Network Router User Manual

78
Coverage
The region within which a paging receiver can receive reliably the transmission of the paging
signals.
CoverageArea
The geographical reach of a mobile communications network or system.
CoverageHole
An area within the radio coverage footprint of a wireless system in which the RF signal level is
below the design threshold. Coverage holes are usually caused by physical obstructions such as
buildings, foliage, hills, tunnels, and indoor parking garages.
CyclicRedundancyCheck(CRC)
Acommontechniquefordetectingdatatransmissionerrors.
DynamicHostConfigurationProtocol(DHCP)
A protocol that automatically assigns temporary IP addresses to client stations logging onto an IP
network, so users do not have to configure the IP addresses manually. The EOA7530 contains an
internal DHCP server that automatically allocates IP address using a user-defined address range.
DeadSpot
An area within the coverage area of a WLAN in which there is no coverage or transmission falling
off. Dead spots are often caused by electronic interference or physical barriers such as hills,
tunnels, and indoor parking garages. See also coverage area.
802.11
A category of WLAN standards defined by the Institute of Electrical and Electronics Engineers
(IEEE).
802.11a
An IEEE standard for WLANs that operate at 5 GHz, with rates up to 54 Mbps.
802.11b
An IEEE standard for WLANs that operate at 2.4 GHz, with rates up to 11 Mbps.
802.11g
AnIEEEstandardforWLANsthatoperatesat2.4GHzwithratesupto54Mbps.
Encryption
The translation of data into a secret code. Encryption is the most effective way to achieve data
security. To read an encrypted file, you must have access to a secret key or password that enables
you to decrypt it. Unencrypted data is called plain text ; encrypted data is referred to as cipher text
ESSID
AnESSIDistheuniqueidentifierforanESS.AllAccessPointsandtheirassociated wireless
stationsinthesamegroupmusthavethesameESSID.
Footprint
Geographicalareasinwhichanentityislicensedtobroadcastitssignal.
Gatewa y
Acomputersystemorotherdevicethatactsasatranslatorbetweentwosystemsthatdonotuse
thesamecommunicationprotocols,dataformattingstructures,languagesand/orarchitecture.