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POS Networks
Quatech Products Used: ESE-100M
eight port RS-232 Serial Device Server
Retail POS terminals at sales counters such as those in
grocery stores are comprised of multiple serial peripherals including
card readers, coupon printers, keypads, scales, cash drawers, bar code
scanners, and display screens, to name just a few. All these peripherals
require connection to a back-office server. An Ethernet connection is
an ideal choice as it permits an unlimited number of stations to be connected
over large distances via a single port on a server. Using RS-232, up to
8 devices can be connected via a single SDS. And, when using RS-422/485
serial ports, up to 10 (RS-422) or 32 (RS-485) individual devices can
be attached to each port. Meaning that a single Eight port RS-422/485
Serial Device Server can connect up to 256 individual POS peripherals--more
than enough for your average register bank. (Quatech will be releasing
RS-422/485 enabled serial device servers later this year.) And, not only
can all these devices be connected, they can be remotely monitored and
controlled from any other computer on the network (whether around the
corner or around the world) via a simple Internet or Intranet connection.

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