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24–1
Chapter 24
ZyXEL MODEMS AND ATARIS
All external models of the ZyXEL 2864 series may be connected to Atari comput-
ers. The factory settings should work just fine with your Atari computer.
Cable
The standard Atari ST, Mega ST and Falcon 030 models provide just a single serial
port, while the Mega STE and TT are equipped with 3 or 4 serial ports. Not all
ports provide all of the signals which are needed for truely reliable communication.
On the Atari ST, the port is a male 25-pin connector. On the other models, it is a
male 9-pin connector.
To connect an Atari to your modem, you need a 9-wire cable:
Atari
Signal ZyXEL
ST TT STE/TT/
Falcon
STE/TT STE/TT
25-pin Serial 1
9-pin
Serial 2
9-pin
Modem1
9-pin
Modem2
9-pin
8111 – CD8
3 2 2 2 2 RXD 3
2 3 3 3 3 TXD 2
20 4 4 4 4 (on) DTR 20
7 5 5 5 5 Ground 7
6 6 6 – – DSR 6
4777 7 (on) RTS 4
5888 – CTS5
22 – 9 9 – RI 22
12345
6789
1 2 3 4 5 6 7 8 9 10 11 12 13
14 15 16 17 18 19 20 21 22 23 24 25
Fig. 24.1: Serial connectors of the Atari computers