ADTRAN ISU 512 user manual Table D-E, Pinouts

			Appendix D. Pinouts
				Table D-E
				V.35 Pinouts
P i n	N a m e	I n p u t / O u t p u t	D e s c r i p t i o n s
A	Shield	I / O	Shield for Cable
B	SG	I / O	Signal Ground
C	RTS	I	Ready To Send
D	CTS	O	Clear To Send
E	DSR	O	Data Set Ready
F	CD	O	Carrier Detect
H	DTR	I	Data Terminal Ready
J	RI	O	Ring Indicator
P	SD-A	I	Send Data
R	RD-A	O	Receive Data
S	SD-B	I	Send Data (return)
T	RD-B	O	Receive Data (return)
U	TC-A	I	External Transmit	Clock
V	RC-A	O	Receive Clock
W	TC-B	I	External Transmit	Clock (return)
X	RC-B	O	Receive Data (return)
Y	ST-A	O	Send Timing
A A	ST-B	O	Send Timing (return)
K,L	NC	N / A	No Connection
M,N	NC	N / A	No Connection
BB	NC	N / A	No Connection
CC	NC	N / A	No Connection
DD	NC	N / A	No Connection
EE	NC	N / A	No Connection
FF	NC	N / A	No Connection
HH	NC	N / A	No Connection
J J	NC	N / A	No Connection
KK	NC	N / A	No Connection
LL	NC	N / A	No Connection
MM	NC	N / A	No Connection
NN	NC	N / A	No Connection
I = Input, O = Output, N/A = Not Applicable

See Figure D-4.

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