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PROBLEM PROBABLE CAUSE SOLUTION
Extensions (except IP-PT/
SIP Extension) do not
operate.
Extension card
malfunction
Replace the corresponding card.
Poor connection
between the PBX and
the extension
Take the extension and plug it into the
same extension port using a short
telephone cord. If the extension works,
then the connection between the PBX and
the extension must be repaired.
A telephone with an
A-A1 relay is
connected.
Make sure that a 2-wire cord is used.
Make sure that the A-A1 relay switch of
the telephone is in
"OUT" or "OFF"
position.
Extension malfunction Take the extension and plug it into
another extension port that is working. If
the extension does not work, replace the
extension.
The PBX does not operate
properly.
Press the Reset Button (refer to
"5.1.4 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 Maintenance
Console (refer to "5.1.5 Troubleshooting
by Error Log").
Document Version 2011-10 Installation Manual 121
5.1.1 Installation
121


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