# AppleLine RS232

(at the computer)

25 PIN D-SUB MALE at the computer.

Pin | Name | Dir | Description
--- | --- | --- | ---
1 | SNG |  | Shield ground
2 | TXD |  | Tx Transmit Data, Out
3 | RCD |  | Rx Receive Data, In
4 | RTS |  | Request to Send, Out
5 | CTS |  | Clear to Send, In
6 | DSR |  | Data Set Ready, In
7 | GND |  | Ground
8 | DCD |  | Data Carrier Detect, In
9 | n/c |  | No connection
10 | n/c |  | No connection
11 | n/c |  | No connection
12 | CH |  | Data signal rate selector, In
13 | n/c |  | No connection
14 | n/c |  | No connection
15 | n/c |  | No connection
16 | n/c |  | No connection
17 | n/c |  | No connection
18 | n/c |  | No connection
19 | n/c |  | No connection
20 | DTR | Terminal Ready Signal, Out
21 | n/c |  | No connection
22 | CE |  | Ring indicator, In
23 | n/c |  | No connection
24 | n/c |  | No connection
25 | n/c |  | No connection

Contributor: Joakim Ögren

Source:
Apple Tech Info Library 1184: AppleLine Pinouts at Apple TIL homepage

Copyright © The Hardware Book Team 1996-2001.
May be copied and redistributed, partially or in whole, as appropriate.
Document last modified: 2001-06-07