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.
Wrong type of PSU.
• Replace the PSU with the appropriate type.
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-T7880KX-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
shelf turns on red.
A major system error occurs
in the PBX.
• See the error log using the Maintenance
Console (refer to "4.1.5 Troubleshooting
by Error Log").
260 Installation Manual
4.1.1 Installation
