A-19
Cable Specifications
Synchronous Serial Cable Assemblies and Pinouts
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Table A-12. X.21 DCE Cable Pinouts (DB-60 to DB-15)
60 Pin
Signal
Description
Direction
15 Pin
Signal
J1-48
J1-47
GND
MODE_2
Shorting group
–
–
–
J1-46
Shield_GND
Single
–
J2-1
Shield GND
J1-28
J1-27
RxD/TxD+
RxD/TxD–
Twisted pair no. 6
<—
<—
J2-2
J2-9
T
Transmit–
J1-1
J1-2
CTS/RTS+
CTS/RTS–
Twisted pair no. 1
<—
<—
J2-3
J2-10
Control–
J1-11
J1-12
TxD/RxD+
TxD/RxD–
Twisted pair no. 3
—>
—>
J2-4
J2-11
Receive–
J1-9
J1-10
RTS/CTS+
RTS/CTS–
Twisted pair no. 2
—>
—>
J2-5
J2-12
Ind
Indication–
J1-24
J1-23
TxC/RxC+
TxC/RxC–
Twisted pair no. 4
—>
—>
J2-6
J2-13
Timing–
J1-15
Shield
Control_GND
–
Twisted pair no. 5
–
–
J2-8
Shield
Control GND
–
Summary of Contents for J3138A
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