Cables, Connectors, and Pin Assignments
E-8 9161-A2-GH30-30April 1998
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