Welcome to the TCI Library INBOX

Some files are temporarily stored here to permit quick sharing before being added to the Library.
Some have not been OCRed, so you may want to download the final copy later.
Files are removed from the INBOX when added to the Library.

If you expect to find a file here but don't see it, check the "30 Latest Additions" list on the Library Home Page.

Note that files in the INBOX can be found with Google site searches, but not the Library's Basic or Advanced Searches.

Our limited volunteers plan to stay reasonably current in processing non-switching documents.

Most files on this page are switching-related documents that are accumulating in the INBOX while we attempt to find and train volunteers to process them.
Interested in helping?

TCI Inbox Users - PLEASE READ THIS!

pdf TCI Library Statistics 2012mar12 SW BP X (27 KB)

TCI Library inbox

Filename Size Date & Time
An Adobe Acrobat file SD-95283-02_i1_rfs_Announcement_Circuit 357.17 KB 2019-05-25 20:05:42

TCI Library inbox OCR Done

Filename Size Date & Time
An Adobe Acrobat file ATT_LL_Diagram_WA13288_Jun58_Route_Interconnect_Antiago_AFB_to_Stevens_Point_tci-ocr 1.25 MB 2018-10-14 04:54:03
An Adobe Acrobat file ATT_LL_Diagram_WA13288_Jun58_Route_Interconnect_Antiago_AFB_to_Stevens_Point_tci_11x19_300_r 713.16 KB 2016-03-15 00:57:11
An Adobe Acrobat file ATT_Norway_IL_Regional_Switching_Center_1963_tci-ocr 788.31 KB 2018-10-14 04:54:02
An Adobe Acrobat file Bell_South_TR-73503_iG_Oct97_-_Eng_and_Inst_Stds_for_CO_Equip_tci-ocr 12.11 MB 2018-10-14 04:54:16
An Adobe Acrobat file CD-66717-01_i6D_Jul63_PBX_Attendant_Trunk_RTW_tci-ocr 208.01 KB 2018-10-14 04:54:20
An Adobe Acrobat file CEECO_Form_1015-6_Dec76_-_TD-4_Tone_Control_ocr_r_tci 1.96 MB 2017-11-21 05:32:11
An Adobe Acrobat file CEECO_Form_1015-6_Dec76_-_TD-4_Tone_Control_tci_ocr_r 1.96 MB 2015-03-02 04:55:15
An Adobe Acrobat file CMC_708_iD_Quik_Chek_II_tci-ocr 8.78 MB 2018-10-14 04:54:31
An Adobe Acrobat file ES-458369_i1_Jul39_extract_24_35-type_Fuse_Data_tci-ocr 59.42 KB 2018-10-14 04:54:32
An Adobe Acrobat file Ericsson_British_Plessy_UK_N2128H_wiring_tci_as-ocr 93.65 KB 2019-04-09 00:23:53
An Adobe Acrobat file GTE_AE_AH-580370-B_i2_Jan76_Connector_Ckt_Adjustment_tci_ocr 186.95 KB 2015-03-10 23:27:52
An Adobe Acrobat file GTE_AE_DH-580370-B_i8_ca1975_Connector_Ckt_Assy_and_Stocklist_tci_ocr 314.7 KB 2015-03-10 23:27:53
