Network Technologies CAT5 User Manual
36
NULL MODEM CABLE PINOUTS
PRIMUX to Terminal (9 PIN) null modem cable
PRIMUX to Terminal (25 PIN) null modem cable
( NTI cable part # DINT-xx-FF)
PRIMUX
TERIMINAL
PRIMUX
TERMINAL
9 pin
Signal
9 pin
9 pin
Signal
25 pin
Function
Pin #
Direction
Pin #
Function
Function
Pin #
Direction
Pin #
Function
RxD
2
3
TxD
RxD
2
2
TxD
TxD
3
2
RxD
TxD
3
3
RxD
CTS
8
N/C
7
RTS
CTS
8
N/C
4
RTS
RTS
7
N/C
8
CTS
RTS
7
N/C
5
CTS
DSR
6
N/C
4
DTR
DSR
6
N/C
20
DTR
DTR
4
N/C
6
DSR
DTR
4
N/C
6
DSR
DCD
1
N/C
1
DCD
DCD
1
N/C
8
DCD
SG
5
5
SG
SG
5
7
SG
N/C= not connected (no cable wire)
In this cable signals CTS and RTS are connected to each other at the connector ends, and
signals DSR, DTR, and DCD are connected to each other at the connector ends.
In this cable signals CTS and RTS are connected to each other at the connector ends, and
signals DSR, DTR, and DCD are connected to each other at the connector ends.
Note: Cable length not to exceed 15ft.
Mating Face
of 25D
Female Connector
1
14
25
13
1
Mating Face
of 9D
Male Connector
2
3
4
5
6
7
8
9
9 D F e m a l e
x x = 6 , 1 0 , 1 5 F E E T
9 D F e m a l e
N T I D I N T - x x - F F