AudioCodes Mediant 3000, User Manual

Page: 455 / 872

Version 6.6 455 Mediant 3000
User's Manual 29. SBC Configuration
29.5 SBC Manipulations
This section describes the configuration of the manipulation rules for the SBC application.
Note: For additional manipulation features, see the following:
•
'Configuring SIP Message Policy Rules'.
•
'Configuring SIP Message Manipulation' on page 250 .
The device supports SIP URI user part (source and destination) manipulations for inbound
and outbound routing. These manipulations can be applied to a source IP group, source
and destination host and user prefixes, and/or user-defined SIP request (e.g., INVITE,
OPTIONS, SUBSCRIBE, and/or REGISTER). Since outbound manipulations are
performed after routing, the outbound manipulation rule matching can also be done by
destination IP Group. Manipulated destination user and host are performed on the following
SIP headers: Request-URI, To, and Remote-Party-ID (if exists). Manipulated source user
and host are performed on the following SIP headers: From, P-Asserted (if exists), P-
Preferred (if exists), and Remote-Party-ID (if exists).
Figure 29-11: SIP URI Manipulation in IP-to-IP Routing
You can also restrict source user identity in outgoing SIP dialogs in the Outbound
Manipulation table (using the column PrivacyRestrictionMode). The device identifies an
incoming user as restricted if one of the following exists:

From header user is 'anonymous'.

P-Asserted-Identity and Privacy headers contain the value 'id'.
All restriction logic is done after the user number has been manipulated.
Host name (source and destination) manipulations are simply host name substitutions with
the names defined for the source and destination IP Groups respectively (if any, in the IP
Group table).
Below is an example of a call flow and consequent SIP URI manipulations:

Incoming INVITE from LAN:
INVITE sip:1000@10.2.2.3;user=phone;x=y;z=a SIP/2.0
Via: SIP/2.0/UDP 10.2.2.6;branch=z9hGLLLLLan
From:<sip:7000@10.2.2.6;user=phone;x=y;z=a>;tag=OlLAN;paramer1
=abe
To: <sip:1000@10.2.2.3;user=phone>
Call-ID: USELLLAN@10.2.2.3