V.35 connection cable pin assignments – Paradyne 7924 User Manual
Page 50
Cable Pin Assignments
B-4
7924-A2-GB20-30
October 1997
V.35 Connection Cable Pin Assignments
The connector that plugs into the rear panel of V.35-compatible units has the
following pin assignments.
CCITT
Code
Pin
Name
Direction
DCE DTE
Function
Description
101
A
PG
Protective Ground
Machine ground
102
B
SG
Signal Ground
Ground reference for all circuits
105
C
RTS
←
Request to Send
DTE has message to send
106
D
CTS
→
Clear to Send
DCE is ready to accept and transmit DTE data
107
E
DSR
→
Data Set Ready
DCE is ready to operate
109
F
RLSD
→
Data Channel
Received Line Signal
Detector
DCE is receiving a carrier signal
108
H
DTR
←
Data Receiver Ready
DTE is ready to operate
141
L
LL
←
Local Loopback
Local loopback
140
N
RDL
←
Loopback/Maintenan
ce
Remote loopback
103
P
TXD
←
Transmit Data (A)
Data generated by DTE
104
R/D
RXD
→
Received Data (A)
Data received by DTE
103
S
TXD
←
Transmitted Data (B)
Data generated by DTE
104
R
RXD
→
Received Data (B)
Data received by DTE
113
U
EXT
CLK
←
Transmitter Signal
Element Time (A)
To help detect center of signaling element on BA
115
V
RSET
→
Receiver Signal
Element Timing (A)
To help detect center of signaling element on BB
113
W
EXT
CLK
←
Transmitter Signal
Element Timing (B)
To help detect center of signaling element on BA
115
X
RSET
→
Receiver Signal
Element Timing (B)
To help detect center of signaling element on BB
114
Y
TSET
→
Transmit Signal
Element Timing (A)
To help detect center of signaling element on BA
114
a
TSET
→
Transmit Signal
Element Timing (B)
To help detect center of signaling element on BB
142
n
TST
→
Test Indicator
Reserved for test