Sam's Telecomms Documents Repository
Sam's Telecomms Documents Repository
Post Office InformationPlease see the note about Crown Copyright on the index page.
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3000 Type Relay Data Post Office data sheets on the 3000 Type relays. Introduction (80 kB) 1970 Data Sheets (3896 kB) BR copy 1980 Data Sheets (3091 kB) Courtesy of Paul Ebling | |
| ATW 22001 Symbols for Circuit Diagrams etc | ATW 22001 Symbols Rules & Conventions: The Post Office standard for schematic drawings. Includes circuit symbols, component layout (eg tag numbering) and component designations for various functions. It incorporates the symbols from British Standard BS 530 (1948) which later became BS 3939 (1966) and then BS EN 60617. Courtesy of John Mulrane [2.8 MB] |
| Cable Pressurisation | Post Office Notes for Internal Students, "A short appreciation of the need for the awareness by all staff, both internal and external, of cable maintenance methods and aims." [159 kB] |
| Dial Adjustment & Maintenance MAI No 25 MAI No 26 |
Dial adjustment and maintenance instructions for Trigger type (No 25) and Slipping Cam type (No 26) [816 kB and 1.2 MB] |
| Description and Adjustment of Dial Mechanisms | Technical Instruction from 1928 Part 24A. Description and adjustment for Dials, Auto No 10 also Nos 1, 3, 6 and 8. Courtesy of Laurence Rudolph [3.8 MB] |
| Educational Pamphlets Draft Series General 3/8 Telegraph 4/1 Telephones 1/1 Telephones 2/2 Telephones 3/1 Telephones 3/4 Telephones 3/11 Telephones 3/19 Telephones 4/1 Telephones 4/3 Telephones 5/2 Telephones 6/1 Telephones 6/3 Telephones 6/4 Lines 3/4 |
Post Office educational pamphlets. An excellent introduction to telephony topics. Draft Series issued in typescript. General Draft Series 3/8: Main and Intermediate Distribtion Frames [2.6 MB] Telegraph Draft Series 4/1: The Teleprinter No 7 [1.7 MB] Telephones Draft Series 1/1: Local and Central Battery Telephones [2.2 MB] Telephones Draft Series 2/2: Magneto & C.B.S. Working [581 kB] Telephones Draft Series 3/1: Automatic Step System [442 kB] Telephones Draft Series 3/4: Ordinary Final Selectors [1.4 MB] Telephones Draft Series 3/11: Director Multi-Exchange Areas [559 kB] Telephones Draft Series 3/19: Testing and guarding circuits [1.5 MB] Telephones Draft Series 4/1: Uniselector Mechanisms [1.8 MB] Telephones Draft Series 4/3: 2000 type two-Motion Selector Mechanism [2.4 MB] Telephones Draft Series 5/2: Loop-Disconnect Pulsing - Elementary Treatment [294 kB] Telephones Draft Series 6/1: An Outline of the Public Telephone System [2.7 MB] Telephones Draft Series 6/3: Telephone Traffic [683 kB] Telephones Draft Series 6/4: Trunking and Grading [1.4 MB] Lines Draft Series 3/4: Protective Devices used in telephone and telegraph lines (eg fuse, heat coils etc) [1.2 MB] |
| Educational Pamphlets Final Series General 2/1 Technical Electricity 1/1 Telephones 1/1 Telephones 2/3 Telephones 2/4 Telephones 3/1 |
Post Office educational pamphlets. Final series, fully typeset. General 2/1: Standard Graphical Symbols [1.6 MB] Technical Electricity 1/1: The Telephone Relay [1.2 MB] Telephones 1/1: The Trunk Demand Service [342 kB] Telephones 2/3: Automatic Telephone Circuit Elements [1.5 MB] Telephones 2/4: The Automatic Telephone Dial [387 kB] Telephones 3/1: Automatic telephone- Non-Director Multi-Exchange Areas [515 kB] |
| Extension Arrangements | Sales Brochure DLA 100. Extensin Arrangements, Plans 1, 1A and 4 [511fkB] |
| Engineering Instructions T1012 Tester AT5422 |
