AudioCodes Mediant 4000 SBC, User Manual

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CHAPTER 18 Core Entities
Mediant 4000 SBC | User's Manual
Parameter Description
■ Regardless of the parameter, the device always
accepts registration refreshes from users that are
already registered in its database.
■ If configured to Disable or Enable, the parameter
overrides the 'Enable Un-Authenticated
Registrations' parameter settings of the SRD (in
the SRDs table) that is associated with the SIP
Interface.
'Max. Number of Registered Users'
max-reg-users
[SIPInterface_MaxNumOfRegUsers]
Defines the maximum number of users belonging to
the SIP Interface that can register with the device.
By default, no value is defined (i.e., the number of
allowed user registrations is unlimited).
Configuring IP Groups
The IP Groups table lets you configure up to 70 IP Groups. An IP Group represents a SIP entity in
the network with which the device communicates. This can be a server (e.g., IP PBX or ITSP) or a
group of users (e.g., LAN IP phones). For servers, the address of the IP Group is typically defined
by associating it with a Proxy Set (see
Configuring Proxy Sets ).
You can use IP Groups for the following:
■ Classification of incoming SIP dialog-initiating requests (e.g., INVITE messages) to IP Groups
based on Proxy Set. If the source address of the incoming SIP dialog is defined for a Proxy
Set, the assigns ("bonds") the SIP dialog to the IP Group associated with the Proxy Set. The
feature is configured using the IP Groups table's 'Classify by Proxy Set' parameter. For more
information and recommended security guidelines, see the parameter's description, later in this
section.
■ Classification of incoming SIP dialog-initiating requests (e.g., INVITE messages) to IP Groups
based on source tags of incoming dialog. Tag-based classification occurs only if Classification
based on user registration and on Proxy Sets fail. For more information, see
Configuring
Classification Based on Tags on page 544.
■ Representing the source and destination of the call in IP-to-IP Routing rules (see Configuring
SBC IP-to-IP Routing Rules ).
■ SIP dialog registration and authentication (digest user/password) of specific IP Groups (Served
IP Group, e.g., corporate IP-PBX) with other IP Groups (Serving IP Group, e.g., ITSP). This is
configured in the Accounts table (see
Configuring Registration Accounts ).
■ Included in routing decisions by a third-party routing server. If deemed necessary for routing,
the routing server can even create an IP Group. For more information, see
Centralized Third-
Party Routing Server .
You can also apply the device's Quality of Experience feature to IP Groups:
■ Quality of Experience Profile: Call quality monitoring based on thresholds for voice metrics
(e.g., MOS) can be applied per IP Group. For example, if MOS is considered poor, calls
belonging to this IP Group can be rejected. To configure Quality of Experience Profiles, see
Configuring Quality of Experience Profiles .
■ Bandwidth Profile: Bandwidth utilization thresholds can be applied per IP Group. For
example, if bandwidth thresholds are crossed, the device can reject any new calls on this IP
Group. To configure Bandwidth Profiles, see
Configuring Bandwidth Profiles .
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