NetComm Power Over Ethernet NPPOE1001 - Manual (Page 10)

NetComm NPPOE1001 Power over Ethernet Kit YML720Rev1
10 www.netcomm.com.au
Appendix A: Cable Connections
This cable information is provided for your reference only. Please ensure you only connect the
appropriate cable into the correct socket on either this product or your computer.
If you are unsure about which cable to use or which socket to connect it to, please refer to the
hardware installation section in this manual. If you are still not sure about cable connections, please
contact a professional computer technician or NetComm for further advice.
RJ-45 Ethernet Network Ports
RJ-45 Network Ports can connect any networking devices that use a standard LAN interface, such as
a Hub/Switch Hub or Router. Use unshielded twisted-pair (UTP) or shield twisted-pair (STP) cable
to connect the networking device to the RJ-45 Ethernet port. Depending on the type of connection,
10Mbps or 100Mbps, use the following Ethernet cable, as prescribed.
Caution: Please do not use telephone cables. Telephone cables do not support
Ethernet or Fast Ethernet
Ethernet Type Cable Requirements Maximum Length
10BASE-T Category 3 or better, UTP or STP 100 metres
100BASE-TX Category 5 or better, UTP or STP 100 metres
Twisted-pair cabling comes in various grades, or categories. Category 5 is required for Fast Ethernet,
and is also the most reliable and most commonly used category. You can buy UTP Category 5
(Unshielded Twisted Pair) Ethernet cabling in precrimped lengths, or you can crimp your own.
Crimping your own can result in faulty connections if the RJ-45 tips are not attached properly.
Precrimped Category 5 cabling is available at most computer retail stores.
The most reliable and commonly used type of Category 5 cabling used is UTP, or "unshielded
twisted pair." STP, or "shielded twisted pair" wiring is only necessary for network environments
exposed to excessive amounts of electromagnetic interference, or EMI. These environments include
areas with high sources of electrical power, air conditioning, generators, and radio signals.
STP is also used for wiring outdoors.
There are two types of the wiring: Straight-Through Cables and Crossover Cables. Category 5 UTP/
STP cable has eight wires inside the sheath. The wires form four pairs. Straight-Through Cables has
same pinouts at both ends while Crossover Cables has a different pin arrangement at each end.
RJ-45 plug
attached to cable