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23
ASYNC 232
↔
422/530 CARD
4.3.3 P
OINT
-
TO
-P
OINT
T
WISTED
-P
AIR
C
ONNECTION
The six-position RJ-11 and eight-position RJ-45 jack options for the Async
232
↔
422/530 Card (always the two
upper
jacks on the rear interface card)
are prewired for a standard telco wiring environment. Connection of a 4-wire
twisted-pair circuit between two or more Async 232
↔
422/530 Cards requires
a crossover cable. Refer to the next page for more information.
CROSSOVER CABLES
RJ-11
Signal
Pin No.
Color
‡
Color
Pin No.
Signal
GND
†
1
Blue ................White
6
GND
†
RCVB
2
Yellow.............Red
4
XMTB
XMTA
3
Green .............Black
5
RCVA
XMTB
4
Red.................Yellow
2
RCVB
RCVA
5
Black...............Green
3
XMTA
GND
†
6
White ..............Blue
1
GND
†
RJ-45
Signal
Pin No.
Color
‡
Color
Pin No.
Signal
GND
†
2
Orange ...........Brown
7
GND
†
RCVB
3
Black...............Green
5
XMTB
XMTA
4
Red.................Yellow
6
RCVA
XMTB
5
Green .............Black
3
RCVB
RCVA
6
Yellow.............Red
4
XMTA
GND
†
7
Brown .............Orange
2
GND
†
IMPORTANT!
In the pinouts above, “A” means positive and “B” means negative.
†
Connection to ground is optional
‡
Standard color codes—yours may be different