An Adobe Acrobat file GTE_AE_E-580370-B_i2_Jul70_Connector_Ckt_Explanation_tci_ocr 633.71 KB 2015-03-10 23:27:52
An Adobe Acrobat file GTE_AE_H-580370-B_i5_May74_Connector_Ckt_Schematic_tci_ocr_tci 174.29 KB 2015-03-10 23:27:52
An Adobe Acrobat file H-61970_i6_Feb70_AE_Reverting_Call_Switch_10pty_Harmonic-ocr 271.8 KB 2018-10-14 04:54:39
An Adobe Acrobat file H-85175_Dial_Speed_and_Spotter_Pulse_Testing_Circuit_Sheets_1-2_36x22_jn_sk_tci-ocr 754.72 KB 2018-10-14 04:54:40
An Adobe Acrobat file H-85919-A_Type_26A_Switch_Tester_Portable_Routine_Test_Set_Ckt_tci-ocr 297.25 KB 2018-10-14 04:54:40
An Adobe Acrobat file Lynch_B325_Schematic_Drawings_O_tci-ocr 7.49 MB 2018-10-14 04:54:44
An Adobe Acrobat file NE_N1293_GP_N1293_GY_N1293_A_N1393_BA_Schematics_tci_jl-ocr 702.27 KB 2018-10-14 04:54:45
An Adobe Acrobat file NTP_553-2001-450_Oct83_SL-1_Traffic_Measurement_tci_ocr_r 2.43 MB 2015-04-28 22:24:46
An Adobe Acrobat file NT_Intro_SL-1_Module_7_Traffic_tci_ocr_r 2.43 MB 2015-04-28 20:41:22
An Adobe Acrobat file NT_Meridian_SL-1_Traffic_Student_Materials_071_tci_ocr_r 3.37 MB 2015-04-28 20:42:35
An Adobe Acrobat file Northern_Telecom_Schematic_QSQM_500_A_AX_Desk_Sets_tci-ocr 762.74 KB 2018-10-14 04:54:46
An Adobe Acrobat file Number_One_Step-By-Step_Training_Manual_Vol_II_-_Sequence_Charts_and_Operational_Sketches_tci-ocr 2.72 MB 2018-10-14 04:54:52
An Adobe Acrobat file SC_Jul80_35A-1_Tone_Dial_Connections_tci_r_MM-ocr 452.76 KB 2018-10-14 04:54:51
An Adobe Acrobat file SD-66717-01_i12D_Jul63_PBX_Attendant_Trunk_RTW_tci-ocr 299.67 KB 2018-10-14 04:54:52
An Adobe Acrobat file Telco_Systems_Inc_of_TX_-_2WA_Electronic_Pulsing_Relay_Inst_for_WE_Sels_tci-ocr 99.46 KB 2018-10-14 04:54:52
An Adobe Acrobat file Telco_Systems_Inc_of_TX_-_3AR_Electronic_Pulsing_Relay_Inst_for_AE_Sels_and_Conns_tci-ocr 68.93 KB 2018-10-14 04:54:52
An Adobe Acrobat file Telco_Systems_Inc_of_TX_-_3AR_Electronic_Pulsing_Relay_Schematic_by_Flocke_tci-ocr 67.63 KB 2018-10-14 04:54:53
An Adobe Acrobat file Telco_Systems_Inc_of_TX_-_3WA_Electronic_Pulsing_Relay_Inst_for_WE_Sels_tci-ocr 281.09 KB 2018-10-14 04:54:53
An Adobe Acrobat file Telco_Systems_Inc_of_TX_-_WCR_Electronic_Pulsing_Relay_Inst_for_WE_LFs_tci-ocr 251.29 KB 2018-10-14 04:54:53
An Adobe Acrobat file Teletype_News_Mar68_tci-ocr 765.97 KB 2018-10-14 04:54:54

