ADTRAN IPR-S1000 manual Glossary

Configuring the IPR-S1000

GLOSSARY

Analog

Used to transmit audio such as voice, radio, stereo and control tones.

Antenna

A device for transmitting and receiving radio waves.

ATSC

The Advanced Television Systems Committee is an international, non-profit membership organization developing voluntary standards for the entire spectrum of advanced television systems. Specifically, ATSC is working to coordinate television standards among different communications media focusing on digital television, interactive systems, and broadband multimedia communications.

Band

A unit for designating a specific frequency of range of frequencies in the electromagnetic spectrum. Satellite communications most commonly use the C-Band (6/4 GHz) or Ku-Band (14/11 and 14/12 GHz) frequencies. Future satellite systems will make use of bands above 20 GHz to gain additional capacity and to avoid congestion andinterference with systems operating at lower frequencies.

Bandwidth

A means of capacity that indicates the amount of frequency spectrum required by a telecommunications service or system. Services requiring bandwidth greater than 200 KHz are known as "broadband". Those requiring less capacity are "narrowband". Also, the numerical difference in Hertz (Hz) between the highest and lowest in use.

Base-T

Standard of communication specific to Ethernet.

Baud

A unit of transmission speed equal to the number of times the state of a changes per second. Equal to the bit-per-second rate only if each signal element represents one bit of information. Baud rate usually refers to the number of bits transmitted each second. (Baud rate=Symbol rate).

Bidirectional

Able to send data in both directions.

Bridge

A device that connects two or more physical networks and forwards packets between them. Bridges can usually be made to filter packets, that is, to forward only certain traffic. Related devices are repeaters which simply forward electrical signals from one cable to another and full-fledged routers which make routing decisions based on several criteria.

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