Very few EIs remain in my collection, but I found this one by chance. It describes the Test Set usually installed at PABXs and small exchanges. [250kB] |
| Guide Notes (Customer Apparatus) Ambassador Telephones Hawk Cordless Telephone Merlin Tonto Premiere Call Connect Sceptre 100 Senator 1 Call Connect Special Range Telephones |
Essential information for the installer and maintainer of subscribers' apparatus. Ambassador Telephones [1.3 MB] The Hawk Cordless Telephone [540 kB] Merlin Tonto Personal Information Centre [2.4 MB] Premiere Call Connect System (PMBX 12) [2.6 MB] Sceptre 100 telephone [646 kB] Senator 1 Call Connect System [1.5 MB] Special Range Telephones [496 kB] |
| House Exchange System - Q-Diagrams | In addition to public exchange systems the British Post Office also supplied intercom systems under the title House Exchange System. It was documented in a series of Q-diagrams. A numerical listing of the Diagrams can be found here |
| Key & Lamp Unit SA/SAW 9154 SA 9156 SA/SAW 9157 SA/SAW 9228 |
SA 9154 - Key and Lamp Units Nos 2A and 10A 108 kB SA 9156 Order Table Working with K&L Unit No 2A or 10A, and UAA SA9151 Up to 20 Exchange lines or PBX Extensions - 5 sheets.[760 kB] SA 9157 Order Table Working with K&L Unit no 2A, Special Applications. This means various types of private wire - 9 sheets.[791 kB] SA 9228 Jack Unit No 1B [74 kB] |
| London Code Change | Two small reminders of the London code change on 6 May 1990: '071 or 081. Know London's Codes' and 'Remember the London code change on 6 May' [2.12 MB] |
| Loudspeaking Telephone No 4 | User Instruction Card |
| New Telephone Wiring System | Guide to the design and installation of the plug and socket wiring system introduced following liberalisation of the telephone instrument market. Courtesy of John Hein. [579 kB] |
| Precautions against Accidents | Document Rg 41. Sound safety advice to outside plant staff from 1956. Covers working with poles, ladders, power plant, and other dangers. [2.2 MB] |
| PABX 1 & 2 Drawings SAW 8102 Notes only PABX 3 Drawings SAW 81071 SAW 81510 SAW 81520 & Notes SA 8153-1 & Notes SAW 81532 SAW 81581 & Notes SAW 81582 SAW 81600 SAW 81622 SAW 81631 |
The circuit drawings for various parts of a PABXs. SA is a schematic, SAW is a routed schematic with wiring instructions. Diagram Notes Courtesy of John Griffiths. SAW 8102 Notes for Connecting Circuit: Selector & Line Finder for PABX 1 & 2 [557 kB] PABX 3 Drawings & Notes SAW 81071 Ringing & pulse Circuit for PABX Nos 1, 2 & 3 [229 kB] SAW 81510 Extension Line & Finder (ATE Dwg No TG1713 based on AT8151) [190kB] SAW 81520 1st Group Selector Diagram [118kB] Notes [35 kB] SA 8153-1 Final Selector, earlier version Diagram [92kB] Notes [36 kB] SAW 81532 Final Selector, later version [103kB] SAW 81581 Exchange Line Circuit, earlier version Diagram [225kB] Notes [49 kB] SAW 81582 Exchange Line Circuit, later version with pencil alterations for Railway use [194kB] SAW 81600 2nd Group Incoming & Enquiry Selector [116kB] SAW 81622 Inter-Switchboard line circuit both-way Manual-manual [194kB] SAW 81631 Inter-Switchboard line circuit both-way dialling in from PMBX [168kB] |
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Post Office Electrical Engineers' Journal Index for 1936 to 1946 Index for 1976-77 |
Indices to volumes of the Institute of Post Office Electrical Engineers Journal, usually abbreviated to POEEJ. Searchable PDFs, courtesy of Paul Ebling and Jack Ryan. Index to Volumes 29 to 38 from 1936/7 to 1945/6. 101 kB Index to Volumes 69 from April 1976 to Jan 1977. 726 kB |
