Specifications

OmniAccess Reference: AOS-W System Reference
918 Part 031652-00 May 2005
transmits packets it receives to all the connected ports. A small wired hub may
only connect 4 computers; a large hub can connect 48 or more. Wireless hubs
can connect hundreds.
HZ*
The international unit for measuring frequency, equivalent to the older unit of
cycles per second. One megahertz (MHz) is one million hertz. One gigahertz
(GHz) is one billion hertz. The standard US electrical power frequency is 60 Hz,
the AM broadcast radio frequency band is 535—1605 kHz, the FM broadcast
radio frequency band is 88—108 MHz, and wireless 802.11b LANs operate at
2.4 GHz.
I/O*
The term used to describe any operation, program or device that transfers data
to or from a computer.
ICSA
International Computer Security Association.
IEEE*
Institute of Electrical and Electronics Engineers, New York, www.ieee.org. A
membership organization that includes engineers, scientists and students in
electronics and allied fields. It has more than 300,000 members and is involved
with setting standards for computers and communications.
IEEE802.11*
A set of specifications for LANs from The Institute of Electrical and Electronics
Engineers (IEEE). Most wired networks conform to 802.3, the specification for
CSMA/CD based Ethernet networks or 802.5, the specification for token ring
networks. 802.11 defines the standard for wireless LANs encompassing three
incompatible (non-interoperable) technologies: Frequency Hopping Spread
Spectrum (FHSS), Direct Sequence Spread Spectrum (DSSS) and Infrared.
WECA’s focus is on 802.11b, an 11 Mbps high-rate DSSS standard for
wireless networks.
IP*
A set of rules used to send and receive messages at the Internet address level.