ADTRAN ATLAS 810 Plus Specifications download pdf (Page 171)

Appendix E. Glossary

61200266L1-1 ATLAS 810

PLUS

User Manual E-5

Octal BRI/U Module

One of the ATLAS 810

PLUS

option modules. The Octal BRI/U Module provides eight basic rate ISDN

U interfaces, each capable of operating in NT or LT mode.

option modules

Any optional, hot-swappable module that can be added to the ATLAS 800 system for a variety of

applications. See also

overbooking

ATLAS 810

PLUS

feature that reduces telecommunications expenses by allowing you to over-subscribe

switched bandwidth for situations where simultaneous access to the network by every subscriber is

not required.

PBX

private branch exchange. A telephone system usually owned by the customer that serves a particular

location. It provides connections from one phone extension to another and connects to the external

telephone network.

PRI

Primary Rate ISDN. An ISDN service that provides 23 B (bearer) channels (64 kbps each) and 1 D

(data) channel (64 kpbs). The combined capacities are equivalent to one T1 channel.

Quad Nx56/64 Module

(Nx is pronounced "en-by.") One of the ATLAS 800 option modules. The Quad Nx56/64 Module pro-

vides four synchronous V.35 DTE ports, each of which can operate at any rate that is a multiple of 56 or

64 kbps, up to 1.536 Mbps.

Quad T1/PRI Module

One of the ATLAS 810

PLUS

option modules. The Quad T1/PRI Module provides four channelized T1

or Primary Rate ISDN (PRI) interfaces. Each interface can operate independently in DS-1 or DSX-1

mode, and any port can serve as the primary or backup timing source for the entire system.

Remote Access

The ability to connect to non-local communications equipment.

robbed bit signaling

A type of in-band signaling used with voice transmissions for multiplexing multiple voice circuits

onto a T1.

SNMP

Simple Network Management Protocol. A control and reporting scheme widely used to manage

devices from different vendors. SNMP operates on top of the Internet protocol.

synchronous

1.The condition occurring when two events happen in a specific time relationship with each other,

both under control of a master clock.

2 A method of data transmission requiring the transmission of timing pulses to keep the sender and

receiver synchronized in their communication used to send blocks of information. Synchronous data

transmission is used in high speed data circuits because there is less overhead than asynchronous

transmission of characters which contain two extra bits per character to affect timing.

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