ST 500 "Piranha" Operation Manual: Supplement #3 - Reference Information
86
A crossover connection between two computers is also possible as illustrated in the tables
below, but such connections are rare.
1
st
connector #
Color of wire
2
nd
connector #
scheme 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
scheme 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
12.5. WIRING SCHEME OF A THREE, TWO, AND ONE TWISTED PAIR CABLE
RJ connector pin #
RJ25 RJ14 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
12.6. REFERENCE INFORMATION ON TELEPHONE LINES
There are analog, hybrid, and digital PBXs
in circuits of analog PBXs signals are transmitted in the analog form
in a digital PBX, the voice signal is converted into digital signal
in a hybrid PBXs, analog signal in the speech frequency band is transmitted without conversion.
The term
"
hybrid
"
means that system and analogue phone sets can be plugged in.
