Panasonic KX-NS500 Installation Manual page 293

PROBLEM
The status of the port
property of an SLT
extension is FAULT.
PROBABLE CAUSE
•
The telephone is
off-hook.
•
There is a problem in
the wiring.
•
The SLT circuitry is
damaged.
SOLUTION
Put the telephone on-hook and restart the
PBX.
Note
This solution does not apply to the power
failure ports (ports 1, 2 on the pre-installed
MCSLC card).
Disconnect all cabling between the PBX and
SLTs, and restart the PBX.
After restarting, if operation is normal, there is
probably a problem in the wiring or
connection. (For example, there might be a
short circuit in the switchboard or cabling.)
Note
This solution does not apply to the power
failure ports (ports 1, 2 on the pre-installed
MCSLC card).
Consult a certified dealer.
7.1.3 Operation
Installation Manual 293