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Solving NBX Telephone Problems 31
Faulty EPS ■ Follow the procedures
described in Table 6 to
determine if the EPS is faulty.
Telephone receives power,
but date and time do not
appear in the LCD display.
Faulty connection
to the NBX
Network Control
Processor (NCP) in
the NBX chassis.
■ Check all connections
between the telephone and
the NBX chassis (patch cables,
premises wiring, hubs, and
switches)
The NBX NCP is not
operating properly.
■ Check other telephones. If
they are working properly, the
NCP is functioning properly.
Telephone receives power,
date and time appear in
the LCD display, but
telephone does not
operate properly.
The telephone has
lost connection to
the Network
Control Processor.
■ If the date and time appear in
the LCD display, the telephone
previously had a connection to
the NCP, but that connection
has been lost. Verify all
physical connections between
the telephone and the NCP
(patch cables, premises wiring,
hubs, and switches).
The NBX NCP is not
operating properly.
■ Check other telephones. If
they are working properly, the
NCP is functioning properly.
If none of these procedures identifies the problem, contact an authorized 3Com
service representative for additional assistance.
Table 7 Solving NBX Business Telephone Problems (continued)
Problem Possible Cause Suggested Action