Aironet AP4500 Guide de l'utilisateur télécharger pdf (Page 16)

Welcome to the Aironet 4000 Series Wireless LAN Adapter

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Radio Characteristics

The Wireless LAN Adapter operates in the 2.4 GHz license-

free Industrial Scientiﬁc and Medical (ISM) band. Data is

transmitted over a half-duplex radio channel operating up to

2 Mbps (4500 Series) or 11 Mbps (4800 Series).

Direct Sequence Radio Technology

The Aironet 4000 Series Wireless LAN Adapter uses

Direct Sequence Spread Spectrum (DSSS) transmission

previously developed for military “anti-jamming” and “low

probability of intercept” radio systems. The signal is

transmitted over a wide frequency range, using multiple

frequencies. This protects the data transmission from inter-

ference.

Data Transparency and Protocols

The Aironet 4000 Series Wireless LAN Adapter transports

data packets transparently as they move through the

wireless infrastructure. The Wireless LAN Adapter operates

similarly to a standard network product except the wire is

replaced with a radio connection. No special wireless net-

working functions are required. All existing applications,

which operate over a network, will operate using the Aironet

4000 Series Wireless LAN Adapter.

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Aironet AP4500 Guide de l'utilisateur Page 16