AudioCodes Mediant 4000 SBC, User Manual

Page: 577 / 1037

CHAPTER 25 Routing SBC
Mediant 4000 SBC | User's Manual
Configuring Classification Based on Tags
You can classify incoming SIP dialogs to IP Groups, using tags (source tags) that are obtained
from Call Setup Rules associated with the SIP Interfaces on which dialogs are received. Using
tags can significantly reduce the number of required Classification rules. In some scenarios, a
single Classification rule may suffice.
Classification based on tags includes the following stages:
1. The device determines the tag of the incoming SIP dialog by running a Call Setup Rule that is
associated with the SIP Interface on which the dialog is received. The Call Setup Rule can be
based on any query (request) type (e.g., LDAP, Dial Plan or HTTP). You can configure the Call
Setup Rule to generate a tag with a name and value (e.g., "Country=Ireland") or only a value
(e.g., "Ireland").
2. The device searches the Classification table for a matching rule based on the SIP Interface
(and optionally, any other existing matching properties) as well as the tag. The tag can be a
name (e.g., "Country"), or "default" if the tag only has a value (e.g., "Ireland").
3. The device searches the IP Groups table for an IP Group that is configured with the tag from
the Call Setup Rule (name=value or value only) and if found, classifies the dialog to that IP
Group.
● Classification based on tags is done only if classification based on user registration
and Proxy Set fail.
● The IP Group Set table is not used for classification (i.e., ignores tags).
The following procedure describes how to configure incoming SIP dialog classification based on
tags. The procedure is based on an example that uses Dial Plan tags to classify calls to three dif-
ferent IP Groups:
■ Calls with source number (user) 410 are classified to IP Group-1
■ Calls with source number (user) 420 are classified to IP Group-2
■ Calls with source number (user) 430 are classified to IP Group-3
Instead of using Dial Plan tags, you can use any other request type (e.g., LDAP) in Call Setup
Rules to determine the source tags.
➢
To configure Classification based on tags:
1. Open the Dial Plan table (see Configuring Dial Plans on page 462), and then configure Dial
Plan tags. In our example, the following Dial Plan rules are configured for Dial Plan "ITSP":
Name Prefix Tag
Rule1 410 Country=Ireland
Rule2 420 Country=Scotland
Rule3 430 Country=England
2. Open the Call Setup Rules table (see Configuring Call Setup Rules on page 452), and then
configure Call Setup Rules for obtaining source tags of incoming SIP dialogs. In our example,
the following Call Setup Rule is configured:
General
'Rules Set ID' 1
- 544 -