Folder BSP Categories by early Letter Code (by Doc #)

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

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Documents

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

By 4271 downloads

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4A_4M_Xbar_SC-OS-RM.pdf

4A 4M Xbar SC-OS-RM

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

pdf A128.819 I5 Popular

By 3928 downloads

Download (pdf, 381 KB)

A128.819_I5.pdf

A128.819 I5

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

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

By 4395 downloads

Download (pdf, 4.07 MB)

3C_3CL_SC-OS-RM.pdf

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

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

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

By 3803 downloads

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

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

pdf A199.850 iA Apr61 - CO Maintenance Telephone Directory Popular

By 2509 downloads

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A199.850_iA_Apr61_-_CO_Maintenance_Telephone_Directory_tci-ocr.pdf

A199.850 iA Apr61 - CO Maintenance Telephone Directory

Test Number Directory. Contributed by Steve Cichorsky. Processed by Remco Enthoven and Paul Fassbender.

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

By 2708 downloads

Download (pdf, 407 KB)

A217.122_i7_May58_-_Selector_Oper_Test_Using_Test_Set_Step_A218.220_A252.001_ocr_r.pdf

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

Contributed by Steve Cichorsky.  OCR by Clint Gilliland

pdf A438.675 i2D Apr40 - Switches 300 301 302 303-types Popular

By 1946 downloads

Download (pdf, 17.66 MB)

A438.675_i2D_Apr40_-_Switches_300_301_302_303-types_tci-ocr.pdf

A438.675 i2D Apr40 - Switches 300 301 302 303-types

Contributed by Steve Cichorsky. Processed by Remco Enthoven and Paul Fassbender.

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

By 2792 downloads

Download (pdf, 632 KB)

A702.625_i1_Mar63_23A_Trans_Measuring_Set_Desc_E40.208_ocr.pdf

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

Contributed by John Novack.

pdf A837.001 i1 Jun 1932 General Description No. 12 Switchboard Popular

By 716 downloads

Download (pdf, 3.35 MB)

A837.001-i1-jun-1932-general-description-no.12-switchboard.pdf

Contributed by: Remco Enthoven

From the collection of the JKL Museum of Telephony

pdf A837.002 i1 Apr 1936 General Description 640-line and 1440-line no. 12 Switchboard Popular

By 853 downloads

Download (pdf, 4.03 MB)

A837.002-i1-apr-1936-general-description-640-line-1440-line-no.12-switchboard.pdf

Contributed by: Remco Enthoven

From the collection of the JKL Museum of Telephony

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

By 2746 downloads

Download (pdf, 640 KB)

AB43.910-3_AppA_iA_Jul50_500-Set_Loop_Design_Tables_1950_ocr.pdf

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

PTT: Pacific Tel & Tel. Contributed by Clint Gilliland.

pdf AB46.372A i1 Sep50 - 372A Cold Cathode Tube Popular

By 1724 downloads

Download (pdf, 78 KB)

AB46.372A_i1_Sep50_372A_Cold_Cathode_Tube_tci_JS-ocr.pdf

AB46.372A i1 Sep50 - 372A Cold Cathode Tube

Contributed by John Stancliff.

pdf AB46.425A i4 Jun62 - 425A Electron Tube Popular

By 1649 downloads

Download (pdf, 117 KB)

AB46.425A_i4_Jun62_425A_Electron_Tube_tci_JS-ocr.pdf

AB46.425A i4 Jun62 - 425A Electron Tube

Contributed by John Stancliff.

pdf AB46.426A i4 Jan62 - 426A Electron Tube Popular

By 1764 downloads

Download (pdf, 102 KB)

AB46.426A_i4_Jan62_426A_Electron_Tube_tci_JS-ocr.pdf

AB46.426A i4 Jan62 - 426A Electron Tube

Contributed by John Stancliff.

pdf AB47.007 I1 Mar56 Bell System Capacitors Popular

By 3897 downloads

Download (pdf, 3.27 MB)

AB47.007_i1_Mar56_Bell_System_Capacitors_tci.pdf

AB47.007 I1 Mar56 Bell System Capacitors

Contributed by John Novack.

pdf E34.061 I5 K1 Carrier Telephone Terminal R Popular

By 2303 downloads

Download (pdf, 1.16 MB)

E34.061_I5_K1_Carrier_Telephone_Terminal_r.pdf

E34.061 I5 K1 Carrier Telephone Terminal R

Contributed by Steve Cichorsky. OCR by Clint Gilliland.

pdf E44.062 I1 Type K Carrier Ocr R Popular

By 2171 downloads

Download (pdf, 2.16 MB)

E44.062_I1_Type_K_Carrier_ocr_r.pdf

E44.062 I1 Type K Carrier Ocr R

Contributed by Steve Cichorsky.  OCR by Clint Gilliland.

pdf H-85950-Office-Alarm-Circuit Popular

By 3969 downloads

Download (pdf, 4.47 MB)

H-85950-Office-Alarm-Circuit.pdf

pdf H-series "Buildings" BSP Collection 1932-60 Popular

By 1259 downloads

Download (pdf, 21.54 MB)

H-series_Buildings_BSP_Collection_1932-60_tci_ocr.pdf

H-series "Buildings" BSP Collection 1932-60

624 pages. Collection of H-series "BUILDINGS" BSPs from 1932-1960. Includes an alpha index plus several numeric checking lists. The 1945 list includes some WR- (Wartime) BSPs, which (unfortunately) are not in the collection. If you have some of these, please contribute copies. BSPs are bookmarked by number, so use the index docs -- as you would with a paper archive. Note that the collection contents do not match the index documents, so refer to the bookmarks for the actual contents. Contributed by John Jones. Scanned and OCRed by John Novack.

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Recent Contributors

Thanks for new documents from Bruce Patterson, Jon Kolger, Paul Ivester, Len Hicken, Paul Fassbender, Fred Haynes, Kurt Rudolph, Wade ("Kellogg KITT"), the Connections Museum, Rick Walsh, Jeff Lamb, Jeremy Walters, Mark Cuccia, Alan David, Harry Joseph, Charlie Terry, Karl Brose, Dennis Hock, Tim Griffin, Remco Enthoven, and Steve Cichorsky.

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