| STD Code Book 1984 STD codes text alpha sort STD codes text numerical sort Corrections STD Code Book Reading 1965 STD Code Book Tunbridge Wells 1976 STD Code Book Haddenham 1984 STD Code Book Ryde, IOW 1979 STD Code Book Isle of Wight, 1983 STD Codes Reverse List 1968 |
A complete STD code book for 1984 converted to text from Haddenham & Long Crendon Issue 4. 22 pages [107 kB] Two plain text files containing the raw data in tab-delimited form and sorted alphabetically and numerically. [99 kB each] and an update file containing corrections made since the first issue of 16 Jun 2010. For comparison, image scans of the Reading STD Code Book for 1965 - uses the original letter codes. Courtesy of Rob Grant. 12 pages [798 kB] and then the Tunbridge Wells Book for 1976, Courtesy of Remco Enthoven, 48 pages [3.0 MB] and an image scan of the book used to create the text versions above. [2.5 MB] STD Code books for Ryde 1979 and 1983 (renamed Isle of Wight), courtesy of Mike Ginger [2.4 MB & 2.7MB] The reverse list is an internal document from 1968 and shows proposed charge groups as well as actual ones. Where only manual routing was possible there is no code against an exchange name. [3 MB] |
| System X - The Way Ahead | A lavishly illustrated booklet issued to introduce staff to the concept and practices of the new electronic exchange System X. 80 pages with many colour photographs making it a LARGE FILE 11.1 MB |
| Technical Pamphlets for Workmen Group A General A1 Magnetism and Electricity A2 Primary Batteries A3 Technical Terms A4 Test Boards A5 Protective Fittings A6 Measuring & Testing Insts A7 Sensitivity of Apparatus A8 Standard List of Terms A9 Standard Graphical Symbols |
A series of very informative booklets for Post Office staff. First published in 1919 and revised and reprinted up until the mid 1930s. Most are courtesy of Andy Banthorpe. Others from Mike Tyrrell and Hywel Clatworthy A1 Magnetism and Electricity looks at the fundamental principles behind the telegraph and telephone. 1934 edition [1.4 MB] A2 Primary Batteries explains the principle behind the Leclanché cell and it's derivative, the dry cell. Advice on maintenance and testing follows. 1936 edition [1 MB] A3 Technical Terms is a glossary of the terms used in both telegraphy and telephony. 1929 edition. [1.5 MB] A4 Test Boards is about the test facilities provided at exchanges for testing the incoming circuits. 1919 edition with 1928 updates. [1 MB] A5 Protective Fittings covers lightnig protectors, heat coils, fuses and their mountings. 1935 edition. [1 MB] A6 Measuring & Testing Instruments 1934 edition. [2.3 MB] A7 Sensitivity of Apparatus defines the current characteristics of various types of telegraph instrument followed by a section about the variosu types of relay unsed in telephony. 1926 edition with corrections to 1932. [1.8 MB] A8 Standard List of Terms and Definitions used in Telegraphy and Telephony. A compendious document of 54 pages divided into subject sections followed by and alphabetic index. 1934 edition. [1.8 MB] A9 Standard Graphical Symbols Describes itself as a reprint of BS 530-1934, which must have been the forerunner of BS 3939, and the subsequent BS EN 60617. 1934 edition. [825 kB] |
| Group B Telegraphy B1 Elementary Principles B2 Telegraph Concentrators B3 Morse Keyboard Perforators B4 Quadruplex and Repeaters B5 The Hughes Printing Telegraph B6 The Baudot Multiplex System B7 W. Electric Multiplex System |
The Telegraphy group are mostly self-explanatory. There are brief descriptions for each in the repository's Telegraphy section. [B1 346 kB, B2 1.3 MB, B3 1.8 MB, B4 334 kB, B5 395 kB, B6 349 kB, B6 556 kB] |
