Paradyne 9820-8M Manual De Usuario
Connectors, Cables, and Pin Assignments
C-8
9820-A2-GB20-20
June 2000
X.21 DTE Adapter Cable (Models 9820, 9820-2M, 9820-8M)
This adapter is used to connect the user data port to a DTE with an X.21 cable.
It is a 25-pin EIA-530A-to-15-pin X.21 (DB25-to-X.21) adapter cable.
It is a 25-pin EIA-530A-to-15-pin X.21 (DB25-to-X.21) adapter cable.
This cable (Part No. 035-0302-0131) is part of the X.21 Cable Kit (Feature
No. 9008-F1-521).
No. 9008-F1-521).
98-15883
The following table provides the pin assignments for the DB25-to-X.21 adapter
cable.
cable.
Signal
ITU #
25-Pin
Plug
Pin #
Plug
Pin #
Direction
15-Pin
Socket
Pin #
Socket
Pin #
Transmit Data ( TXD )
103
2 ( A )
14 ( B )
14 ( B )
To DCE
2 ( A )
9 ( B )
9 ( B )
Received Data ( RXD )
104
3 ( A )
16 ( B )
16 ( B )
From DCE
4 ( A )
11 ( B )
11 ( B )
Received Signal Element Timing
( RXC ) — DCE Source
( RXC ) — DCE Source
115
17 ( A )
9 ( B )
9 ( B )
From DCE
6 ( A )
13 ( B )
13 ( B )
Request to Send ( RTS )
105
4 ( A )
19 ( B )
19 ( B )
To DCE
3 ( A )
10 ( B )
10 ( B )
Data Channel Received Line
Signal Detector ( RLSD or LSD )
Signal Detector ( RLSD or LSD )
109
8 ( A )
10 ( B )
10 ( B )
From DCE
5 ( A )
12 ( B )
12 ( B )
Transmit Signal Element/
Terminal Timing ( TT ) —
DTE Source
Terminal Timing ( TT ) —
DTE Source
113
24 ( A )
11 ( B)
11 ( B)
To DCE
7 ( A )
14 ( B )
14 ( B )
Signal Ground/Common ( SG )
102
7
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8