Contents

INTRODUCTION ……………………………………………………………………………………… 1-1

Purpose ………………………………………………………………………………………………… 1-1

Organization …………………………………………………………………………………………… 1-3

GENERAL INFORMATION ………………………………………………………………………… 2-1

Voice Terminals ……………………………………………………………………………………… 2-1

Facilities Common to All Voice Terminals…………………………………………………………… 2-4

Adjuncts ………………………………………………………………………………………………… 2-11

EXPOSED PORT PROTECTION ………………………………………………………………… 2-21

Requirements ………………………………………………………………………………………… 2-21

AVAILABILITY ………………………………………………………………………………………… 2-25

ADJUNCT POWER …………………………………………………………………………………… 2-31

Information on the Older Power Supplies …………………………………………………………… 2-33

The MSP-1 Power Supply …………………………………………………………………………… 2-35

ADMINISTRATION …………………………………………………………………………………… 2-39

Aliasing ………………………………………………………………………………………………… 2-39

Button and Feature Caveats ………………………………………………………………………… 2-49

VOICE TERMINAL FEATURES ………………………………………………………………… 3-1

7101A Voice Terminal ……………………………………………………………………………… 3-17

Applications …………………………………………………………………………………………… 3-17

Physical Description …………………………………………………………………………………… 3-17

Distance Limitations …………………………………………………………………………………… 3-19

Power Requirements ………………………………………………………………………………… 3-19

Power Failure Operation ……………………………………………………………………………… 3-19

FCC Registration ……………………………………………………………………………………… 3-19

Hearing Aid Compatible ……………………………………………………………………………… 3-20

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AT&T System 85 manual Contents