| Group C Wireless C1 Wireless TX & RX C2 Interference with Reception |
The Wireless group reminds us that the Post Office was responsible for tracing interference to radio broadcasts. C2 gives sound advice about sources of interference and methods of curing them C1 Wireless Transmission and Reception [2.9 MB] C2 Interference with Reception of Broadcasting [1.2 MB] |
| Group D Telephony D1 Elementary Principles D3 Exchange Signals D4 Mag Exchs Non-Mult D5 Mag Exchs Mult D11 CB Exchs 22 V D13 Trunk Exchs D14 Maintenance Man Exchs D15 Tele Test Equipment D16 Routine Test Man Exchs D17 Int Cabling & Wiring D18 Dis Cases etc D19 Cord Repairs D20 Superposed Ccts etc D22 Units Amplifying |
This group refers generally to manual telephony. D1 Elementary Principles of Telephony [1.4 MB] D3 Principles of Telephone Exchange Signals [941 kB] D4 Magneto Exchanges Non-Multiple Type [2.0 MB] D5 Magneto Exchanges Multiple Type [756 kB] D11 CB Exchanges 22 Volts [1.3 MB] D13 Trunk Telephone Exchanges [1.3 MB] D14 Maintenance of Manual Telephone Exchanges [824 kB] D15 Telephone Testing Equipment [2.0 MB] D16 Rountine Testing for Manual Telephone Exchanges [1.2 MB] D17 Internal Cabling and Wiring [650 kB] D18 Distribution Cases, MDF and IDF [1.1 MB] D19 Cord Repairs Both Instrument and Switchboard Cords [2.0 MB] D20 Superposed Circuits, Transformers, Bridging Coils and Retardation Coils [802 kB] D22 Units Amplifying [2.6 MB] |
| Group E Automatic Telephony E2 CCI Working E3 Keysending "B" Posns |
Automatic Telephony never really got going with the Technical Pamphlets. Apart from E1 'Automatic Telephony' these two were the only ones ever issued, as far as I know. E2 Coded Call Indicator Working [1.6 MB] E3 Keysending "B" Positions [1.5 MB] |
| Group F Subscribers Apparatus F1 Subs Apps - Common Battery F2 Subs Apps - CBS No 1 System F3 Subs Apps - Magneto System F3 Appendix N-Diagrams F4 PBXs CB System F5 PBXs CB Mult No 9 F6 PBXs Magneto F7 House Tele Systems F8 Wiring of Subs' Premises |
Covers everything from telephones to private branch exchanges (PBXs). F1 Subscribers' Apparatus - Common Battery System [910 kB] F2 Subscribers' Apparatus - C.B.S. No 1 System [1.3 MB] F3 Subscribers' Apparatus - Magneto System [1 MB] Appendix of N-Diagrams [1MB] F4 Private Branch Exchanges - Common Battery System [1.5 MB] F5 Private Branch Exchanges - C.B. Multiple No 9 [973 kB] F6 Private Branch Exchanges - Magneto System [1.2 MB] F7 House Telephone Systems [457 kB] F8 Wiring of Subscribers' Premises Digital recreation from Hywel Clatworthy's original. [375 kB] |
| Group G Power G1 Mtce Secondary Cells G2 Power Plant for Telecomms G3 Mtce of Power Plant G4 Telegraph Power Dis Boards |
G1 Maintenance of Secondary Cells [713 kB] G2 Power Plant for Telegraph and Telephony Purposes [1.1 MB] G3 Maintenance of Power Plant for Telegraph and Telephony Purposes [2.2 MB] G4 Telegraph Battery Power Distribution Boards [1.5 MB] |
| Group H Lines H1 Open Line Constructn Pt 1 H2 Open Line Constructn Pt 2 H3 Open Line Maintce H4 U/G Constructn Conduits H5 U/G Constructn Cables H6 U/G Maintenance H7 Cable Balancing H8 Power Circuit Guarding H9 Electrolytic Action H10 Conductor Constants |
H1 Open Line Construction Part 1 wooden pole practices, insulators etc [926 kB] H2 Open Line Construction Part 2 wiring, tools, terminations, jointing, etc [874 kB] H3 Open Line Maintenance [812 kB] H4 Underground Construction Part 1 - Conduits [1.4 MB] H5 Underground Construction Part 2 - Cables [1.7 MB] H6 Underground Maintenance [719 kB] H7 Cable Balancing Avoiding capacitive unbalance - pair transpositions etc [540 kB] H8 Power Circuit Guarding Protection against overhead power lines [849 kB] H9 Electrolytic Action on Cable Sheaths Causes of corrosion and counter measures [784 kB] H10 Constants of Conductors Used for Telegraph & Telephone Purposes [710 kB] |
