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•
Make sure to create a spanning tree for LAN connection in order to prevent loops from occurring in a
multi-bridged environment. Otherwise, some packets may circulate for long periods of time and
eventually system performance may degrade.
•
When using the VLAN feature on the network, make sure that the Control Box is connected to a layer
2 switch that is IEEE 802.1Q compliant, and that is configured for VLANs. In addition, the port of the
switching hub to which the Control Box is connected must be set to "Untagged". Consult your network
administrator for details.
3.4.2 LAN Connections for IP Telephones
When an IP telephone is connected to the LAN and power is supplied for the first time, you will need to set
network parameters. The network parameters must be set for the IP telephone before it can be used. Refer
to "4.5 Assigning Networking Information to IP Telephones" for instructions.
Connecting an IP Telephone to a Switching Hub
When connecting an IP telephone to the LAN, connect it to a switching hub.
Note
•
Use an Ethernet straight cable with an RJ45 connector to connect the IP telephone to a switching
hub. The cable should be a CAT 5 (Category 5) or higher for 10BASE-T/100BASE-TX, or CAT 5e
(Enhanced Category 5) or higher for 1000BASE-T.
•
When using the VLAN feature on the network, make sure that the switching hub to be connected is
IEEE 802.1Q compliant and is configured for VLANs. In addition, the port of a switching hub that the
IP telephone is connected to must be set to "Trunk" port, to allow VLAN tagging. Consult your network
administrator for details.
Connecting an AC Adaptor to an IP Telephone
Some SIP phones comply with the IEEE 802.3af Power-over-Ethernet (PoE) standard. If PoE is available on
your network, these IP telephones can receive the necessary power supply from the network through the
network cable. In this case, no AC adaptor is needed for the IP telephones.
However, if PoE is not available, you will need to connect an AC adaptor to the IP telephone.
Note
Use only the specified type of AC adaptor for each IP telephone. For details, refer to the documentation
of your IP telephone.
3.5 Starting the Control Box
WARNING
Make sure that the AC outlet is properly earthed, then securely connect the 3-pin AC plug
including the earthed pin.
CAUTION
•
Before touching the unit, discharge static electricity by touching ground or wearing an earthing strap.
Failure to do so may cause the unit to malfunction due to static electricity.
•
Once you have started the unit, if you unplug the unit, do not initialise it again as described in "System
Initialisation Procedure". Otherwise, your programmed data will be cleared. To restart the unit, refer to
"6.1.3 Restarting the Control Box".
•
The power supply cord is used as the main disconnect device. Ensure that the AC outlet is located
near the equipment and is easily accessible.
3.4.2 LAN Connections for IP Telephones
Installation Manual
35
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Troubleshooting
