BSP Categories by early Letter Code (by Doc #)

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Alphanumeric codes, used from about 1930 until the early 1960s.

Documents

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H-85950-Office-Alarm-Circuit H-85950-Office-Alarm-Circuit

Date added: 09/24/2010
Date modified: 09/24/2010
Filesize: 4.47 MB
Downloads: 4376

E44.062 I1 Type K Carrier Ocr R E44.062 I1 Type K Carrier Ocr R

Date added: 02/10/2015
Date modified: 02/10/2015
Filesize: 2.16 MB
Downloads: 2362

Contributed by Steve Cichorsky.  OCR by Clint Gilliland.

E34.061 I5 K1 Carrier Telephone Terminal R E34.061 I5 K1 Carrier Telephone Terminal R

Date added: 02/10/2015
Date modified: 02/10/2015
Filesize: 1.16 MB
Downloads: 2445

Contributed by Steve Cichorsky. OCR by Clint Gilliland.

AB47.007 I1 Mar56 Bell System Capacitors AB47.007 I1 Mar56 Bell System Capacitors

Date added: 08/04/2013
Date modified: 08/04/2013
Filesize: 1.94 MB
Downloads: 3810

Contributed by John Novack.

AB43.910-3 AppA IA Jul50 500-Set Loop Design Tables 1950 Ocr AB43.910-3 AppA IA Jul50 500-Set Loop Design Tables 1950 Ocr

Date added: 09/19/2013
Date modified: 09/19/2013
Filesize: 640.6 kB
Downloads: 2905

Contributed by Clint Gilliland.

A702.625 I1 Mar63 23A Trans Measuring Set Desc E40.208 Ocr A702.625 I1 Mar63 23A Trans Measuring Set Desc E40.208 Ocr

Date added: 01/14/2014
Date modified: 01/14/2014
Filesize: 632.69 kB
Downloads: 2684

Contributed by John Novack.

A217.122 I7 May58 - Selector Oper Test Using Test Set Step A218.220 A252.001 Ocr R A217.122 I7 May58 - Selector Oper Test Using Test Set Step A218.220 A252.001 Ocr R

Date added: 01/24/2014
Date modified: 01/24/2014
Filesize: 407.13 kB
Downloads: 2472

Contributed by Steve Cichorsky.  OCR by Clint Gilliland

A128.820 Toll Switchboard No. 3C or 3CL, Issue 1, April 1950 - Checking List A128.820 Toll Switchboard No. 3C or 3CL, Issue 1, April 1950 - Checking List

Date added: 01/31/2010
Date modified: 01/31/2010
Filesize: 104.75 kB
Downloads: 3481

Checking List, BSP MP Items covering sequence charts, operational sketches and associated reference material. (Central Office Maintenance)

A128.820 Toll Switchboard No. 3C or 3CL, Issue 1, April 1950 - Charts A128.820 Toll Switchboard No. 3C or 3CL, Issue 1, April 1950 - Charts

Date added: 01/31/2010
Date modified: 01/31/2010
Filesize: 4.07 MB
Downloads: 3803

Sequence charts, operational sketches and associated reference material. (Central Office Maintenance)

A128.819 I5 A128.819 I5

Date added: 02/01/2010
Date modified: 02/01/2010
Filesize: 381.18 kB
Downloads: 3691

A128.819, Checking List - BSP MP Items Covering Sequence Charts,
Operational Sketches, and Associated Reference Material - No. 4A or 4M
Toll Switching System, Issue 5, Jan. 1954

4A 4M Xbar SC-OS-RM 4A 4M Xbar SC-OS-RM

Date added: 02/01/2010
Date modified: 02/01/2010
Filesize: 21.69 MB
Downloads: 3458

Toll Switching System No. 4A Sequence Charts, Operational Sketches and
Reference Material, Various Dates

Recent Contributors

Thanks for new documents from David Gruger, Jeff Lamb, Walt Aydelotte, Dennis Hock, Steve Flocke, Paul Wills, Sam Etler, Fred Haynes, John Novack, Clint Gilliland, Steve Cichorsky and Karl Brose.

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