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4.1 Troubleshooting
112 Installation Manual
4.1 Troubleshooting
4.1.1 Installation
PROBLEM PROBABLE CAUSE SOLUTION
Extension does not operate. Bad extension card. • Exchange the card for a known working
one.
Bad connection between the
PBX and telephone.
• Take the telephone and plug it into the
same extension port using a short
telephone cord. If the telephone works,
then the connection between the PBX
and the telephone must be repaired.
A telephone with an A-A1 relay
is connected.
• Use a 2-wire cord.
• Set the A-A1 relay switch of the
telephone to the "OUT" or "OFF"
position.
Bad telephone. • Take the telephone and plug it into
another extension port that is working.
If the telephone does not work, replace
the telephone.
The PBX does not operate
properly.
• Press the Reset Button (refer to "4.1.4
Using the Reset Button").
• Turn off the power switch, and then turn
it back on.
• Turn off the power switch, and then
unplug the PBX. After 5 minutes, plug
the PBX back in and turn the power
switch back on.
Noise on external paging. Induced noise on the wire
between the PBX and the
amplifier.
• Use a shielded cable as the connection
wire between the PBX and amplifier. A
short shielded cable is recommended.
Distorted external music. Excessive input level from
external music source.
• Decrease the output level of the
external music source by using the
volume control on the music source.
Alternate Calling—Ring/Voice
and Live Call Screening (LCS)
do not function as set when using
a Wireless Phone (KX-T7880/
KX-T7885/KX-TD7894/KX-
TD7895).
Voice-calling mode and Hands-
free mode with LCS are not
available with Wireless Phones.
• Switch the calling mode to ring-calling.
• Set the LCS mode to "Private".
The ALARM indicator on the
front of the cabinet turns on red.
A major system error occurs in
the PBX.
• See the error log using the KX-TAW848
Maintenance Console (refer to "4.1.5
Troubleshooting by Error Log").