parameter is also used for alternative routing (see Alternative
Routing Based on IP Connectivity.
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 the table, see Configuring SIP Message
Manipulation on page 358.
Defines SIP message policy rules for blocking (blacklist) unwanted
incoming SIP messages or allowing (whitelist) receipt of desired
messages.
The format of the ini file table parameter is as follows:
[MessagePolicy]
FORMAT MessagePolicy_Index = MessagePolicy_Name,
MessagePolicy_MaxMessageLength, MessagePolicy_MaxHeaderLength,
785
55. Configuration Parameters Reference
Description
Mediant 4000 SBC