Steve-C's inbox

Filename Size Date & Time
An Adobe Acrobat file 028-000-000 Numerical Index - Division 028 - Issue 46 October 1978 tci 256.29 KB 2020-05-21 12:21:47
An Adobe Acrobat file 028-351-501 KS-20778 Head Telephone Sets and KS-21430 Issue 3 January 1975 tci 1.66 MB 2020-05-21 12:21:19
An Adobe Acrobat file 100-637-101 - KS-15874-Ll CARDMATIC Tube Tester - Issue 1 November 1959 tci 16.54 MB 2020-01-05 10:08:28
An Adobe Acrobat file 103-223-100 23A and 23D J94023A and J94023D Transmission Measuring Sets - Description - Issue 3 May 1969 tci 2.61 MB 2020-03-07 06:00:39
An Adobe Acrobat file 179-399-900PT WESCOM 452-FWA, E&M Inband Signaling Systems - Circuit Description - Issue A June 1971 tci 1.99 MB 2019-12-30 11:57:04
An Adobe Acrobat file 218-000-000 Numerical Index - Division 218 -No 5 Crossbar Offices Issue 86 February 1970 tci 1.41 MB 2020-02-01 09:19:13
An Adobe Acrobat file 218-000-001 Addendum - Alphabetical Index - No 5 Crossbar Offices - Issue 3 March 1969 tci 295.65 KB 2020-02-01 09:19:26
An Adobe Acrobat file 460-100-201 Station Protector and Signaling Grounds - Selection and Instal Issue 1 Nov 1967 tci 13.11 MB 2020-02-15 23:46:14
An Adobe Acrobat file 461-619-101 104A-104B Terminals-Outdoor Wiring - Issue 3 January 1961 tci 985.25 KB 2020-06-20 13:37:46
An Adobe Acrobat file 461-620-100 Matrix Block - 1A1 - Identification-Installation-Wiring and Maintenance-Issue 1 May 1966 tci 3.66 MB 2020-06-21 19:31:53
An Adobe Acrobat file 461-630-115 Television Jack Issue 1 August 1962 tci 1.45 MB 2020-06-25 09:21:12
An Adobe Acrobat file 500-116-400 Tip-Party ID for Stations Connected to Long-Line Equipment Issue 1 February 1962 tci 61.33 KB 2020-03-10 10:28:41
An Adobe Acrobat file 504-211-402 Consoles - 1 and 2 Types - Connections for No 5 Crossbar Prestandard Issue 2 May 1963 tci 1.68 MB 2020-01-29 08:54:57
An Adobe Acrobat file 660-474-500 Step Office NBO Selection for Terminal Balance Issue 1 November 1974 tci 1.36 MB 2020-02-19 10:09:14
An Adobe Acrobat file 981-010-100 Private Branch Exchange Tie Trunks - General Descriptive Information - Issue 1 August 1969 tci 2.46 MB 2020-02-08 12:31:27
An Adobe Acrobat file 1984 Olympic Games - Facility Trailer - Pacific Telephone - circa 1981-82 tci 2.11 MB 2020-06-20 09:42:16
An Adobe Acrobat file A301.808 - J86446 105D POWER PLANT - Issue 2 - 6-27-51 tci ocr 2.12 MB 2020-10-12 16:01:37
An Adobe Acrobat file A301.810 - 110A POWER PLANT - Issue 2 - July 1952 tci ocr 1.74 MB 2020-10-12 05:43:44
An Adobe Acrobat file A710.052 Patching and Testing Cord and Plug Assemblies - 2-Conductor Cords - Issue 10 Dec 1956 tci ocr 756.97 KB 2020-10-12 09:54:06
An Adobe Acrobat file ADDENDUM 506-110-303PT Coin Collectors - Prepay - Maintenance Two-Coil Coin Relay - Issue A September 1960 tci 171.81 KB 2020-06-05 11:27:46
An Adobe Acrobat file Bell System - Teletypewriter Directory - December 7 1931.pdf tci 2.78 MB 2020-07-12 13:12:54
An Adobe Acrobat file Benner-Nawman BN6100 Telecart tci ocr 699.38 KB 2021-01-14 21:07:56
An Adobe Acrobat file Benner-Nawman BN6101 - BN6102 Coin Furniture tci ocr 788.81 KB 2021-01-14 21:07:33
An Adobe Acrobat file C16.904 Plant Test Codes -Test Numbers and Call Lines - Issue A 4-1-59-N tci 258.15 KB 2020-02-27 05:17:47
An Adobe Acrobat file C16.990 - Work Sheets - Issue F 11-1-58-N tci 1.54 MB 2020-03-01 04:30:45
An Adobe Acrobat file CD-30976-01 3 OR 4 WIRE SELECTOR tci ocr 601.08 KB 2022-02-06 11:59:56
An Adobe Acrobat file CD-31347-01 OBSERVING LINE CIRCUIT - Issue 6D - Dwg Issue l5D tci ocr 1.48 MB 2021-11-11 19:31:52
An Adobe Acrobat file CD-31642-01 Test Line Circuit ocr tci 2.62 MB 2022-01-27 23:04:19
