Sau - Alvarion BreezeMAX PRO 5000 CPE Product Manual

Glossary
PPPoE
QAM
QPSK
RADIUS
RF
RSSI
R&TTE
Rx

SAU

SDARS
SIP
BreezeMAX PRO 5000 CPE
Point-to-Point Protocol over Ethernet. PPPoE relies on two widely accepted standards:
PPP and Ethernet. PPPoE is a specification for connecting the users on an Ethernet to
the Internet through a common broadband medium, such as a single DSL line, wireless
device or cable modem. All the users over the Ethernet share a common connection,
so the Ethernet principles supporting multiple users in a LAN combines with the
principles of PPP, which apply to serial connections.
Quadrature Amplitude Modulation. A technique used in wireless applications to double
the available bandwidth by combining two amplitude-modulated signals. The two
combined signals differ in phase by 90 degrees; this technique doubles the bandwidth
by combining the two signals at the source before transmission, transmitting digital data
at a rate of 4 bits per signal change.
Quadrature Phase Shift Keying. A data transfer technique used in coaxial cable
networks that sends data using modulating signals. Four different phases represent
data, with each signal's information determined by the signal before it. For example, if a
phase stays the same from one signal to the other, the information has not changed.
Remote Authentication Dial-In User Service, an authentication and accounting system
used by many Internet Service Providers (ISPs). When you connect to the system you
must enter your username and password. This information is passed to a RADIUS
server, which checks that the information is correct, and then authorizes access to the
system.
Radio frequency. An AC signal of high enough frequency to be used for wireless
communications.
Received Signal Strength Indicator. A signal or circuit that indicates the strength of the
incoming (received) signal in a receiver.
Radio & Telecommunications Terminal Equipment. The R&TTE Directive 1999/5/EC
governs the marketing and use of R&TTE equipment. With the exception of a few
categories of equipment, the Directive covers all equipment, which uses the radio
frequency spectrum. It also covers all terminal equipment attached to public
telecommunication networks.
Receive
SU Alignment Unit
Satellite Digital Audio Radio Service. A satellite-based direct-broadcast radio service in
which digitally encoded audio entertainment material is broadcast to earth-based
receivers from an orbiting satellite, either directly or via a repeater station.
Session Initiation Protocol. An application-layer control IETF protocol that can
establish, modify, and terminate multimedia sessions such as Internet telephony calls
(VoIP). SIP can also invite participants to already existing sessions, such as multicast
conferences. Media can be added to (and removed from) an existing session. SIP
transparently supports name mapping and redirection services, which supports
personal mobility - users can maintain a single externally visible identifier regardless of
their network location.
97 Product Manual