RS-232 and other serial ports and interfaces  > Apple pinouts
Pin Name Dir Description
1SNG---Shield ground
2TXD-->Tx Transmit Data, Out
3RCD<--Rx Receive Data, In
4RTS-->Request to Send, Out
5CTS<--Clear to Send, In
6DSR<--Data Set Ready, In
8DCD<--Data Carrier Detect, In
9n/c No connection
10n/c No connection
11n/c No connection
12CH<--Data signal rate selector, In
13n/c No connection
14n/c No connection
15n/c No connection
16n/c No connection
17n/c No connection
18n/c No connection
19n/c No connection
20DTR-->Terminal Ready Signal, Out
21n/c No connection
22CE<--Ring indicator, In
23n/c No connection
24n/c No connection
25n/c No connection
25 pin D-SUB male connector layout
25 pin D-SUB male connector
at the computer
According to 1 reports in our database (0 positive and 0 negative) this pinout may be incorrect.

Is this pinout
Source(s) of this and additional information: Apple Tech Info Library 1184: AppleLine Pinouts at Apple TIL homepage, from Hardware Book
This page contain parts under Copyright © 2000-2018 by team.
No portion of this webpage may be reproduced in any form without providing visible HTML link to . Webmaster permission required in any other cases.
Efforts have been made to ensure this page is correct, but it is the responsibility of the user to verify the data is correct for their application.