ADTRAN 1204006L1 Manual do Utilizador descarregar pdf (Página 186)

Appendix D. Glossary

D-8 TSU IQ+ User Manual 61200275L1-1

framing

A control procedure used with multiplexed digital channels (such as T1carriers)

where bits are inserted so the receiver can identify time slots allocated to each

subchannel. Framing bits may also carry alarm signals indicating specific alarm

conditions, cyclic redundancy checks (CRCs), and an out-of-band data channel

in the case of an extended superframe (ESF) T1 link. In T1 terminology, a frame

consistsof192databitsandoneframingbit.

gateway

A device which enables information to be exchanged between two dissimilar

systems or networks.

HDLC

high level data link control. A generic link-level communications protocol

developed by the International Organization for Standardization (ISO). HDLC

manages synchronous code-transparent, serial information transfer over a link

connection. See also SDLC.

host computer

The primary or controlling computer in a multiple computer operation.

in-band

Signaling (dialing, diagnostics, management, configuration, etc.) over the same

channel used for data.

ingress

Frame relay frames leaving from an access device in a direction toward the

frame relay network.

interface device

Provides the interface between the end device(s) and a frame relay network by

encapsulating the user's native protocol in frame relay frames and sending the

frames across the frame relay backbone. See also encapsulation and frame-relay-

capable interface device.

internet protocol. A protocol which provides for transmitting blocks of data

between hosts identified by fixed-length addresses.

1 2 ... 181 182 183 184 185 186 187 188 189 190 191 ... 197 198

Sem comentários

ADTRAN 1204006L1 Manual do Utilizador Página 186