AT&T 2500 series User Manual

AT&T

CONTENTS

_

______________________________________________________________________________________

_

______________________________________________________________________________________

_

______________________________________________________________________________________

PREREQUISITE SKILLS AND KNOWLEDGE

DOCUMENT ORGANIZATION

HOW TO MAKE COMMENTS ABOUT THIS DOCUMENT

TRANSMISSION TYPES

ANALOG TRANSMISSION

DIGITAL TRANSMISSION

ANALOG VS. DIGITAL

TRANSMISSION STATES

VOICE TRANSMISSION

Entering the Switch

Exiting the Switch

DATA TRANSMISSION

Protocol Layers

Protocol States

Connectivity Rules

MULTIPLEXED COMMUNICATION

TYPES OF MULTIPLEXING

Frequency-Division Multiplexing

Time-Division Multiplexing

Statistical Multiplexing

MULTIPLEXING OVER DS1 FACILITIES

Signal Inversion

iii