4.11.2 LAN Connections for IP Telephones
Connecting an AC Adaptor to an IP Telephone
IP-PTs and 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.
Use only the specified type of AC adaptor for each IP telephone. For details, refer to the documentation of
your IP telephone.
To Wall Socket
AC Adaptor Cord
Connecting a PC to an IP Telephone
You can connect a PC to some IP telephones (e.g., KX-NT300 series) using the IP telephone's secondary
port. In this case, only a single port from the LAN's network interface (switching hub) is required to connect
both the IP telephone and PC to the LAN.
Use an Ethernet straight cable with an RJ45 connector to connect a PC to the IP telephone. 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.
Only a PC can be connected to the secondary port of an IP telephone. Other IP telephones, including
IP-PTs, or network devices such as routers or switching hubs, cannot be connected.
The secondary port does not support PoE for connected devices.
In cases where a PC is connected to the secondary port, if the IP telephone connection to the PBX is
disconnected or reset, LAN communication to the PC will also be disrupted.
Generally, it is recommended that you connect no more than one PC to the secondary port of each IP