CHAPTER20 SIP Definitions
Mediant 1000 Gateway & E-SBC | User's Manual
You can assign a Dial Plan to an IP Group or SRD. After Classification and Inbound
Manipulation, the device checks if a Dial Plan is associated with the incoming call. It first
checks the source IP Group and if no Dial Plan is assigned, it checks the SRD. If a Dial Plan is
assigned to the IP Group or SRD, the device first searches the Dial Plan for a dial plan rule that
matches the source number and then it searches the Dial Plan for a rule that matches the
destination number. If matching dial plan rules are found, the tags configured for these rules are
used in the routing and/or manipulation processes as source and/or destination tags.
■ Gateway application:
● IP-to-Tel Routing rules (see Configuring IP-to-Tel Routing Rules on page593
● Tel-to-IP Routing rules (see Configuring Tel-to-IP Routing Rules on page582)
Notes for the SBC application:
● User categorization by Dial Plan is done only after the device's Classification and
Inbound Manipulation processes, and before the routing process.
● Once the device successfully categorizes an incoming call by Dial Plan, it not only
uses the resultant tag in the immediate routing or manipulation process, but also in
subsequent routing and manipulation processes that may occur, for example, due
to alternative routing or local handling of call transfer and call forwarding (SIP
3xx\REFER).
● For manipulation, tags are applicable only to outbound manipulation.
● When tags are used in the IP-to-IP Routing table to determine destination IP
Groups (i.e., 'Destination Type' parameter configured to Destination Tag), the
device searches the Dial Plan for a matching destination (called) prefix number
only.
The figure below shows a conceptual example of routing based on tags, where users categorized
as tag "A" are routed to SIP Trunk "X" and those categorized as tag "B" are routed to SIP Trunk "Y":
The Dial Plan itself is a set of dial plan rules having the following attributes:
■ Prefix: The prefix is matched against the source and/or destination number of the incoming call
(e.g., SIP dialog-initiating request for IP calls).
■ Tag: The tag corresponds to the matched prefix of the source and/or destination number and is
the categorization result.
You can use various syntax notations to configure the prefix numbers in dial plan rules. You can
configure the prefix as a complete number (all digits) or as a partial number using some digits and
various syntax notations (patterns) to allow the device to match a dial pan rule for similar source
and/or destination numbers. For more information, see the description of the 'Prefix' parameter
(DialPlanRule_Prefix) described later in this section.
- 492 -
To Next Page
Loading...
Need help?
General
