Alvarion BreezeMAX PRO 5000 CPE Product Manual page 111

Glossary
CRC
CS
CSMA/CD
CW
CWMP
DHCP
DL
DSCP
EAP
EAP-TTLS
EMC
ETSI
FCC
FEC
BreezeMAX PRO 5000 CPE
Cyclical Redundancy Check. A common technique for detecting data transmission
errors, in which the frame recipient calculates a remainder by dividing frame contents
by a prime binary divisor and compares the calculated remainder to a value stored in
the frame by the sending equipment.
Convergence Sublayer. Particular protocols that are responsible for gathering and
formatting higher layer information so it can be processed by the lower layers.
Carrier Sense Multiple Access with Collision Detection. Media-access mechanisms
wherein devices ready to transmit data first check the channel for a carrier. If no carrier
is sensed for a specific period of time, a device can transmit. If two devices transmit at
once, a collision occurs and is detected by all colliding devices. This collision
subsequently delays retransmissions from those devices for some random length of
time. Ethernet and IEEE 802.3 use CSMA/CD access.
Continuous Wave. An unmodulated RF signal.
CPE WAN Management Protocol. See also TR-069.
Dynamic Host Configuration Protocol. A protocol for dynamically assigning IP
addresses from a pre-defined list to nodes on a network. Using DHCP to manage IP
addresses simplifies client configuration and efficiently utilizes IP addresses.
Down Link
Differentiated Service Code Point, AKA DiffServ: An alternate use for the ToS byte in IP
packets. Six bits of this byte are being reallocated for use as the DSCP field where
each DSCP specifies a particular per-hop behavior that is applied to the packet.
Extensible Authentication Protocol, A protocol used between a user station and an
authenticator or authentication server. It acts as a transport for authentication methods
or types. It, in turn may be encapsulated in other protocols, such as 802.1x and
RADIUS. EAP is defined by RFC 2284.
Extensible Authentication Protocol-Tunneled Transport Layer Service. A type of mutual
authentication protocol where just the server sends a digital certificate to identify itself
to the clients.
Electro-Magnetic Compatibility. The capability of equipment or systems to be used in
their intended environment within designed efficiency levels without causing or
receiving degradation due to unintentional EMI (Electro Magnetic Interference). EMC
generally encompasses all of the electromagnetic disciplines.
European Telecommunications Standards Institute. A non-profit organization producing
voluntary telecommunications standards used throughout Europe, some of which have
been adopted by the EC as the technical base for Directives or Regulations.
Federal Communications Commission. A U.S. government agency that supervises,
licenses, and controls electronic and electromagnetic transmission standards.
Forward Error Correction. A method of communicating data that can correct errors in
transmission on the receiving end. Prior to transmission, the data is put through a
predetermined algorithm that adds extra bits specifically for error correction to any
character or code block. If the transmission is received in error, the correction bits are
used to check and repair the data.
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