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This chapter describes the dial plan as it is used with the Cisco VSC2700 or Cisco SC2200 open packet telephony controller and the tasks associated with the Dial Plan Provisioning (DPP) utilities that are included with the open packet telephony controller.
A dialing plan is a numbering plan for your network, applicable to both incoming and outgoing calls, that directs the signals. Typically, all calls to a subscriber use the same number in the trunk service.
The dial plan provides the ability to customize number analysis on the open packet telephony controller. The dialing plans can be configured to analyze the calling number (A-number or CgPN) and the called number (B-number or CdPN) on both the incoming and outgoing sides of the call to the customer networks.
Figure 1-1 is a basic illustration of the signal flow for a single telephony controller configuration.
The types of analysis that can be performed on the A-numbers and B-numbers are as follows:
For more information about dial plan output, see "Using the Dial Plan."
When an incoming address message (IAM) is received, an analysis is made of the B-number, looking for the calling line ID (CLI) requirement; then a response is made back to the universal call model (UCM).
When it receives this response, the UCM will activate seizure of the originating side channel. Next, the UCM will make a formal analysis request for analysis of A-number, B-number, and Route where the expected final result in a Cisco VSC2700 configuration is a sigPath on which the engine can perform circuit selection.
Once the data is received, the dialled number can be analyzed by accessing the dial plan flat file.
The Routing process is described in the"Validate Routing Tables" section and in the "Routing Process Overview" section.
There are two overall tasks you will perform for your dial plan:
The dial plan text file is your input file. If a dial plan exists, it can be converted to the text file format that the open packet telephony controller tool can read. If no dial plan exists, one must be created as a text file.
Review the syntax of the dial plan for input errors before you import it into the open packet telephony controller system. Pay particular attention to opening and closing braces which must always exist in pairs. For more information, see the "Import a Dial Plan" section.
After your dial plan is in place, your tasks will be associated with generating the output data files the open packet telephony controller uses via the DPP tool utilities. For more information about the utilities, see "Using the Dial Plan."
Posted: Fri May 28 15:25:09 PDT 1999
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