Adtran 1200214L1 Manual do Utilizador descarregar pdf (Página 145)

61200214L1-1 IQ Probe User Manual 121

Glossary

ANSI

American National Standards Institute. Devices and proposes recommendations

for international communications standards.

ASCII

American National Standard Code for Information Interchange. The standard

and predominant 7-bit (8-bit with parity) character code used for data

communications and data processing.

asynchronous

A method of data transmission which allows characters to be sent at irregular

intervals by preceding each character with a start bit, followed by a stop bit.

attenuation

The loss of signal amplitude during transmission. The received signal is lower in

signal amplitude than the transmitted signal due to losses in the transmission

medium (resistance in the cable). Attenuation is measured in decibels.

bandwidth

The bandwidth determines the rate at which information can be sent through a

channel (the greater the bandwidth, the more information that can be sent in a

given amount of time).

BECN

backward explicit congestion notification. A bit set by a frame relay network to

notify an interface device (DTE) that congestion avoidance procedures should be

initiated by the sending device.

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