Polycom 3725-76302-001LI manual 3Fields in the Dial Rules lists

DMA Operations Guide Dial Rules

The Call Server comes with a default dial plan installed that provides the most commonly needed address resolution processing. On the Dial Rules page, you can add, edit, remove, and change the order of the dial rules that make up the system’s dial plan. This is a supercluster-wide configuration.

The Call Server can optionally have a separate dial plan used only for untrusted (“unauthorized” or “guest”) SIP calls. These are calls from devices that are not registered with the Polycom DMA system and are outside the corporate firewall (but not part of a federated enterprise). These calls typically come to the DMA system via session border controllers (SBCs) such as a Polycom RealPresence Access Director or Acme Packet Session Border Controller device.

You can configure the system to recognize and accept such calls on the Signaling Settings page (see “H.323 and SIP Signaling” on page 71). On the Dial Rules page, you can route these calls to specific VMRs (virtual meeting rooms) or VEQs (virtual entry queues), or to a specific SIP peer by creating a separate set of “guest” dial rules used only for these untrusted calls.

A dial rule consists of an optional preliminary script you can create to modify dial strings and the action to be performed, which you select from a well-defined list of actions. These actions encapsulate potentially complex dial resolution logic, which shields you from having to deal with these complexities.

For instance, the Resolve to registered endpoint action applies all the associated system configurations and performs various searches on the internal endpoint registration records to determine if the inbound call is attempting to reach another registered endpoint. It automatically adjusts for signaling protocol (SIP/H.323), case, and standard dial string deviations to locate a registered endpoint. You don’t have to account for these variables in your dial plan because the logic behind the action does so for you.

You can test the current dial rules using the Test Dial Rules command. In the dialog box it opens, you can specify various caller parameters and a dial string, and see how the current dial rules handle such a call. See “Test Dial Rules Dialog Box” on page 245.

The Dial Rules page contains two lists, one for authorized calls and one for unauthorized calls. The former contains the system’s default dial plan. The latter is empty unless you add rules to it. Both lists contain the same fields. The following table describes the fields in the two lists.

Table 10-3Fields in the Dial Rules lists

Column	Description
Order	The priority order of the rules. Use the Move Up and
	Move Down commands to change the priority of a rule.
Description	Brief description of the rule.
Action	Action performed by the rule.

244 Polycom, Inc.