User's Manual 222 Document #: LTRT-68822
Mediant 2000
The figure below illustrates a SIP message manipulation example:
Figure 17-1: SIP Header Manipulation Example
Notes:
• For a detailed description of the syntax for configuring SIP message manipulation
rules, refer to SIP Message Manipulations Quick Reference Guide.
• For the IP-to-IP application, the outgoing message is re-created and thus, SIP
headers that are not relevant to the outgoing SIP session (e.g., Referred-By) are
not included in the outgoing message. Therefore, if required, manipulations on
such headers should be handled in inbound manipulation.
• The values entered in the table are not case-sensitive.
• Each message can be manipulated twice - on the source leg and on the
destination leg (i.e., source and destination IP Groups).
• Unknown SIP parts can only be added or removed.
• SIP manipulations do not allow you to remove or add mandatory SIP headers.
They can only be modified and only on requests that initiate new dialogs.
Mandatory SIP headers include To, From, Via, CSeq, Call-Id, and Max-Forwards.
• The Message Manipulations table can also be configured using the table ini file
parameter, MessageManipulations.
 To configure SIP message manipulation rules:
1. Open the Message Manipulations page (Configuration tab > VoIP menu > SIP
Definitions submenu > Msg Policy & Manipulation > Message Manipulations).
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