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2.3 Choosing the right device

Some operating systems provide two separate devices for each serial line, one of which is intended especially for gettys. This is NOT a good idea, because it won’t work with mgetty. It is meant for modems used in auto-answer mode.

mgetty picks up the phone by hand, this will only work properly if you use the same device you would use for dialing out. (Some people like to create a symlink /dev/modem for this, but you have to be consistent and use this for all comm programs if you do - otherwise you’ll run into problems with the lock file names).

Here are some examples for different systems: