Cables, Connectors, and Pin Assignments
E-8
9161-A2-GH30-20
September 1997
The following table provides the pin assignments for the 25-position Port 1 or
Port 2 connector/interface and a DTE’s 34-position V.35 connector.
Signal
ITU/
CCITT #
25-Pin
Plug
Pin #
Direction
34-Pin
Socket
Pin #
Shield
—
1
—
A
Transmit Data ( TXD )
103
2 ( A )
14 ( B )
To DCE
P ( A )
S ( B )
Received Data ( RXD )
104
3 ( A )
16 ( B )
From DCE
R ( A )
T ( B )
Request to Send ( RTS )
105
4
To DCE
C
Clear to Send ( CTS )
106
5
From DCE
D
Data Set (or DCE ) Ready ( DSR )
107
6
From DCE
E
Signal Ground/Common ( SG )
102
7, 23
—
B
Data Channel Received Line
Signal Detector ( RLSD or LSD )
109
8
From DCE
F
Transmitter Signal Element/
Terminal Timing ( TT ) —
DTE Source
113
24 ( A )
11 ( B)
To DCE
U ( A )
W ( B )
Transmitter Signal Element Timing
( TXC ) — DCE Source
114
15 ( A )
12 ( B )
From DCE
Y ( A )
AA ( B )
Receiver Signal Element Timing
( RXC ) — DCE Source
115
17 ( A )
9 ( B )
From DCE
V ( A )
X ( B )
Local Loopback ( LL )
141
18
To DCE
L
Data Terminal (or DTE ) Ready
( DTR )
108/1, /2
20
To DCE
H
Loopback/Maintenance ( RL )
140
21
To DCE
N
Test Mode Indicator ( TM )
142
25
From DCE
NN
