5.1.3 Operation
PROBLEM
• When using the
speakerphone mode with
an APT, nothing is
audible.
• When using the
speakerphone/monitor
mode with a DPT, nothing
is audible.
• The unit does not ring.
• During a power failure,
extensions assigned for
power failure operation do
not operate.
• Originating an outside
call, Call Transfer, or
Conference cannot be
performed.
Installation Manual
PROBABLE CAUSE
• The HANDSET/
HEADSET selector is set
to the "HEADSET"
position.
• The "HEADSET" mode
is selected by Station
Programming, "Handset/
Headset Selection."
• The Ringer Volume
Selector is set to "OFF."
• A DPT or APT is
connected to the
extension port.
• The dialing mode (tone or
pulse) is improper.
• The corresponding CO
button does not exist on
the PT.
POSSIBLE SOLUTION
• When the headset is not used, set the
HANDSET/HEADSET selector to
the "HANDSET" position.
• When the headset is not used, select
the "HANDSET" mode by Station
Programming.
• Set to "HIGH" or "LOW."
• Disconnect the DPT or APT and
connect an SLT.
• Set the Tone/Pulse switch to the
other position.
• Program the CO button. Please refer
to "Flexible CO Key Assignment" of
Section "4.3 Extension Line" in the
Programming Guide.
Troubleshooting
277