Version 6.6 761 October 2014
Installation & Operation Manual 43. Session Border Controller (SBC) Application
43.13 SBC Message Manipulation
SIP header manipulation enables insertion, removal, and/or modification of SIP
headers and parameters. This manipulation is configured in the Message
Manipulations table. This feature enables the normalization of SIP messaging fields
between communicating network segments. For example, it allows service providers
to design their own policies on the SIP messaging fields that must be present before a
SIP call enters their network. Similarly, enterprises and small businesses may have
policies for the information that can enter or leave their networks for policy or security
reasons from a service provider. The manipulations can also be implemented to
resolve incompatibilities between SIP devices inside the enterprise network.
SIP messaging manipulation supports the following:
Addition of new headers.
Removal of headers ("Black list").
Modification of header components - value, header value (e.g., URI value of the
P-Asserted-Identity header can be copied to the From header), call's parameter
values.
Deletion of SIP body (e.g., if a message body isn’t supported at the destination
network this body is removed).
Translating one SIP response code to another.
Topology hiding (generally present in SIP headers, such as Via, Record Route,
Route and Service-Route).
Configurable identity hiding (information related to identity of subscribers for
example, P-Asserted-Identity, Referred-By, Identity and Identity-Info).
Apply conditions per rule - the condition can be on parts of the message or call’s
parameters.
Multiple manipulation rules on the same SIP message.
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