IP Group Parameters
Parameter Description
Common Parameters
Type
CLI:type
[IPGroup_Type]
Defines the type of IP Group:
[0] Server = Used when the destination address, configured by the
Proxy Set, of the IP Group (e.g., ITSP, Proxy, IP-PBX, or Application
server) is known.
[1] User = Represents a group of users such as IP phones and
softphones where their location is dynamically obtained by the device
when REGISTER requests and responses traverse (or are
terminated) by the device. These users are considered remote (far-
end) users.
Typically, this IP Group is configured with a Serving IP Group that
represents an IP-PBX, Application or Proxy server that serves this
User-type IP Group. Each SIP request sent by a user of this IP Group
is proxied to the Serving IP Group. For registrations, the device
updates its internal database with the AOR and contacts of 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 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 Gro
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 or 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.
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