An Adobe Acrobat file CD-31728-01 Busy Line Cut-In Ckt for Completing Emergency Calls tci ocr 402.05 KB 2022-02-04 22:57:28
An Adobe Acrobat file CD-31811-01 10-Pty TPS Connector w-Reverting Calling tci ocr 1.02 MB 2022-02-15 07:48:34
An Adobe Acrobat file CD-31868-01 No 355A Interrupter Relay Circuit tci ocr 642.93 KB 2022-02-05 14:00:28
An Adobe Acrobat file CD-31932-01 Test Line for Local or Toll Train For Ringing and Continuity ocr tci 534.07 KB 2022-01-23 06:05:21
An Adobe Acrobat file CD-31975-01 Misc Alarm Ckt - Prepay Coin Trk Alarm and Coin Batt Fuse Alarm tci ocr 279.47 KB 2022-02-20 09:49:22
An Adobe Acrobat file CD-32093-01 Type B Emergency Manual Circuit for Interception of Subscriber Lines and Trunk Circuits - Issue 1 tci 1.07 MB 2020-01-27 18:29:18
An Adobe Acrobat file CD-32187-01 Aux Trunk Ckt Arranged to Restrict Service tci ocr 323.39 KB 2022-03-03 12:35:36
An Adobe Acrobat file CD-32199-01 SxS Outgoing Trunk Circuit to Crossbar Tandem tci ocr 426.07 KB 2022-02-12 00:58:05
An Adobe Acrobat file CEECO C-100 Return Loss Test Set - Operating Instructions 1960 tci 1.88 MB 2020-06-01 10:28:41
An Adobe Acrobat file CEECO Form 540 VF Transmission - Attenuation - Impedance of Loaded - Non-Loaded Telephone Cable October 1962 tci 1.39 MB 2020-06-22 01:31:55
An Adobe Acrobat file CUSTOMER SERVICE REFERENCE GUIDE - Pacific Telephone - Nevada Bell - 1980-82 tci ocr 797.15 KB 2020-12-27 06:19:41
An Adobe Acrobat file Cal Poly 701-B CENTREX - ATSS Net Access - 1973 tci ocr 429.09 KB 2022-03-10 21:59:11
An Adobe Acrobat file Chicago Dialing Instructions - Exchange Names - Illinois Bell - July 1950 tci 1.15 MB 2020-06-13 12:22:21
An Adobe Acrobat file Connecticut Telephones - Catalogue No. 29 - 1929 tci pn ocr 26.61 MB 2021-10-20 12:26:51
An Adobe Acrobat file Illinois Bell Substation Bulletin 3 - Western Electric 7A Coin Collector - April 1932 tci 15.67 MB 2020-06-27 06:49:12
An Adobe Acrobat file Method of Operation - No 177 Morro Bay - Emergency Manual Equipment - September 24 1943 tci 1.32 MB 2020-01-27 18:30:06
An Adobe Acrobat file Northern Telecom P705945 Centurion Payphones - Digitone Dial Replacement -Installation and Instruction - Issue 1 tci 360.01 KB 2020-07-09 07:05:39
An Adobe Acrobat file PALCO-Quadrum Type 120C Coin Telephone - Description-Installation-Programming - Issue 2 - CI473522 tci 2.6 MB 2020-06-29 06:45:38
An Adobe Acrobat file Pacific Telephone PBX Operating Practice - Description of No 506 Type Switchboard circa 1934 tci 3.74 MB 2020-02-18 07:03:01
An Adobe Acrobat file SD-1E059-01 51A Customer Premises System tci ocr 5.77 MB 2022-02-21 12:02:02
An Adobe Acrobat file SD-31359-02 Step-by-Step Systems No 1 - Current Drain tci ocr 2.31 MB 2020-11-12 05:28:14
An Adobe Acrobat file SD-31932-01 Test Line Circuit tci 2.3 MB 2022-01-17 15:10:30
An Adobe Acrobat file SD-32202-01 Intercept Trunk tci ocr 1.75 MB 2021-10-20 12:13:31
An Adobe Acrobat file SD-65714-01 557A Cord Switchboard tci ocr 1.58 MB 2021-11-05 09:29:14
An Adobe Acrobat file State of California Automatic Telecommunications Switching System Directory - 1967 tci ocr 4.1 MB 2022-03-11 07:25:31
An Adobe Acrobat file TM 11-2104 Linefinder Equipment SxS Central Office - May 1950 tci 13.19 MB 2020-06-16 06:11:09
An Adobe Acrobat file TM 11-5965-202-35 Field and Depot Maintenance - Handsets H-33D PT H-33E PT and H-33F PT May 8 1959 tci 1.41 MB 2020-06-17 09:22:28
An Adobe Acrobat file The Telephone Blackout in Portsmouth - City of Silence - June 8 1957 - Redux tci 10.25 MB 2020-06-15 08:39:13
An Adobe Acrobat file Western Electric 84A Test Set - General Description tci ocr 5.02 MB 2020-12-16 11:28:25

