GAI-Tronics LE300-IP Page/Party Line Extender User Manual
Page 69
Pub. 42004-488C
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Term Definition
Buffer
A storage device. Commonly used to compensate for differences in data rates
or event timing when transmitting from one device to another. Also used to
remove jitter.
Clock
A term for the source(s) of timing signals used in synchronous transmission.
Configuration
The arrangement of hardware in the system and the setting of various attributes
and parameters used by the software to provide the desired features.
Destination
A destination determines where audio broadcasts.
Distributed
Amplifier
An amplifier that resides in a zone. It amplifies broadcasts for certain
loudspeakers (usually two or less) in the zone.
Dual PPI
Acronym for Dual Page/Party
®
Interface. A card in the ADVANCE control
cabinet that allows two Page/Party
®
zones to be connected to the system.
E1
A digital transmission link with a capacity of 2.048 Mbps used in Europe. Is
used to transmit 30 digital channels for voice or data plus one channel for
signaling, and one channel for framing and maintenance.
EOL
Acronym for End-of-Line. An intelligent device located at the end of a wiring
segment for the purpose of monitoring cable integrity.
Ethernet
A local area network (LAN) technology which has extended into the wide area
networks. Ethernet operates at many speeds, including data rates of 10 Mbps
(Ethernet), 100 Mbps (Fast Ethernet), 1,000 Mbps (Gigabit Ethernet), 10 Gbps,
40 Gbps, and 100 Gbps.
FSK
Acronym for Frequency Shift Keying.
Impedance
The combined effect of resistance, inductance, and capacitance on a transmitted
signal, Impedance varies at different frequencies.
Interface
A shared boundary, defined by common physical interconnection
characteristics, signal characteristics, and meanings of exchanged signals.
IP Address
Also known as an Internet address. A unique string of numbers that identifies a
computer or device on a TCP/IP network. The format of an IP address is a 32-
bit numeric address written a four numbers from ) to 255, separated by periods
(for example, 1.0.255.123)
Jitter
The deviation of a transmission signal in time or phase. It can introduce errors
and loss of synchronization in high speed synchronous communications.
LED
Acronym for Light Emitting Diode. Used as a visual indicator (lamp) on
equipment such as access panels and cards.
Loading
The addition of inductance to a line in order to minimize amplitude distortion.
Used commonly on public telephone lines to improve voice quality, it can make
the lines impassable to high speed data, and baseband modems.