Multitech MT56DSU-R Owner's Manual download pdf (Page 60)

MT56DSU-R Owner's Manual

Elastic store - an option that causes the DSU to allow for timing

phase drifts in non-DDS applications.

Four-wire circuit - two twisted-pair circuits with each pair

transmitting signals in the opposite direction.

Jumper - a wire that connects two or more pins; a configurable

component on a printed circuit board.

LBO (Line Build Out) - process of inserting a loss in a short

transmission line to make it act like a longer line.

Leased line - a permanent communication line between a computer

and a terminal providing private, continuous access to the

connection by a subscriber for a fixed fee.

LED (Light Emitting Diode) - a light source that emits visible light.

Local loopback - a type of diagnostic test where the transmitted

signal is returned to the sending device after passing through a local

communications loop; the returned signal is then compared to the

transmitted signal.

Master station - see control station.

MJU (Multipoint Junction Unit) - a digital data bridge, located at

telco office, for the DDS network. Used to combine remote stations

bit streams into one serial bit stream for transmission to the control

station.

Multi-drop - see multipoint.

Multipoint - a single line or circuit that connects several stations

supporting terminals located in different areas. Usually requires

some type of pooling method. Contrast point-to-point.

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Multitech MT56DSU-R Owner's Manual Page 60