User's Manual

Glossary
4Motion 911 System Manual
10Base-T An Ethernet cabling standard where data is transmitted in baseband spectrum of a
twisted pair cable (i.e. Cat 3 or better, Cat 5 in most networks) with data rate of 10
Mbps. (10 for 10Mbps, Base for baseband, T for twisted pair). 10Base-T
implementation uses star topology.
100Base-T An Ethernet cabling standard where data is transmitted in baseband spectrum of a
twisted pair cable (i.e. Cat 5 or better), with data rate of 100 Mbps. 100Base-T
implementation uses star topology. 100Base-T is also known as Fast Ethernet.
1000Base-T An Ethernet cabling standard where data is transmitted in baseband spectrum of a
twisted pair cable (Cat 5E or better), with data rate of 1000 Mbps. 1000Base-T
implementation uses star topology. 1000Base-T is also known as Gigabit Ethernet.
3G Third generation wireless service, designed to provide high data speeds, always-on
data access, and greater voice capacity..
AAA Authentication, Authorization, and Accounting (pronounced "triple a."). A system (or
several systems) that controls what resources users have access to, and keeps
track of the activity of users over the network.
AAS Adaptive Antenna System, also called Advanced Antenna System, is a technology to
enable the network operators to increase the wireless network capacity. In addition,
adaptive antenna systems offer the potential of increased spectrum efficiency,
extended range of coverage and higher rate of frequency reuse. Adaptive antenna
systems consist of multiple antenna elements at the transmitting and/or receiving
side of the communication link, whose signals are processed adaptively in order to
exploit the spatial dimension of the mobile radio channel. Depending on whether the
processing is performed at the transmitter, receiver, or both ends of the
communication link, the adaptive antenna technique is defined as multiple-input
single-output (MISO), single-input multiple-output (SIMO), or multiple-input
multiple-output (MIMO).
ACL Access Control List. A filtering mechanism used by many access IP routers that
controls which traffic may be received or transmitted on an interface or port.
AISG Antenna Interface Standards Group. The objective of the group is to facilitate the
introduction of base station antennas with remotely adjustable tilt by agreeing open
standards for the associated data transmission system.
ANSI American National Standards Institute. A voluntary organization composed of
corporate, government, and other members that coordinates standards-related
activities, approves U.S. national standards, and develops positions for the United
States in international standards organizations.
ARP Address Resolution Protocol. Internet protocol used to map an IP address to a MAC
address. Defined in RFC 826.
ARQ Automatic Repeat reQuest. A communication technique in which the receiving
device detects errors and requests retransmissions.
ASCII American Standard Code for Information Interchange. A code for representing
English characters as numbers, with each letter assigned a number from 0 to 127.