| Group I Submarine & K Miscellaneous I1 Submarine Cables K3 Heating Systems K4 Pneumatic Tubes |
A few oddments at the end of the series I1 Submarine Cables For those working on Cable Ships [772 kB] K3 Heating Systems Covers (briefly) water and steam systems [618 kB] K4 Pneumatic Tube Systems House Systems as used in shops for carrying cash and Ticket Despatch systems used in telephone exchanges [1.9 MB] |
| Telecommunications Instructions B2009 LST 10 (Kirk) B2820 Keyphones F1011 Doric F1012 Harmony H 5189 PO Type 19 Relay M0045 Card Callmaker |
Again very few of these remain in my collection. B2009 LST 10 Loudspeaking Telephone No 10, LST 10 (Kirk). [332kB] B2820 Keyphones Keyphones with Code C DC signalling. [82kB] F1011 Doric Amplifier and Loudspekaer No 11A, Doric [26kB] F1012 Harmony Amplifier and Loudspekaer No 12A, Harmony [145kB] H5189 PO Type 19 Relay Descriptin, labelling, numbering and adjustments for the Type 19 Relay [149kB] M0045 Card Callmaker Marketing Instruction, Card Callmaker [140kB] |
| Telecom Gold - A Quick Guide | BT introduced an electronic mail service, Telecom Gold, in 1982, under licence from Dialcom in the USA. It linked into the Telex system and had a number of information providers. 100 pp 8.2 MB |
| TE & Loop Resistance | A 140. Transmission Equivalents and loop resistance of loaded and unloaded cable circuits. 30kB |
| User Guides LST 4 Minimaster 3 Minimaster Installation Rapport Plus Statesman Tremolo |
User Guides for Subscriber's Apparatus How to use the Loudspeaking Telephone No 4. 2pp 16 kB User Guide for the Minimaster 3 small exchange. 12pp 1.02 MB Installation Guide for the Minimaster 3 small exchange. 10pp 303 kB User guide for the Rapport Plus combined telephone and answering machine. 52pp 5.9 MB User Guide for the Statesman telephone, Telephone number 9101 - part of the InPhone range 8pp 427kB User Guide for the Tremolo Telephone, Telephone Number 9701, made by Northern Telecom - another of the InPhone range.1166 kB |
| History of the Telephone Instrument | A wall poster produced by British Telecom for use in schools. It shows various stages in the development of telephone instruments culminating in the push-button telephone. Reduced to A3 size 998 kB |
| The History of the Telephone | A later wall poster for use in schools. It shows key milestones and dates in the development of telephony up until the early mobiles. Reduced to A3 size 1.6 MB |
| The Language of Success | Saying the righ things at the right time. An A5 booklet from BT in 1991 that offers advice on making the most of your telephone calls both at work and at home. Courtesy of Mike Tyrrell. 36 pages 965 kB |
| Names & Dates for Students | Lavishly illustrated history of telecommunications giving the significant events from 1500 to the 1980s with a short paragraph on each along with pictures of the personalities. Published in 1984. 20 pages 4.1 MB |
| Public telephones | A 32-page booklet for schools telling the history of public phones from the early silence cabinets to the modern designs of the 1980s. Terrific pictures. LARGE FILE 12 MB |
| The Story of the Telephone | A lavishly illustrated 47-page educational booklet issued for use in schools. It dates from the 1970s. LARGE FILE 14 MB |
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