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4.1 Troubleshooting
Installation Manual 159
4.1.3 Operation
PROBLEM PROBABLE CAUSE SOLUTION
• When using the
speakerphone on an
APT, nothing is audible.
• The HANDSET/
HEADSET selector is
set to the "HEADSET"
position.
• When the headset is not used, set the
HANDSET/HEADSET selector to the
"HANDSET" position.
• When using the
speakerphone/monitor
mode with a DPT,
nothing is audible.
• The "HEADSET" mode
is selected by Personal
Programming,
"Handset/Headset
Selection".
• When the headset is not used, select
the "HANDSET" mode by Personal
Programming.
• The PT does not ring. • The ringer volume is off. • Turn on the ringer volume.
• During a power failure,
extensions connected to
ports 1 and 2 of hybrid
extension ports do not
operate.
• A DPT or APT is
connected to the
extension port.
• The dialling mode (tone
or pulse) is incorrect.
• Disconnect the DPT or APT and
connect an SLT.
• Set the Tone/Pulse switch to the other
position.
• Originating an outside
call, call transfer, or
conference cannot be
performed.
• The corresponding CO
button does not exist on
the PT.
• Programme the CO button. Refer to
"1.18.2 Flexible Buttons" in the Feature
Guide.