3Com NBX 100, Руководство по установке

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Dial Plan Tables 51
Internal Dial Plan
Table
The Internal Dial Plan table defines the handling of calls placed from
internal devices such as Business Telephones, to a destination; a
destination can be another internal device, such as a local telephone, or
an external telephone line (analog or Digital Line Card) that connects the
NBX 100 to other facilities.
Each table entry contains:
■
The table ID number (always 1 for the Internal Dial Plan Table).
■
The table entry number (a unique number for each entry in the table).
These numbers are usually in ascending order in the table, but you can
change the order.
Example: You can place a new item near other items of the same type
(that begin with the same digit) in order to help you when you
troubleshoot the configuration file.
■
The digit(s) that begin the dial sequence. Either single or multiple
entries can start with the same digit.
Example 1: Most sample tables have a single entry for digit 0 (zero) to
specify how the NBX 100 handles a telephone number which has zero
as the first digit.
Example 2: If you want the NBX 100 to handle calls differently,
depending on whether they start with 90 or 91, you must have one
entry in the table for each of these 2-digit sequences.
■
The minimum number of digits the NBX 100 collects before making a
decision.
Example: If you are using a 4-digit dial plan and the telephone
extensions start with 2, then the table entry with 2 in the
Digits
column typically has 4 in the Min column. Before making a decision,
the NBX 100 would collect all 4 digits of the extension.
■
The maximum number of digits the NBX 100 collects before making a
decision. Often, this value and the Min value are identical, because
you want the NBX 100 to collect a specific number of digits, no more
and no less.
Example 1: For internal extensions you want the NBX 100 to collect
exactly 3 digits (4 in a 4-digit dial plan) before making a decision, so
you would set both Min and Max to 3 (4 in a 4-digit dial plan).
The two columns might be different if the table entry applies to more
than one situation.