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242 CHAPTER 3: DEVICE CONFIGURATION
Example: Carriers commonly pass either the last three digits or last four
digits of the number for each incoming call.
Sometimes the last digits of the telephone numbers that the carrier
assigns to you do not match the telephone extension numbers that you
want to use for internal calls. You can create entries in your Dial Plan
configuration file to translate the incoming numbers into the
corresponding extension numbers.
Example: You want to use internal extensions from 4000 through 4999,
but the local telephone carrier assigns you numbers from 617-555-3500
through 617-555-4499. You can create translator entries in the Dial Plan
configuration file to translate an incoming digit sequence such as 3795
into extension number 4295, and a sequence such as 4213 into 4713.
The configuration requires several translator entries to handle subsets of
the total range. A unique set of entries handles incoming digit sequences
from 3500 through 3599, from 3600 through 3699, and each of the
other sequences in which the first two digits are unique in the range from
37XX through 44XX.
If the DDI/DID numbers match your internal extension numbers, the
translator entries in your Dial Plan configuration file can be much simpler.
Example: You plan to use internal extensions from 100 through 299,
and the local telephone company assigns you numbers from
617-555-4100 through 617-555-4299. If the local telephone carrier
passes you three digits, you need no translator entries in the Dial Plan
configuration file. If the carrier passes you four digits, you could add a
single set of translator entries to the configuration file to remove the first
digit (4) and use the remaining three digits as the internal extension.
Enabling Auto Discovery for Digital Line Cards
To enable Auto Discovery for Digital Line Cards:
1 Select NBX NetSet > System Configuration > System Settings >
System-wide.
2 Click the Auto Discover Digital Line Cards check box (may already be
selected).
Other check boxes may be selected based on previous Auto Discoveries.
You do not need to clear these check boxes to install the T1 Digital Line
Card. However, it is good practice to clear all check boxes other than the