2-9
ISS 506 Integration Seamless Switcher • Installation
Choosing a network cable
Ethernet links use Category (CAT) 3, 4, 5, 5e, or 6, unshielded twisted pair (UTP)
or shielded twisted pair (STP) cables, terminated with RJ-45 connectors. Ethernet
cables are limited to 328' (100 m).
N
Do not use standard telephone cables. Telephone cables do not support Ethernet
or Fast Ethernet.
N
Do not stretch or bend cables. Transmission errors can occur.
The cable used depends on your network speed. The ISS supports both 10 Mbps
(10Base-T — Ethernet) and 100 Mbps (100Base-T — Fast Ethernet), half-duplex and
full-duplex Ethernet connections.
• 10Base-TEthernetrequiresataminimumCAT3UTPorSTPcable.
• 100Base-TFastEthernetrequiresataminimumCAT5UTPorSTPcable.
Wiring the network cable
The cable can be terminated as either a patch cable or a crossover cable (figure 2-13)
and must be properly terminated for your application:
• Patch (straight) cable — Connection of the ISS to an Ethernet hub, router, or
switch that also hosts a controlling computer
• Crossover cable — Direct connection between the ISS and a controlling
computer
A cable that is wired as T568A at one end
and T568B at the other (Tx and Rx pairs
reversed) is a "crossover" cable.
A cable wired the same at both ends is
called a "straight-through" cable, because
no pin/pair assignments are swapped.
12345678
RJ-45
Connector
Insert Twisted
Pair Wires
Pins:
Crossover Cable Straight-through Cable
Pin
1
2
3
4
5
6
7
8
Wire color
White-green
Green
White-orange
Blue
White-blue
Orange
White-brown
Brown
Wire color
T568A T568B
End 1 End 2 End 1 End 2
White-orange
Orange
White-green
Blue
White-blue
Green
White-brown
Brown
Pin
1
2
3
4
5
6
7
8
Wire color
White-orange
White-green
Blue
White-blue
White-brown
Brown
Wire color
T568BT568B
White-orange
OrangeOrange
White-green
Blue
White-blue
GreenGreen
White-brown
Brown
Figure 2-13 — RJ-45 connector pinout table
