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