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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:
"0–255.0–255.0–255.0–255" (except
0.0.0.0 and 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.
• Whenever you try to
make calls using a SIP
Extension, a busy tone
is heard.
• The status of the port
that the SIP Extension
is
connected to is Out of
Service.
• Change the port status from Out of
Service to In Service using the
Maintenance Console.
• 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
port 1 of DHLC4 card
do not operate.
• A DPT or APT is
connected to the
extension port.
• The dialing mode (tone
or pulse) is incorrect.
• Disconnect the DPT or APT and connect
an SLT.
• Set the Tone/Pulse switch to the other
position.
Document Version 2011-10 Installation Manual 125
5.1.3 Operation