ATL Telecom R1-SW Ethernet Switch - Manual (Page 296)

R1-SW24L2B User’s Manual
B-4
Cable Specifications
Twisted Pair Cable
The
10/100/1000Base-T ports
on the
uplink modules
are connected by using twisted pair cables
with RJ-45 connectors at both ends.
There are two types of twisted pair cables: UTP (unshielded twisted pair) cable and STP
(shielded twisted pair) cable. The following figure shows a twisted pair cable with RJ-45
connectors at both ends.
According to the speed of devices to be connected: Category-3, 4, 5, 5+, 6
The category of twisted pair cable to be used is determined by the speed of the devices to be
connected to RJ-45 port. In case of connecting with a device that operates at 10Mbps, category 3
and 4 cable is used. In case of connecting with a device that operates at 100Mbps, category 5
cable is used. In case of connecting with a device that operates at 1000Mbps, category 5+ or
category 6 cable is used.
According to the kinds of devices to be connected: Straight-through, Crossover
Either straight-through cable or crossover cable is used according to the kinds of devices to be
connected to RJ-45 port. In case the device to be connected is such terminal (MDI) as PC
equipped with NIC (Network Interface Card), straight-through cable is used. On the other hand,
crossover cable is used for connecting the ports of network devices (MDI-X) such as hub or
switch.