Introduction - Enterasys RoamAbout RBT-1002 Installation Manual

Chapter 1

Introduction

The RoamAbout RBT-1002 Wireless Access Point is an IEEE
802.11a/g access point that provides transparent, wireless
high-speed data communications between a wired LAN and fixed,
portable or mobile devices equipped with an 802.11a, 802.11b or
802.11g wireless adapter.
This solution offers fast, reliable wireless connectivity with
considerable cost savings over wired LANs (which include
long-term maintenance overhead for cabling). Using 802.11a and
802.11g technology, this access point can easily replace a
10 Mbps Ethernet connection or seamlessly integrate into a 10/
100 Mbps Ethernet LAN.
Radio Characteristics – The IEEE 802.11a/g standard uses a
radio modulation technique known as Orthogonal Frequency
Division Multiplexing (OFDM), and a shared collision domain
(CSMA/CA). It operates at the 5 GHz Unlicensed National
Information Infrastructure (UNII) band for connections to 802.11a
clients, and at 2.4 GHz for connections to 802.11g clients.
IEEE 802.11g includes backward compatibility with the IEEE
802.11b standard. IEEE 802.11b also operates at 2.4 GHz, but
uses Direct Sequence Spread Spectrum (DSSS) and
Complementary Code Keying (CCK) modulation technology to
achieve a communication rate of up to 11 Mbps.
The access point supports a 54 Mbps half-duplex connection to
Ethernet networks for each active channel.
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