User's Manual 650 Document #: LTRT-27055
Mediant 1000B Gateway & E-SBC
• All SIP requests (e.g., INVITE) except REGISTER:
♦ Source URL: Obtained from the From header. If the From header contains
the value 'Anonymous', the source URL is obtained from the P-Preferred-
Identity header. If the P-Preferred-Identity header does not exist, the source
URL is obtained from the P-Asserted-Identity header.
♦ Destination URL: Obtained from the Request-URI.
• REGISTER dialogs:
♦ Source URL: Obtained from the To header.
♦ Destination URL: Obtained from the Request-URI.
Note: You can specify the SIP header from where you want the device to obtain the
source URL in the incoming dialog request. This is configured in the IP Groups table
using the 'Source URI Input' parameter (see ''Configuring IP Groups'' on page 353).
2. Determining SIP Interface: The device checks the SIP Interface on which the SIP
dialog is received. The SIP Interface defines the local SIP "listening" port and IP
network interface. For more information, see ''Configuring SIP Interfaces'' on page
345.
3. Applying SIP Message Manipulation: Depending on configuration, the device can
apply a SIP message manipulation rule (assigned to the SIP Interface) on the
incoming SIP message. A SIP Message Manipulation rule defines a matching
characteristics (condition) of the incoming SIP message and the corresponding
manipulation operation (e.g., remove the P-Asserted-Identity header), which can apply
to almost any aspect of the message (add, remove or modify SIP headers and
parameters). For more information, see ''Configuring SIP Message Manipulation'' on
page 401.
4. Classifying to an IP Group: Classification identifies the incoming SIP dialog request
as belonging to a specific IP Group (i.e., from where the SIP dialog request
originated). The classification process is based on the SRD to which the dialog
belongs (the SRD is determined according to the SIP Interface). For more information,
see ''Configuring Classification Rules'' on page 687.
5. Applying Inbound Manipulation: Depending on configuration, the device can apply
an Inbound Manipulation rule to the incoming dialog. This manipulates the user part of
the SIP URI for source (e.g., in the SIP From header) and destination (e.g., in the
Request-URI line). The manipulation rule is associated with the incoming dialog, by
configuring the rule with incoming matching characteristics such as source IP Group
and destination host name. The manipulation rules are also assigned a Routing
Policy, which in turn, is assigned to IP-to-IP routing rules. As most deployments
require only one Routing Policy, the default Routing Policy is automatically assigned to
manipulation and routing rules. For more information, see ''Configuring IP-to-IP
Inbound Manipulations'' on page 725.
6. SBC IP-to-IP Routing: The device searches the IP-to-IP Routing table for a routing
rule that matches the characteristics of the incoming call. If found, the device routes
the call to the configured destination which can be, for example, an IP Group, the
Request-URI if the user is registered with the device, and a specified IP address. For
more information, see ''Configuring SBC IP-to-IP Routing Rules'' on page 695.
7. Applying Inbound SIP Message Manipulation: Depending on configuration, the
device can apply a SIP message manipulation rule (assigned to the IP Group) on the
incoming dialog. For more information, see Stage 3.
8. Applying Outbound Manipulation: Depending on configuration, the device can
apply an Outbound Manipulation rule to the outbound dialog. This manipulates the
user part of the Request-URI for source (e.g., in the SIP From header) or destination
(e.g., in the SIP To header) or calling name in the outbound SIP dialog. The
To Next Page
Loading...
