AudioCodes Mediant 500 E-SBC, User Manual

Page: 265 / 920

User's Manual 17. Control Network
Version 6.8 265 Mediant 500 E-SBC
Parameter Description
the users.
Digest authentication using SIP 401/407 responses (if needed) is
performed by the Serving IP Group. The device forwards these
responses directly to the SIP users.
To route a call to a registered user, a rule must be configured in the
Outbound IP Routing table or SBC IP-to-IP Routing table. The
device searches the dynamic database (by using the request URI)
for an entry that matches a registered AOR or Contact. Once an
entry is found, the IP destination is obtained from this entry, and a
SIP request is sent to the destination.
The device also supports NAT traversal for the SIP clients located
behind NAT. In this case, the device must be defined with a global
IP address.

[2] Gateway = This is applicable only to the SBC application in
scenarios where the device receives requests to and from a
gateway representing multiple users. This IP Group type is
necessary as the other IP Group types are not suitable:

The IP Group cannot be defined as a Server since its
destination address is unknown during configuration.

The IP Group cannot be defined as a User since the SIP
Contact header of the incoming REGISTER does not represent
a specific user. The Request-URI user part can change and
therefore, the device is unable to identify an already registered
user and therefore, adds an additional record to the database.
The IP address of the Gateway IP Group is obtained dynamically
from the host part of the Contact header in the REGISTER request
received from the IP Group. Therefore, routing to this IP Group is
possible only once a REGISTER request is received. If a
REGISTER refresh request arrives, the device updates the new
location (i.e., IP address) of the IP Group. If the REGISTER fails,
no update is performed. If an UN-REGISTER request arrives, the
IP address associated with the IP Group is deleted and therefore,
no routing to the IP Group is done.
Note: This field is applicable only to the SBC and IP-to-IP application.
Description
CLI: description
[IPGroup_Description]
Defines a brief description for the IP Group.
The valid value is a string of up to 29 characters. The default is an
empty field.
Proxy Set ID
CLI: proxy-set-id
[IPGroup_ProxySetId]
Assigns a Proxy Set ID to the IP Group. All INVITE messages
destined to this IP Group are sent to the IP address configured for the
Proxy Set.
Notes:

The Proxy Set is applicable only to Server-type IP Groups.

The SRD configured for this Proxy Set in the Proxy Set table is
automatically assigned to this IP Group (see the 'SRD' field below).

To configure Proxy Sets, see ''Configuring Proxy Sets'' on page
274 .
SIP Group Name
CLI: sip-group-name
[IPGroup_SIPGroupName]
Defines the SIP Request-URI host name in INVITE and REGISTER
messages sent to this IP Group, or the host name in the From header
of INVITE messages received from this IP Group. In other words, it
replaces the original host name.
The valid value is a string of up to 100 characters. The default is an