AudioCodes MSBG Series User Manual

Version 7.2 369 Mediant 1000B Gateway & E-SBC
User's Manual 18. SIP Definitions
• Manipulating Inbound SIP INVITE Messages: Message manipulation can be
applied only to all inbound calls (not specific calls). This is done by assigning a
Manipulation Set ID to the "global" ini file parameter,
GWInboundManipulationSet.
• Manipulating Outbound SIP INVITE Messages:
a. Message manipulation can be done for specific calls, by assigning a
Manipulation Set ID to an IP Group in the IP Groups table, using the
'Outbound Message Manipulation Set' parameter.
b. Message manipulation can be applied to all outbound calls (except for IP
Groups that have been assigned a Manipulation Set ID). This is done by
assigning a Manipulation Set ID to the "global" ini file parameter,
GWOutboundManipulationSet.
The device also supports a built-in SIP message normalization feature that can be enabled
per Message Manipulation rule. The normalization feature removes unknown SIP message
elements before forwarding the message. These elements can include SIP headers, SIP
header parameters, and SDP body fields.
The SIP message manipulation feature supports the following:

Manipulation on SIP message type (Method, Request/Response, and Response type)

Addition of new SIP headers

Removal of SIP headers ("black list")

Modification of SIP header components such as values, header values (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 is not 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)

Multiple manipulation rules on the same SIP message

Apply conditions per rule - the condition can be on parts of the message or call’s
parameters

Multiple manipulation rules using the same condition. The following figure shows a
configuration example where rules 1 and 2 ('Row Rule' configured to Use Previous
Condition) use the condition configured for rule 0 ('Row Rule' configured to Use
Current Condition). For more information, see the description of the 'Row Rule'
parameter in this section.
Figure 18-1: Configuration Example of Message Manipulation Rules using Same Condition

AudioCodes MSBG Series Specifications

General

Brand	AudioCodes
Model	MSBG Series
Category	Gateway
Language	English