Steve-C's inbox OCR Done

Filename Size Date & Time
An Adobe Acrobat file CD-31642-01 Test Line Circuit ocr tci 2.62 MB 2022-02-04 22:48:40
An Adobe Acrobat file CD-32199-01 SxS Outgoing Trunk Circuit to Crossbar Tandem tci ocr 426.07 KB 2022-02-12 00:53:01
An Adobe Acrobat file CD-51546-01 APPLICATION SCHEMATIC FOR TD-3D TRANSMITTER-RECEIVER BAY ISSUE 11B - DWG ISSUE 36B tci-ocr 4.77 MB 2018-10-14 18:29:43
An Adobe Acrobat file CD-95890-01 Outpulser Connector Circuit - ANI Types B and C - Issue 4D tci-ocr 999.76 KB 2018-10-14 18:29:44
An Adobe Acrobat file Cutover Plan For The OKLD 4E-6073E Job August 1981 tci-ocr 5.54 MB 2018-10-14 18:29:51
An Adobe Acrobat file ED-31344-33 REVERTING CALL SELECTOR TEN-PARTY TPL RINGING 1937-1942 tci-ocr 1018.54 KB 2018-10-14 18:29:51
An Adobe Acrobat file ED-31530-30 200-Point Line Finder or Trunk Finder in No 1 or 350A - 200-Point Trunk Finder in 355A 1931-1948 tci-ocr 1.6 MB 2018-10-14 18:29:53
An Adobe Acrobat file ED-31597-31 Combination Toll and Local Connector - 10-Party TPL Code Ringing 1937-1940 tci-ocr 2.2 MB 2018-10-14 18:29:53
An Adobe Acrobat file ED-31933-31 or 4-Wire Selector Arranged to Absorb Digits Once or Repeatedly 1945-ocr 992.08 KB 2018-10-14 18:29:54
An Adobe Acrobat file H-75592-A_1963-06-14_Jun63_Two_Way_PABX_Tie_Trunk_Ckt_tci_ocr_se 1.92 MB 2019-11-19 01:49:42
An Adobe Acrobat file Instrument Circuits Design and Operation - Fault Locating - PTS 601 - 1938 Rev 1944 tci-ocr 4.94 MB 2018-10-14 18:30:16
An Adobe Acrobat file KSP601-OPO ITT 601A Key Telephone System - Issue 1 May 1979 tci -ocr 2.31 MB 2018-10-14 18:30:18
An Adobe Acrobat file L-4102 – Mod of 2-Way Trunk SD-31662-011 - For Toll Station Lines 1-07-36 tci-ocr 1.36 MB 2018-10-14 18:30:20
An Adobe Acrobat file Lynch B-500 B-510 O-Type Carrier Systems - 1964 tci -ocr 6.16 MB 2018-10-14 18:30:40
An Adobe Acrobat file Lynch Type B37 Carrier Telephone System - 12-15-58 tci-ocr 6.22 MB 2018-10-14 18:30:43
An Adobe Acrobat file Monotype Cordless PBX Photos and Pricelist - circa 1927 tci-ocr 9.06 MB 2018-10-14 18:30:52
An Adobe Acrobat file Monotype Standardized CB PBX Switchboards - Bulletin 102-E circa 1927 tci-ocr 18.99 MB 2018-10-14 18:31:02
An Adobe Acrobat file NORTH ELECTRIC CX All-Relay Community Dial Exchanges - Bulletin CX531 tci -ocr 28.12 MB 2018-10-14 18:31:13
An Adobe Acrobat file No 14 Toll Switching System - Pre-Preliminary Notes tci-ocr 211.52 KB 2018-10-14 18:30:57
