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SCO Unix Serial Communications and UUCP

This article is from a FAQ concerning SCO operating systems. While some of the information may be applicable to any OS, or any Unix or Linux OS, it may be specific to SCO Xenix, Open There is lots of Linux, Mac OS X and general Unix info elsewhere on this site: Search this site is the best way to find anything.

What special considerations are there regarding my Telebit modem?

If you are using Telebit UUCP spoofing (S111=30), the modem spoofing firmware will only negotiate a 3-window connection, so changing the window size to 7 will not do anything for spoofed connections. It will, however, be effective for non-spoofed connections (i.e. if you connect to a site which is not using a Telebit modem).

Some people have reported problems with Telebit modems and UUCP-g spoofing when they change their window and/or packet sizes. Apparently, Telebits can handle requests for increased window sizes without error (though they will only use a maximum window size of 3), but will not work correctly with large packets (probably above the SCO default of 64 bytes).

There is a bug in version LA 5.00W of the Telebit Worldblazer firmware that causes uucico+ADM to fail in startup when the answering uucico is set for windows.

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