DECcommEquipment_aug67.pdf

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DEC
COMMUNICA TIONS
EQUIPMENT
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DIGITAL EQUIPMENT CORPORATION
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MAYNARD, MASSACHUSETTS
DEC
COMMUNICATIONS
EQUIPMENT
DIGITAL EQUIPMENT CORPORATION. MAYNARD, MASSACHUSETTS
Copyright 1968 by Digital Equ ipment Corporation
CONTENTS
CHAPTER 1
INTRODUCTION
DEC's Communication System Design Approach
Data Communication System Design Factors
Low-Speed Serial Asynchronous Communications
Type of Terminal
Low-Speed Terminal Characteristics
Transmission Media
Parallel Devices
Medium -Speed Communication
Medium-Speed Terminal Characteristics
High-Speed Communications
High-Speed Terminal Characteristics
Summary of DEC Communication Equipment Characteristics
CHAPTER 2
APPLICATIONS OF DEC COMMUNICATION EQUIPMENT
PT08 Serial Line Interface
680 Data Communication System
OPOl A Synchronous Modem Interface
Asynchronous Data Communication Channel Type 636
DP02A/DP03 Automatic Dialing Equipment
Parallel Data Channels
Interprocessor Buffers
Parallel Devices
Communication System Examples
A irl i ne Reservation and Management System
Time-shared Computer Service
Multi-Terminal Data Processor
Centrally Monitored Process Control Sites
Special Communication System Requirements
1-1
1-1
1-2
1-3
1-3
1-4
1-5
1-5
1-5
1-6
1-6
1-7
2-1
2-3
2-7
2-8
2-9
2-10
2-10
2-11
2-11
2-12
2-13
2-14
2-15
2-15
iii
CONTENTS (Cont)
.Page
CHAPTER 3
DEC SERIAL DATA COMMUNICATION EQUIPMENT
PERFORMANCE AND INTERFACE CHARACTERISTICS
PT08 Asynchronous Serial Line Interface
Principles of Operation
Character Format
Speed
Programming
lOT Instructions
Maintaining Maximum Data Rates
Interfacing to Teletype Equipment
Input Data
Reader Run Signal
Output Data
Cabling
Interfacing to EIA Devices (PT08F Option)
Data Signal Polarity
Cabling
680 Data Communi cation System
Principles of Operation
Character Structure and Data Rates
Data Rate Versus Number of Lines
W750 Serial Line Unit
680 System Software and Programm
i
ng
5-Bit and 8-Bit Character Assembly Routines
Diagnostics
Interfacing to the 680
Direct Interfacing to 685 Serial Line Multiplexer
Type 682 Loca
I
Line Pane
I
Input Characteristics
Output Characteristics
Spec ial Features
Cabling
iv
3-1
3-1
3-1
3-1
3-2
3-2
3-3
3-4
3-4
3-4
3-4
3-4
3-4
3-6
3-6
3-7
3-7
3-8
3-9
3-9
3-10
3-11
3-11
3-12
3-12
3-14
3-14
3-15
3-15
3-15

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