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
[SipT2Rtx]
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
[SIPMaxRtx]
Defines the maximum number of UDP transmissions of SIP messages
(first transmission plus retransmissions).
The range is 1 to 30. The default value is 7.
Web: Number of RTX
Before Hot-Swap
EMS: Proxy Hot Swap Rtx
[HotSwapRtx]
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 value is 3.
Note: This parameter is also used for alternative routing. If a domain
name in the Tel to IP Routing 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.
SIP Message Manipulations Table
Web: Message
Manipulations
EMS: Message
Manipulations
[MessageManipulations]
This table parameter defines manipulation rules for SIP header
messages.
The format of this 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;
Note: For a detailed description of this table, see Configuring SIP
Message Manipulation.
Message Policy Table
Web: Message Policy
Table
[MessagePolicy]
This table parameter configures SIP message policy rules for blocking
(blacklist) unwanted incoming SIP messages or allowing (whitelist)
receipt of desired messages. The format of this parameter is as follows:
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