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126 IQ Probe User Manual 61200214L1-1

Glossary

frame-relay-capable interface device

A communications device that performs encapsulation. Frame-relay-capable

routers and bridges are examples of interface devices used to interface the

customer's equipment to frame relay network. See also interface device and

encapsulation.

frame relay frame

A variable-length unit of data, in frame-relay format that is transmitted through a

frame relay network as pure data. Contrast with packet.

frame relay network

A telecommunications network based on frame relay technology. Data is

multiplexed. Contrast with packet switching network.

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.

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Adtran 1200214L1 Manual de usuario Pagina 150