Installation guide

Cabling Specifications A-55
Serial Cables
X.21 Octal Serial Cable Assembly
Figure A-11 shows the compact octal cable used on the NP-2T16S-X21 module.
Table A-22 lists pinouts for the DTE cable, and Table A-23 lists pinouts for the DCE cable.
J1-1
J1-2
CTS/RTS+
CTS/RTS–
Twisted pair no. 1 <—
<—
J2-3
J2-10
Control+
Control–
J1-11
J1-12
TXD/RXD+
TXD/RXD–
Twisted pair no. 3 —>
—>
J2-4
J2-11
Receive+
Receive–
J1-9
J1-10
RTS/CTS+
RTS/CTS–
Twisted pair no. 2 —>
—>
J2-5
J2-12
Indication+
Indication–
J1-24
J1-23
TXC/RXC+
TXC/RXC–
Twisted pair no. 4 —>
—>
J2-6
J2-13
Timing+
Timing–
J1-15
Shield
Control_GND
–
Twisted pair no. 5 –
–
J2-8
Shield
Control GND
–
Table A-21 Four-Port Serial X.21 DCE Cable Pinouts (DB-60 to DB-15)
(Continued)
60 Pin Signal Name Type
Directio
n 15 Pin Signal Name