3Com SuperStack 3 NBX Administrator's Manual page 261

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 Log in to the NBX NetSet utility using the administrator login ID and
password.
2 In the NBX NetSet - Main Menu window, click System Configuration.
3 In the System Configuration window, click the System Settings tab.
Other check boxes may be selected based upon previous
Auto Discoveries. You do not need to clear these check boxes to install
the E1 card.
4 Click the Auto Discover Digital Line Cards check box. It does not matter if
any of the other check boxes are selected.
5 Click OK.
Inserting the E1 Digital Line Card
You do not need to remove the power cable from the chassis before you
insert the E1 card.
To insert the E1 Digital Line Card into the chassis:
1 Write down the MAC address of the E1 card.
2 Select a slot for the E1 card in the chassis, and use a Phillips screwdriver
to remove the blank faceplate from the slot.
3 Insert the E1 card into the slot.
4 Slide the E1 card into the chassis until you feel it touch the connectors.
5 To seat the E1 card into the connectors, press the front of the card firmly.
Configuring and Managing E1 Digital Line Cards 261