The system interprets dialed digits based on the dial plan. If you dial 9 on your system to access an outside line, the system finds an external trunk for that number because the dial plan is set that way.

The dial plan also defines the number of digits that indicate certain types of calls. For example, the dial plan might indicate that all internal extensions are four-digit numbers that start with either 1 or 2. An example will illustrate how to read the dial plan of your system.

Dial plan access table

The Dial Plan Analysis Table defines the dialing plan for your system. The Call Type column in the Dial Plan Analysis Table indicates what the system does when a user dials the digit or digits indicated in the Dialed String column. The Total Length column indicates how long the dialed string will be for each type of call.

Dial plan parameters table

The Dial Plan Analysis table and the Dial Plan Parameters table define your dial plan. You can set system-wide parameters for your dial plan, or define a Dial Plan Parameters table according to each location.

Uniform dial plan

To Administer a Uniform Dial Plan, you can set up a Uniform Dialing Plan that can be shared among a group of servers. For more information, see Avaya Aura® Communication Manager Feature Description and Implementation.