Planning the System
Understanding the Dial Plan
62
Administrator’s Guide for Avaya Communication Manager
November 2003
So, if you have a single-carrier cabinet, the circuit pack in slot 06 would have the address 01A06. If you
want to attach a phone to the 3rd port on this board, the port address is 01A0603 (01=cabinet, A=carrier,
06=slot, 03=port).
Understanding the Dial Plan
Your dial plan tells your system how to interpret dialed digits. For example, if you dial 9 on your system
to access an outside line, it is actually the dial plan that tells the system to find an external trunk when a
dialed string begins with a 9.
The dial plan also tells the system how many digits to expect for certain calls. For example, the dial plan
may indicate that all internal extensions are 4-digit numbers that start with 1 or 2.
Let us take a look at an example dial plan so you’ll know how to read your system’s dial plan. The
following figure shows an example of a simple dial plan.
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. For example, this dial plan shows that when users dial a 5-digit
number that starts with 3, they are dialing an extension.
The Dial Plan Analysis Table in our example contains the following call types:
•
Attendant (attd) — Defines how users call an attendant. Attendant access numbers can be any
number from 0 to 9 and contain 1 or 2 digits.
In our example figure, the system calls an attendant when users dial 0.
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DIAL PLAN ANALYSIS TABLE
Percent Full: 9
Dialed Total Call
Dialed Total Call
String Length Type
String Length Type
0
1
attd
__
_
____
1
3
dac
__
_
____
3
5
ext
__
_
____
4
6
ext
__
_
____
5
7
ext
__
_
____
*
3
fac
__
_
____
#
3
fac
__
_
____