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22–1
Chapter 22
ZyXEL MODEMS AND UNIX
Hints for Unix Setups
Cable
Please consult the documentation that came with your workstation to find the part
number of or information on how to make a serial cable for your workstation. The
cable should be a hardware-handshaking cable. Please refer to Appendix A for a
complete list of signals provided by the modem its serial port.
Installation
Modem settings
Unix environments usually don’t like modem responses or echoing of commands.
Therefore you should set ATE0Q1. If you plan to install a dial-in line, don't forget
to set the S-register S0 to a value other than 0 (e.g. ATS0=2) for auto-answer. De-
pending on your kind of Unix, the cable and software used, you may have to disa-
ble carrier detection using AT&C0.
Unix system files
If you wish to use your modem for dial-out connections, you only need appropriate
software, but no changes to system files are necessary. You need to generate infor-
mation or activate entries in at least two system files. If you wish to use your mo-
dem for dial-in connections, these files are
/etc/inittab
and
/etc/gettydefs
.
In
/etc/inittab
, you define which
getty
to use along with some parameters.
The final parameter on the definition line is a tag which points to an entry in the
file
/etc/gettydefs
discussed next. An example for your entry in
/etc/inittab
might be:
s1:45:respawn:/usr/lib/uucp/uugetty -mt60 -r- ttys01 MMULTI
The parameter
ttys01
should be replaced by the actual name of the used serial
port.