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Connectors, Cables, and Pin Assignments
C-12
9820-A2-GB20-20June 2000
The following table provides the pin assignments for the DB25-to-V.35 adapter.
Signal ITU #
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)
Transmit Signal Element Timing
(TXC) — DCE Source
114 15 (A)
12 (B)
From DCE Y (A)
AA (B)
Received Signal Element Timing
(RXC) — DCE Source
115 17 (A)
9 (B)
From DCE V (A)
X (B)
Request to Send (RTS) 105 4 To DCE C
Clear to Send (CTS) 106 5 From DCE D
Data Terminal (or DTE) Ready
(DTR)
108/1, /2 20 To DCE H
Data Channel Received Line
Signal Detector (RLSD or LSD)
109 8 From DCE F
Data Set (or DCE) Ready (DSR) 107 6 From DCE E
Signal Ground/Common (SG) 102 7 — B
Loopback/Maintenance (RL) 140 21 To DCE N
Local Loopback (LL) 141 18 To DCE L
Signal Ground/Common (SG) 102 23 — B
Transmit Signal Element/
Terminal Timing (TT) —
DTE Source
113 24 (A)
11 (B)
To DCE U (A)
W (B)