Technical glossary – Icron USB 1.1 Rover 2850 Dual Port Extender User Manual
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Technical Glossary
Category 5 (Cat 5) Network Cabling
Category 5 cable is commonly also referred to as Cat 5. This cabling is available in either solid or stranded
twisted pair copper wire variants and as UTP (Unshielded Twisted Pair) or STP (Shielded Twisted Pair). UTP
cables are not surrounded by any shielding making them more susceptible to electromagnetic interference
(EMI). STP cables include shielding over each individual pair of copper wires and provides better protection
against EMI. Cat 5 has been superseded by Cat 5e cabling which includes improved data integrity to support
high-speed communications.
USB Cables
USB cables have two distinct connectors. The Type A connector is used to connect the cable from a USB
device to the Type A port on a computer or hub. The Type B connector is used to attach the USB cable to a
USB device.
RJ45
The Registered Jack (RJ) physical interface is what connects the network cabling (Cat 5) to the LEX and REX
unit. You may use either the T568A (Table 1) or T568B scheme (Table 2) for cable termination as the extender
uses all four pairs of the cable. RJ45 connectors are sometimes also referred to as 8P8C connectors.
RJ45 Pin Positioning
Table 1 - T568A Wiring
Table 2 - T568B Wiring
PIN
PAIR
WIRE
CABLE COLOR
PIN
PAIR
WIRE
CABLE COLOR
1
3
1
WHITE/GREEN
1
2
1
WHITE/ORANGE
2
3
2
GREEN
2
2
2
ORANGE
3
2
1
WHITE/ORANGE
3
3
1
WHITE/GREEN
4
1
2
BLUE
4
1
2
BLUE
5
1
1
WHITE/BLUE
5
1
1
WHITE/BLUE
6
2
2
ORANGE
6
3
2
GREEN
7
4
1
WHITE/BROWN
7
4
1
WHITE/BROWN
8
4
2
BROWN
8
4
2
BROWN
Pair 2
Pair 3
Pair 1
Pair 4
1 2
3
4 5
6
7 8
W-G G W-O BL W-BL O W-BR BR
Pair 2
Pair 3
Pair 1
Pair 4
1 2
3
4 5
6
7 8
W-O
O W-G
B W-BL
G W-BR
BR
USB Type A
Port
USB Type A
Connector
USB Type B
Connector
USB Type B
Port