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A computer terminal that uses the serial ports as the physical link
for input.
As old as Methuselah [1] but still useful for accessing remote
computers (and that includes some access points - (minitar [2]).
It's used when there is no need for a physical terminal (monitor and
keyboard) or it would be impractical to have one and while it's a slow
protocol, when compared to Ethernet, it's fast enough for typing and
text display.
While Telnet [3] or SSH [4] are well suited to the task they require
a working ethernet connection, a serial links offer redundancy as it
uses the serial port (ttyS- or Com port) . For a computer/access point
located in an inaccessable location (mounted on a mast or in a roof
cavity) redundancy becomes especially important
Under Linux [5], the kernel may be compiled to load a serial as
console [6] on boot up. This allows the bootloader Grub [7] or Lilo to
be accessed and the display of all the boot messages via the remote
serial terminal.
Links:
------
[1]
http://wikipedia.lotsofinformation.com/wikipedia/index.php?title=Methuselah
[2] http://melbournewireless.org.au/?minitar
[3] http://melbournewireless.org.au/?Telnet
[4] http://melbournewireless.org.au/?SSH
[5] http://melbournewireless.org.au/?Linux
[6] http://www.tldp.org/HOWTO/Remote-Serial-Console-HOWTO/
[7] http://www.znark.com/tech/serialconsole.html
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