Dear Switched:
Easy answer first: I expect that your old switch box is not set up to
handle the bi-directional and enhanced printing requirements of newer
printers. Then, even if it works for the first printer you use when you
boot and print, the communication link is broken when you switch from one
printer to the other, and you may have to reboot your machine in order to
reestablish communications. That completely wipes out any convenience
offered by the switch box. Although such a problem is unlikely with a dot
matrix printer, it could be a factor with the ink jet printer.
Additionally, switch boxes are not a great idea for any but the least
expensive of printers. The electronic controller circuitry inside your
printer is the most expensive component to repair or replace and the most
susceptible to damage from things like power surges. If the switch box is
poorly designed or assembled, it is possible that when you turn the switch,
one or more wires may still be connected when contact is made in the new
position. That could result in unwanted voltage being sent up a wire,
possibly damaging one or both printers or your computer's port.
And if I have not yet convinced you not to use it, be aware that some
printer manufacturers have warranties that do not cover damage caused when
the printer is connected to a manual switching device. That is often the
case with laser printers, which may be a consideration for you if you have
plans to upgrade in the near future.
But I won't leave you without a solution. For about $20 you can get an
additional parallel port that supports the latest high-speed bi-directional
modes. You don't have to be concerned about communications with your
printer or possible damage when switching. All you need is an open,
available slot in your system. This solution has the added advantage of
making it possible to use both printers at the same time.
Claudia Slate
Dakota Technics
http://dakotatechnics.com
mailto:clslate@dakotatechnics.com
Dear Switched:
Not only do HP printers not like A/B switches, Hewlett Packard will tell you not to use them because of a chance that you could ruin your printer. Almost all modern printers use bi-directional signals to print and communicate with the PC. The older A/B switch boxes are not bi-directional compatible.
That may be the problem. The best way to do this is to install an
additional parallel port, or buy a parallel/USB converter.
Ann Clubb
Silent Partners Virtual Assistance Group
http://www.silentpartners-va.com/
mailto:lists@silentpartners-va.com
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