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").
Installation Manual 137
5.1.1 Installation
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