Paradyne 9820-2M - Manual (Page 253)

Connectors, Cables, and Pin Assignments
C-7 9820-A2-GB20-20 June 2000
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).
99-16303
The following table provides the pin assignments for the DB25-to-X.21 network
cable.
Signal ITU #
25-Pin
Socket
Pin #
Direction
15-Pin
Plug
Pin #
Transmit Data ( TXD ) 103 2 ( A )
14 ( B ) To DCE 2 ( A )
9 ( B )
Received Data ( RXD ) 104 3 ( A )
16 ( B ) From DCE 4 ( A )
11 ( B )
Request to Send ( RTS ) 105 4 ( A )
19 ( B ) To DCE 3 ( A )
10 ( B )
Signal Ground/Common ( SG ) 102 7 — 8
Data Channel Received Line
Signal Detector ( RLSD or LSD ) 109 8 ( A )
10 ( B ) From DCE 5 ( A )
12 ( B )
Transmit Signal Element/
Terminal Timing ( TT ) —
DTE Source 113 24 ( A )
11 ( B) To DCE 7 ( A )
14 ( B )
Received Signal Element Timing
( RXC ) — DCE Source 115 17 ( A )
4 ( B ) From DCE 13 ( A )
3 ( B )