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RS232 with RJ Adaptors/Cable

EIA RS232D Std Yost Std Cisco Std DEC MMJ Std
Straight Rollover Rollover Rollover
Pin# Signal Direction Pin# Signal Direction Pin# Signal Direction Pin# Signal Direction
1 DSR <<< 1 CTS <<< 1 RTS >>>
2 DCD <<< 2 DCD (DSR) <<< 2 DTR >>> 1 DTR >>>
3 DTR >>> 3 RD <<< 3 TD >>> 2 TD >>>
4 GND 4 GND 4 GND 3 GND
5 RD <<< 5 GND 5 GND 4 GND
6 TD >>> 6 TD >>> 6 RD <<< 5 RD <<<
7 CTS <<< 7 DTR >>> 7 DSR (DCD) <<< 6 DSR <<<
8 RTS >>> 8 RTS >>> 8 CTS <<<

(c) 2002 Hugo Villeneuve
$Id: modular_connector.html,v 1.5 2024/05/28 06:39:48 harpagon Exp $