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5.1 Troubleshooting
Installation Manual 241
5.1.3 Operation
PROBLEM PROBABLE CAUSE SOLUTION
• Cannot set the IP address,
subnet mask address, and
PBX IP address to the IP-
PT.
• An unusable value is being
set.
• Set an IP address within the valid
range. IP address of the IP-PT/PBX:
"1.0.0.0" to "223.255.255.255" Subnet
mask address: "0.0.0.0" to
"255.255.255.255"
• Cannot register the IP-PT. • The necessary network
parameters are not set to
the IP-PT.
• When not using a DHCP server, set the
IP address, subnet mask address, and
enter the PBX IP address. If necessary,
also enter the IP address of the default
gateway.
• When using a DHCP server, enter the
PBX IP address.
• The IP-PT cannot connect to
the PBX.
• The wrong IP address,
subnet mask address, PBX
IP address, or default
gateway address was
entered.
• Check each parameter and enter the
correct value.
• The Ethernet cable is not
connected correctly.
• Check the Ethernet cable connections.
• The DHCP server is not
active.
• Restart the DHCP server.
• Disable DHCP and re-enter settings as
appropriate.
• 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 to 4 of MSLC16/
SLC16 and ports 1 to 2 of
DHLC8/SLC8 cards 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 flexible
button does not exist on the
PT.
• Programme the flexible button. Refer to
"1.20.2 Flexible Buttons" in the Feature
Guide.