A1 Troubleshooting
36 Information about IP Proprietary Telephones
A1 Troubleshooting
A1.1 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: "1.0.0.0" to
"255.255.255.254"
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
Hybrid IP-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 (refer to "4.2.2 Setting the
VLAN Parameters").