Paradyne 9820-8M Manual De Usuario
Connectors, Cables, and Pin Assignments
C-14
9820-A2-GB20-20
June 2000
The following table provides the pin assignments for the DB25-to-DB25
straight-through cable.
straight-through cable.
Signal
ITU #
25-Pin
Plug
Pin #
Plug
Pin #
Direction
25-Pin
Socket
Pin #
Socket
Pin #
Shield
—
1
—
1
Transmit Data ( TXD )
103
2 ( A )
14 ( B )
14 ( B )
To DCE
2 ( A )
14 ( B )
14 ( B )
Received Data ( RXD )
104
3 ( A )
16 ( B )
16 ( B )
From DCE
3 ( A )
16 ( B )
16 ( B )
Request to Send ( RTS )
105
4, 19
To DCE
4, 19
Clear to Send ( CTS )
106
5, 13
From DCE
5, 13
Data Set (or DCE ) Ready ( DSR )
107
6
From DCE
6
Data Terminal (or DTE ) Ready
( DTR )
( DTR )
108/1, /2
20
To DCE
20
Signal Ground/Common ( SG )
102
7
—
7
Data Channel Received Line
Signal Detector ( RLSD or LSD )
Signal Detector ( RLSD or LSD )
109
8, 10
From DCE
8, 10
Transmit Signal Element Timing
( TXC ) — DCE Source
( TXC ) — DCE Source
114
15 ( A )
12 ( B )
12 ( B )
From DCE
15 ( A )
12 ( B )
12 ( B )
Received Signal Element Timing
( RXC ) — DCE Source
( RXC ) — DCE Source
115
17 ( A )
9 ( B )
9 ( B )
From DCE
17 ( A )
9 ( B )
9 ( B )
Local Loopback ( LL )
141
18
To DCE
18
Loopback/Maintenance ( RL )
140
21
To DCE
21
Transmit Signal Element/
Terminal Timing ( TT ) —
DTE Source
Terminal Timing ( TT ) —
DTE Source
113
24 ( A )
11 ( B)
11 ( B)
To DCE
24 ( A )
11 ( B)
11 ( B)
Test Mode Indicator ( TM )
142
25
From DCE
25