3Com NBX 100, Руководство по установке

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94 C
HAPTER
2: C
ONFIGURING THE
D
IAL
P
LAN
8 To remove an extension from the scroll list, highlight it the Devices Using
Table scroll list and click >>. The extension moves to the
Devices not
Using Table scroll list.
9 Click Close when you are finished.
Removing a Dial Plan
Table
This section tells you how to remove a Dial Plan table. Note that you must
not remove any of the pre-defined tables (Internal, Incoming, or Least
Cost).
CAUTION: You cannot remove a Dial Plan table if a device is using it. To
remove the table, you must first remove all devices from the Devices
Using Table list.
To remove a Dial Plan table:
1 From the Dial Plan window (Figure 15), click the Tables tab. The Tables
window appears (Figure 26).
2 Highlight the table you want to remove.
3 Click Remove . A dialog box prompts you to confirm the removal.
Managing Dial Plan
Pretranslators
Pretranslators
are tables in the Dial Plan configuration file. Each entry in a
Pretranslator table contains a string of one or more digits that are
compared to incoming or outgoing digits. When the digits match an
entry in the table, the NBX 100 performs any associated Pretranslator
operations.
Each Pretranslator operation performs a digit manipulation operation on
the dialed digits. For incoming calls, if the DID/DDI range matches the
internal extensions, the dial plan does not require a Pretranslator;
however, you can use Pretranslators to map non-matching dialed
numbers on an incoming DID/DDI channel to desired internal extensions.
Pretranslator Example 1:
Assume that the telephone company passes 4-digit numbers to the NBX
100 for each incoming telephone call (for example, numbers in the range
5200 to 5300). If the NBX 100 uses 3-digit extensions in the range 200 to
300, you could define a single pretranslation operation that performed a
stripLead to remove the first digit. The NBX 100 could remove the
number five from an incoming number such as 5278, and pass the call to
extension 278. See “Sample Solutions Using Dial Plan Configuration File