REFERENCE INFORMATION
119
Other options for connecting two PCs using a crossover cable are presented in the table:
1
st
CONNECTOR #
COLOR OF WIRE
2
nd
CONNECTOR #
OPTION #1
1
white and green (TX+)
3
2
green (TX-)
6
3
white and orange (RX+)
1
4
blue
7
5
white and blue
8
6
orange (RX-)
2
7
white and brown
4
8
brown
5
OPTIONS #2
1
white and orange (TX+)
3
2
orange (TX-)
6
3
white and green (RX+)
1
4
blue
7
5
white and blue
8
6
green (RX-)
2
7
white and brown
4
8
brown
5
10.5. WIRING OF A CABLE CONSISTING OF THREE, TWO, AND ONE PAIR OF WIRES
RJ connector pin # RJ25 RJ1
4
RJ11 Contemporary coloring Obsolete coloring
1
X
white and green
orange
2
X
X
white and orange
black
3
X
X
X
blue
red
4
X
X
X
white and blue
green
5
X
X
orange
yellow
6
X
green
blue
10.6. TELEPHONE CABLES
By the type of switching, analog, hybrid and digital PBX are distinguished. Hybrid PBXs differ
from digital in the way they switch signals. In digital PBXs, the voice frequency signal is
converted to a coded digital electrical signal, which is then switched.
