Network Cable (Models 9820, 9820-2M, 9820-8M - Paradyne 9820 User Manual

X.21 Network Cable (Models 9820, 9820-2M, 9820-8M)
This cable is used to connect the network data port to an NTU with an X.21
interface. It is a 25-position EIA-530A-to-15-pin X.21 (DB25-to-X.21) cable.
This cable (Part No. 035-0384-1031) is part of the X.21 Cable Kit (Feature No.
9008-F1-521).
The following table provides the pin assignments for the DB25-to-X.21 network
cable.
9820-A2-GB20-20
Signal
Transmit Data ( TXD )
Received Data ( RXD )
Request to Send ( RTS )
Signal Ground/Common ( SG )
Data Channel Received Line
Signal Detector ( RLSD or LSD )
Transmit Signal Element/
Terminal Timing ( TT ) —
DTE Source
Received Signal Element Timing
( RXC ) — DCE Source
June 2000
Connectors, Cables, and Pin Assignments
99-16303
25-Pin
Socket
ITU # Direction
Pin #
103 2 ( A ) To DCE
14 ( B )
104 3 ( A ) From DCE
16 ( B )
105 4 ( A ) To DCE
19 ( B )
102 7 —
109 8 ( A ) From DCE
10 ( B )
113 24 ( A ) To DCE
11 ( B)
115 17 ( A ) From DCE
4 ( B )
15-Pin
Plug
Pin #
2 ( A )
9 ( B )
4 ( A )
11 ( B )
3 ( A )
10 ( B )
8
5 ( A )
12 ( B )
7 ( A )
14 ( B )
13 ( A )
3 ( B )
C-7