User's Manual

Glossary
BreezeMAX Extreme 256 System Manual
CSMA/CD 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.
CSN Connectivity Service Network. A CSN is defined as a set of network functions that
provide IP connectivity services to WiMAX subscribers and all the IP core network
functions. A CSN is comprised of network elements such as routers, proxy/servers,
user databases, and inter-working gateway devices.
CTC Convolutional Turbo Code is a type of turbo codes with some of the convolutional
schemes used. For its high-performance error correction nature, CTC is the iterative
decoding scheme of choice as evidenced by their wide adoption in standards bodies.
DCD Downlink Channel Descriptor.
DHCP 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.
DL Down Link
DSCP 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.
DNS Domain Naming System. A system that stores information about hostnames and
domain names. DNS provides an IP address for each hostname, and lists the e-mail
exchange servers accepting e-mail addresses for each domain.
DSL Digital Subscriber Line. A technology that exploits unused frequencies on copper
telephone lines to transmit traffic typically at multi-megabit speeds. DSL can allow
voice and high-speed data to be sent simultaneously over the same line. Because
the service is 'always available,' end-users don't need to dial in or wait for call set-up.
EAP 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.
EDT Electrical Down-Tilt
EIRP Equivalent Isotropic Radiated Power. The apparent power transmitted towards the
receiver, if it is assumed that the signal is radiated equally in all directions. The EIRP
is equal to the power (in dBm) at the antenna port, plus the power gained from the
directivity of the antenna (in dBi).
EMC 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.