Filter
Top Products
30 CHAPTER 3: TROUBLESHOOTING
Solving NBX
Telephone
Problems
If power is not reaching an NBX Business Telephone, use the information
in Table 7 to resolve the problem.
Table 7 Solving NBX Business Telephone Problems
Problem Possible Cause Suggested Action
No characters appear in
the telephone LCD display.
Faulty connection ■ Verify all physical connections.
The telephone may
be faulty.
■ Supply power to the
telephone using the standard
external adapter that comes
with the telephone. If any
characters appear in the LCD
display, the telephone is not
faulty.
Note: You do not need to
connect the telephone to the
Ethernet to perform this check.
Faulty Ethernet
cable between the
telephone and the
wall jack
■ Take the telephone and the
Ethernet cable to the EPS
location and connect the
telephone directly to an EPS
output port (one of the top
row of connectors).
■ If information does not appear
in the LCD display, replace the
Ethernet patch cable, being
sure to use one that is wired
for all eight pins.
Note: If information appears in
the LCD display, the EPS,
telephone, power splitter, and
Ethernet patch cable are fully
functional.
Faulty EPS port ■ Plug the telephone into
another EPS output port.
Faulty power
splitter
■ Replace the power splitter.
Faulty connection
between the wall
jack and the EPS
■ Verify that the Ethernet wall
jack is connected to the EPS. If
that is not the source of the
problem, check the cables and
connections between the wall
jack and the EPS.