An Adobe Acrobat file No 16L and 16R Transmitter -Western Electric Card Catalogue No-260 - July 31 1957 tci -ocr 67.8 KB 2018-10-14 18:30:57
An Adobe Acrobat file Northern Telecom Catalogue T50 - Section 1 - Electronic Switching Systems 1975 tci-ocr 4.43 MB 2019-04-15 22:53:05
An Adobe Acrobat file Northern Telecom Catalogue T50 - Section 2 - Electro-Mechanical Switching 1975 tci -ocr 11.45 MB 2019-04-15 22:53:07
An Adobe Acrobat file Northern Telecom Catalogue T50 - Section 4 - Switching Equipment - 1975 tci-ocr 7.05 MB 2019-04-15 22:53:12
An Adobe Acrobat file Northern Telecom Catalogue T50 - Section 8 - Test Sets - 1975 tci-ocr 13.53 MB 2019-04-15 22:53:15
An Adobe Acrobat file PACIFIC TEL and Tel - SUPERVISORS GUIDE -TOLL OFFICES - NorCal and Nev Area - SEPT 1946-ocr 2.23 MB 2018-10-14 18:31:27
An Adobe Acrobat file Pac List CD-SD-30 Announcement List- June 1963 tci-ocr 68.37 KB 2018-10-14 18:31:25
An Adobe Acrobat file Pacific Telephone Mobile Central Office – Sonoma California - September 29 1957 tci 2-ocr 21.02 MB 2018-10-14 18:31:39
An Adobe Acrobat file Palo Alto XBT Retirement Project - Coordination Program - 1985 tci-ocr 19.5 MB 2018-10-14 18:31:35
An Adobe Acrobat file Real-Time Network Routing In The ATT Network - Improved Service Quality At Lower Cost tci -ocr 3.05 MB 2018-10-14 18:31:36
An Adobe Acrobat file River Grove Illinois Central Office Fire 12-14-46 - Life Magazine Article 01-07-46 tci-ocr 11.63 MB 2018-10-14 18:31:46
An Adobe Acrobat file SECTION 57-PART 505 555 PBX SWITCHBOARD - CIRCUIT DESCRIPTION - September 1959 tci-ocr 1.23 MB 2018-10-14 18:52:43
An Adobe Acrobat file Specification For Paso Robles No 5 Crossbar Central Office tci-ocr 5.89 MB 2018-10-14 18:52:48
An Adobe Acrobat file Stromberg Carlson - T-1023 - Type E Local And Toll Test Panel - Operation Manual - 1958 tci-ocr 6.53 MB 2018-10-14 18:52:51
An Adobe Acrobat file Stromberg Carlson F-80A XY Dial PBX - T-1056 - Installation Instructions tci -ocr 4.52 MB 2018-10-14 18:52:54
An Adobe Acrobat file TSI_Solid_State_Relays_-_Installation_Instructions_-_Western_Electric_SxS_Switches_tci-ocr 160.3 KB 2018-10-14 18:53:41
An Adobe Acrobat file The New McBerty Automatic Telephone System - North Electric tci (small)-ocr 3.01 MB 2018-10-14 18:53:25
An Adobe Acrobat file The New McBerty Automatic Telephone System - North Electric tci-ocr 39.34 MB 2018-10-14 18:53:46
An Adobe Acrobat file Webster Electric Telephone Products - TCL-Series tci-ocr 18.63 MB 2018-10-14 18:53:51

