Specifications

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Communication Overview
11
COM
communication peripherals and the host computer, as well as
the data transfer speed required for your application to function
properly. The number of peripherals you need to connect to the
host computer is also important for determining how many ports
must be added via expansion boards or hubs. The above flowchart
provides an overview of this decision-making process. The sections
that follow provide detailed explanations of the options available
at each step in the process.
USB
PCMCIA
or
CardBus
Parallel
Serial
USB Serial
Adapter
USB Peripherals, e.g. printer, scanner
RS-232
RS-422
RS-485
Standard
or
EPP
Async.
or
Sync.
Number
of
Ports
RS-232
RS-422
RS-485
Portable
Application
IEEE 1394
IEEE 1394 peripherals, e.g. video and still cameras
USB
PCI or
CompactPCI
Parallel
Serial
USB Serial
Adapter
USB Peripherals, e.g. printer, scanner
RS-232
RS-422
RS-485
Standard
or
EPP
Async.
or
Sync.
Number
of
Ports
RS-232
RS-422
RS-485
Desktop
Application
IEEE 1394
IEEE 1394 peripherals, e.g. video and still cameras
Data
Communication
Peripherals
Printer
Scanner
Plotter
Zip Drive
Tape Drive
CD Drive
Bar Code
Reader
Touch Screen
Mouse
Digital Camera
Modem
Etc.
Wired
System
RF
Modem
802.11b
Bluetooth
Bluetooth peripherals, e.g. PDA, mobile phone, printer, modem, etc.
802.11 wireless LAN networks and corresponding peripherals, e.g. printers, modems
Data transfer between compatible sources, e.g. PC-PC or PC-PLC
Wireless
System
ISA
COM
(Assembling a Data Communication System)