ADTRAN 1204006L1 Manual do Utilizador descarregar pdf (Página 153)

61200.175L1-1 FSU 5622 ESP User Manual 137

Glossary

4-wire Switched 56

An AT&T proprietary 56/64 kbps switched digital data service offered by telco

service providers and delivered to users over 4 copper wires. Compatible with

the FSU 5622 ESP 4-wire Switched 56 DBU option.

American National Standards Institute (ANSI)

Devices and proposes recommendations for international communications

standards.

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.

backward explicit congestion notification (BECN)

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.

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).

bridge

A device that supports LAN-to-LAN communications. Bridges may be equipped

to provide frame relay support to the LAN devices they serve. A frame relay

capable bridge encapsulates LAN frames in frame relay frames and feeds them to

a frame relay switch for transmission across the network. A frame relay capable

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