3Com SuperStack 3 NBX, Руководство администратора

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Example: For a 4-digit dial plan, you can set the initial telephone
extension range to 1000–1099. This arrangement allows for up to 100
telephone extensions. Later, you can extend the range up to 3999 to
allow for 400 telephone extensions. By default, the Hunt Group range
starts at 4000 on the SuperStack 3 and 450 on the NBX 100, so you
cannot assign telephone extensions in either of those ranges.
How Auto Discovery
Assigns Extensions
The Auto Discovery process assigns new extensions to telephones and
other devices. For example, if you install a T1 or E1 card, you can use
Auto Discovery to assign extension numbers to each port on the card.
The Auto Discovery process initially assigns a default name
(new user) to
each new telephone, and assigns the next available extension number.
Later, you can replace
(new user) with the appropriate user’s name.
It is possible to bypass the Auto Discovery process and to manually add a
new telephone and assign an extension. However, 3Com strongly
recommends that you take advantage of the Auto Discovery process. For
instructions on using the Auto Discovery process or manually adding and
configuring a new telephone, see the section on
“Adding a New
Telephone” in Chapter 3 .
You can define a user in the system database without assigning a telephone
to that user. By defining a user with no device, but with a telephone
extension only, you create a
phantom mailbox . The NBX system associates
an extension with this phantom mailbox so that the user can have voice
mail capability. To access voice mail from any telephone, the user calls
either extension 500 (the default Auto Attendant extension), or 501 (the
default Auto Attendant voice mail extension.)
Telephones and Line Card ports reserve most of the extensions within the
system. However, there are other extensions within the system. Table 8
shows the default extension ranges for 3-digit and 4-digit dial plans.
Modifying Extensions You can modify the extension number of any device in the system.
Normally, you make changes
only after you have changed the extension
ranges for the NBX system, in order to align the extensions with the new
ranges.
CAUTION: Be very careful when you change extensions. The system does
not validate changes that you make here, and there is no Undo or Cancel
function. A mistake can compromise the operation of the system.