AT&T 7400 series User Manual

AT&T

iv

CONTENTS

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MULTIPLEXING OUTSIDE THE SWITCH

Multiplexing onto T1 Trunks

Compressing the Signal

Altering Channel Assignments on T1 Trunks

Getting the Signal Ready for the Central Office

Changing the Transmission Medium from Metallic to Fiber-Optic

Multiplexing with Microwave

STATISTICAL MULTIPLEXING

Local Exchange Trunks

Special-Access Trunks

Auxiliary Trunks

Miscellaneous Trunks

ADMINISTRATION OPTIONS

System 85/G2 Administration

System 75/G1 Administration

INTERFACE CIRCUIT

TYPES OF NETWORKS

NETWORK EVOLUTION

SOFTWARE CAPABILITIES

Basic Networking Software

Main-Satellite/Tributary Software — The UDP and Multipremises Packages

Electronic Tandem Network Software — The PNA and ETN (Standard Network) Packages

Distributed Communications System

NETWORK CALL PROCESSING