Specifications

Glossary
Glossary-6
RADIUS
RADIUS (Remote Authentication Dial-In User Service). RADIUS is an IETF standard
protocol for Authentication, Authorization and Accounting.
range extender antenna
An indoor antenna that extends the coverage area of a RoamAbout wireless device.
Rapid Rekeying
Also known as Key Tumbling, provides frequent, automatic, redistribution of IEEE 802.11
WEP Encryption keys for enhanced security.
RoamAbout AP Manager
Software used to manage and configure one or more APs. The software is installed on a
Windows computer that connects to the AP via a wired LAN or wireless LAN.
roaming
The ability for a wireless client to move from one cell to another in a wireless network
without losing the network connection.
As the client moves between different wireless cells, the RoamAbout PC Card keeps track of
the quality of the radio connection with the APs. As the client moves away from its AP and
the signal level decreases, the RoamAbout PC Card automatically connects to another AP in
the same network that has a stronger signal level.
RTC/CTS
Request To Send/Clear To Send protocol. Used when radio transmission collisions occur.
The protocol specifies a threshold where a device sending a packet larger than the threshold
must send an RTS message and wait for the receiving device to send a CTS message before
sending the packet.
semi-open environment
A work space divided by shoulder-height, hollow wall elements.
SNR
Signal to Noise Ratio. A dynamic indicator that indicates the relative strength of the radio
signal (signal level) versus the radio interference (noise level) in the radio signal path.