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 1770 downloads

Download (pdf, 21.69 MB)

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 1660 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 1741 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 1664 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 A217.122 I7 May58 - Selector Oper Test Using Test Set Step A218.220 A252.001 Ocr R Popular

By 633 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 A702.625 I1 Mar63 23A Trans Measuring Set Desc E40.208 Ocr Popular

By 648 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 AB43.910-3 AppA IA Jul50 500-Set Loop Design Tables 1950 Ocr Popular

By 840 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

Contributed by Clint Gilliland.

pdf AB47.007 I1 Mar56 Bell System Capacitors Popular

By 1130 downloads

Download (pdf, 1.94 MB)

AB47.007_i1_Mar56_Bell_System_Capacitors.pdf

AB47.007 I1 Mar56 Bell System Capacitors

Contributed by John Novack.

pdf E34.061 I5 K1 Carrier Telephone Terminal R

By 67 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

By 65 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 1771 downloads

Download (pdf, 4.47 MB)

H-85950-Office-Alarm-Circuit.pdf

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Recent Contributors

Thanks for new documents from Chuck Hensley, John Gilbert, Chuck Batson, Alan David, Steve Flocke, Paul Wills, Dave Gruger, Jim Prather, John Stancliff, Sam Etler, John Novack, Clint Gilliland, Steve Cichorsky and Paul Fassbender.

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