v2.17 February 2003
This document describes serial port features other than those which
should be covered by Modem-HOWTO, PPP-HOWTO,
Serial-Programming-HOWTO, or Text-Terminal-HOWTO. It does not cover
the Universal Serial Bus (see the kernel documentation for USB).
It lists info on multiport serial cards. It contains technical info
about the serial port itself in more detail than found in the above
HOWTOs and should be best for troubleshooting when the problem is
the serial port itself. If you are dealing with a Modem, PPP (used
for Internet access on a phone line), or a Text-Terminal, those
HOWTOs should be consulted first.