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Ohio Bell's SxS Training Course and Reference Manual (1952)

Scanned and Processed by Tim Griffin
Contributed by Len Hicken

"This treatise of the Step-by-Step type Dial System is intended primarily to acquaint the new Traffic men with the fundamental principles of this type dial telephone equipment and its operation, thereby enhancing him with a knowledge of the words and terms peculiar to it, the part played by each individual equipment unit utilized in the completion of a dialed call, intra and inter- office trunking arrangements, and, above all, to instill in him sufficient knowledge of the dial equipment to enable him to perform a more complete and successful traffic job."

Table of Contents
1.0 GENERAL
2.0 AUTOMATIC DIAL TELEPHONE EQUIPMENT

3.0 TYPES OF OFFICES

4.0 FUNDAMENTALS
4.01 Elementary Electricity
4.02 Elements of Magnetism
4.03 Circuits
4.04 Telephone Parts

5.0 DEFINITIONOF TERMS AND EXPLANATION OF EQUIPMENT
5.01 Telephone
5.02 Dial
5.03 DistributingFrames
5.04 Primary Line Switches and Master Switches
5.05 Secondary Line Switches and Master Switches
5.06 Step-by-StepSwitch
5.07 Line Finder Frames and Line Finders
5.08 Selectors - Local
5.09 Selectors - Toll
5.10 Connectors
5.11 Trunks Preceding First Selectors
5.12 Coin Box Trunk - Postpay
5.13 Traffic Registers
5.14 Plunger Out Trunk Switches
5.15 Rotary Out Trunk Switches
5.16 Reverting Call Switch
5.17 Verification Test Distributor
5.18 Intercepting Equipment
5.19 Repeaters (Interoffice Trunk Type)
5.20 Rotary Extension Switches (Toll Application)
5.21 Connector Access to Toll Stations
5.22 Power Equipment
5.23 Equipment Alarms
5.24 Mechanical Adjustments SXS Dial Equipment
5.25 Miscellaneous Central Office Apparatus

6.0 PROGRESS OF A CALL

7.0 EQUIPMENT SPECIFICATIONS AND DRAWINGS
7.01 Introduction
7.02 Standard Specifications and Drawings
7.03 Job Specifications and Drawings
7.04 Abbreviations
7.05 Glossary of Terms used on Drawings

8.0 TRUNKING
8.01 General Description
8.02 Line Switch Trunking
8.03 Line Finder Trunking
8.04 Selector Switch Trunking
8.05 Selector Frame Terminal Assemblies
8.06 Assignment of First Selector Bank Levels
8.07 Special Trunk Groups
8.08 Uses of the Various Switches
8.09 Toll Equipment
8.10 Testing Trunks
8.11 Straight and Graded Multiple Arrangements
8.12 Selector Frames Without Distributing Type Terminal Assemblies
8.13 Arrangement of Cross-Connections for Graded Multiple Trunk Groups to Other Equipment
8.14 Capacity Tables
8.15 Interoffice Trunks

9.0 INTERTOLL DIALING
9.01 General
9.02 Two-Way lntertoll Trunk Groups
9.03 One-Way Intertoll Trunk Groups
9.04 Thru Dialing
9.05 lntertoll Selector Equipment
9.06 Trunk Equipment
9.07 Switchboard Equipment
9.08 Location of Equipment
9.09 Nationwide Operator Toll Dialing

10.0 TRAFFIC ENGINEERING
10.01 General
10.02 The Traffic Engineer's Job
10.03 Relation Between Loads, Service and the Traffic Engineer
10.04 Influence of Exchange Rate Structure on Facilities
10.05 Numbering Arrangements
10.06 Traffic Space Requirements
10.07 Separation Studies
10.08 Engineering Data and Estimates
10.09 Step-By-Step Traffic Engineering

11.0 DIAL OFFICE MANAGEMENT
11.01 District Man's Responsibilities
11.02 Dial Tone Speed Tests
11.03 Busy Line Studies
11.04 Personal Observations
11.05 Assistance Tickets
11.06 Plant Contacts
11.07 Special Analysis and Tests
11.08 Conclusion
11.09 Reference Material List

12.0 NOMENCLATURE