IBM 3872 Manuals

Manuals and User Guides for IBM 3872. We have 1 IBM 3872 manual available for free PDF download: User Manual

IBM 3872 User Manual

IBM 3872 User Manual (76 pages)

Brand: IBM | Category: Modem | Size: 3.69 MB

Table of Contents

Table of Contents
7
IBM 3872 Modem
11
Function of a Modem
11
Highlights
11
Design Features
11
Special Features
12
Planning a Modem Installation
12
Introduction to Modems
15
Function of Data Terminal Equipment
15
Definition of Terms
15
Modem-Channel-Modem Subsystem
15
Modem Functions and Configurations
15
- Modem Internal Functions
  16
- Modem Configurations
  16
Modem-Channel Interface and Types of Facilities
17
Modem Operations
25
Modem Environment
35
Channel Characteristics
35
- Noise
  35
- Echo
  35
- Distortion and Delay
  35
- Equalizers
  35
- Bridges
  35
Modem-Data Terminal Equipment Interface
35
- Functional Description of DTE Interface Lines
  35
- 3872-DTE Interface
  37
Using Machine Considerations
37
- New Sync Line
  37
- Test Line
  40
- Data Set Ready Line
  40
- Data Signal Rate Selector Line
  40
- Select Standby Line
  40
- Propagation through the Modem
  40
- Spurious Bits
  40
- Clear-To-Send Delay
  41
- Data Carrier Detected and Echo Clamp Delays
  41
- Loss of Carrier Options
  41
Installation Planning
43
IBM 3872 Modem Specifications
43
- Operation
  46
- Equalization
  47
Special Feature Descriptions
47
Second Modem Feature
47
Point-To-Point Feature
47
Multipoint Tributary Feature
47
Switched Network Feature
47
Switched Network Backup Feature
51
Switched Network Backup with Automatic Answering Feature
51
Automatic Call Origination on Switched Network Feature
52
Direct Line Attachment Feature (World Trade Countries)
53
Alternate Voice Feature
53
Fan-Out Feature
53
Appendix A. World Trade Considerations
61
Channel Specifications
61
Direct Line Attachment
61
Switched Network Operation in the USA and Canada
61
Caducee Attachment Feature (France
61
- DTE Interface
  61
- Coffret Interface
  61
- Operation
  62
Appendix B. Glossary
63
Appendix C. Switched Network Backup with BTAM
65
Excessive Errors and Alternative Actions
65
Standby Configuration Planning
65
Standby Changeover and Operation
68
Point-To-Point Backup
68
- Answer (CBS Data Coupler) at Terminal
  70
- Both Ends
  70
Multipoint Backup
70
Index
71

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