Information Technology Reference
In-Depth Information
Table16-5 show isdn status for BRI (continued)
Field
Significance
Layer 1 Status:
DEACTIVATED
(continued)
The ISDN BRI port of a router might require an NT1
device. In ISDN, NT1 is a device that provides the
interface between the customer premises equipment
and central office switching equipment. If the router
does not have an internal NT1, obtain and connect an
NT1 to the BRI port. Make sure that the BRI or
terminal adapter is attached to the S/T port of the NT1.
Refer to the manufacturer's documentation to verify
correct operation of the external NT1.
•
The line might not be functioning. Contact the carrier
to confirm operation of the connection and to verify
the switch type settings.
•
Make sure that the router is functioning correctly. If
there is faulty or malfunctioning hardware, replace as
necessary.
•
