Avaya Site Administration Reference
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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.
Communication Manager dial plans
The Communication Manager system allows you to create your dial plan using from three
to seven digits. If you have a MultiVantage R10 or earlier system, see R10 or earlier dial
plans.
The set of three columns on your dialplan indicate how long the dialed string will be for
each type of call. For example, when users dial a 7-digit number that starts with 4, they
are dialing an extension.
The third column may have any of the following codes:
Attendant (attd) — Defines how users call an attendant. Attd access numbers can be
any number from 0 to 9 and contain 1 or more digits.
Dial access codes (dac) — Allows you to use trunk access codes (tac) and feature
access codes (fac) in the same range. For example, you could define the group 100–
199 for dacs, which would allow both facs and tacs in that range. Dial access codes can
start with any number from 1 to 9 and contain up to 4 digits. In recent releases, * and #
also can be the first digit.
Extensions (ext) — Defines extension ranges that can be used on your system.
Feature access codes (fac) only — facs can be any number from 1 to 9 and contain up
to 4 digits. You can use * or #, but only as a first digit. In our example, this company can
use *21 to activate a feature and use #21 to deactivate the same feature.
R10 or earlier dial plans
If you display your dialplan and look at the lower half of the Dial Plan Record screen, you
see the First Digit Table. This table defines the dialing plan for your system.
The rows in the First Digit Table indicate what the system does when the row’s first digit
is dialed. The columns indicate how long the dialed string will be for each type of call. For
example, when users dial a 4-digit number that starts with 2, they are dialing an
extension.
The first digit table may have any of the following codes:
Attendant (attd) — Defines how users call an attendant. Attd access numbers can be
any number from 0 to 9 and contain 1 or more digits.
Dial access codes (dac) — Allows you to use trunk access codes (tac) and feature
access codes (fac) in the same range. For example, you could define the group 300–
399 for dacs, which would allow both facs and tacs in that range. Dial access codes can
start with any number from 1 to 9 and contain up to 4 digits. In recent releases, * and #
also can be the first digit.
Extensions (ext) — Defines extension ranges that can be used on your system.
Feature access codes (fac) only — facs can be any number from 1 to 9 and contain up
to 4 digits. You can use * or #, but only as a first digit. In our example, this company can
use *21 to activate a feature and use #21 to deactivate the same feature.
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