connections-museum

Filename Size Date & Time
An Adobe Acrobat file Bell-System-Film-Catalog 183.79 MB 2022-05-04 20:37:34
An Adobe Acrobat file Bell-System-Film-Catalog-smaller 126.85 MB 2022-05-04 20:34:19
An Adobe Acrobat file CD-25012-01_Subscriber-Sender_iss31 7.16 MB 2019-10-16 19:23:17
An Adobe Acrobat file CD-25013-01_Full-Selector-Term-Sender 4.37 MB 2019-10-16 19:23:15
An Adobe Acrobat file CD-25221-01_Originating-and-Auxiliary-Sender-Test_A_iss25 46.49 MB 2019-10-16 19:25:21
An Adobe Acrobat file CD-25221-01_Originating-and-Auxiliary-Sender-Test_B_foldouts 15.79 MB 2019-10-16 19:23:51
An Adobe Acrobat file CD-25221-01_Originating-and-Auxiliary-Sender-Test_C_appendix 2.06 MB 2019-10-16 19:23:12
An Adobe Acrobat file CD-25292-01_Incoming-Trunk-Circuit 7.68 MB 2019-10-16 19:23:17
An Adobe Acrobat file CD-25550-01_Flatspring-Marker 26.72 MB 2020-02-23 05:30:53
An Adobe Acrobat file CD-25550-01_app 10.12 MB 2020-02-23 05:29:43
An Adobe Acrobat file CD-25554-01_Subscriber-Sender-Link-and-Controller 1.89 MB 2019-10-16 19:23:16
An Adobe Acrobat file CD-25572-01_Trouble-Recorder-Control-and-Test 667.34 KB 2019-10-16 19:27:51
An Adobe Acrobat file CD-25805-01_MTC-Connector 13.64 MB 2020-02-23 05:32:39
An Adobe Acrobat file CD-28111-01_5XB-Maintenance-Data-Transmitter 712.06 KB 2019-10-16 19:27:57
An Adobe Acrobat file CD-31811-01_Common-Connector-Revertive-Calls_ALL_ISSUES_OCR 2.63 MB 2019-06-24 00:12:49
An Adobe Acrobat file CD-32245-01_Step-Outgoing-Trunk-Circuit-to-CAMA-or-TSPS_iss-1-to-8 9.87 MB 2018-11-24 03:40:42
An Adobe Acrobat file CD-32328-01_Step-By-Step_Push-Button-Signal-to-Dial-Pulse-Converter.pdf_ISS1-ocr 1.47 MB 2018-11-04 05:55:59
An Adobe Acrobat file CD-32374-01_Step-Number-Network-and-Identifier-Circuit-ANI-C_iss1-3 2.89 MB 2018-11-24 03:40:30
An Adobe Acrobat file CD-94851-01_Scanner-Distributor 249.35 KB 2019-10-16 19:27:58
An Adobe Acrobat file CD-95677-01_Common-Systems-CARW-Code-Generating-Circuit_iss3AR 141.12 KB 2019-10-16 19:23:17
An Adobe Acrobat file CD-95677-01_Common-Systems-CARW-Code-Generator-Circuit_iss2B 133.95 KB 2019-10-16 19:23:17
An Adobe Acrobat file CD-95678-01_Common-Systems-CARW-Dial-Pulse-Receiving-and-Distributing-Circuit_iss6D 834.77 KB 2019-10-16 19:23:18
An Adobe Acrobat file CD-95683-01-Common-Systems-CARW-Signaling-Receiving-and-Sending_iss3D 591.61 KB 2019-10-16 19:23:18
An Adobe Acrobat file CD-95683-01_Common-Systems-CARW-Signaling-Receiving-and-Sending_iss2D 150.51 KB 2019-10-16 19:23:18
An Adobe Acrobat file CX100_00_front-Cover 9.8 MB 2021-05-02 16:01:29
An Adobe Acrobat file CX100_01_Mostly-Handwritten-Notes 51.88 MB 2021-05-02 16:03:58
An Adobe Acrobat file CX100_02_Border 1.56 MB 2021-05-02 16:01:34
An Adobe Acrobat file CX100_03_Numbering-of-Prints 83.89 MB 2021-05-02 16:05:37
An Adobe Acrobat file CX100_04_Border 1.66 MB 2021-05-02 16:04:05
An Adobe Acrobat file CX100_05_Lines-and-Trunks 37.73 MB 2021-05-02 16:05:21
An Adobe Acrobat file CX100_06_Installation-CX30-CX60-CX90 64.26 MB 2021-05-02 16:08:23
An Adobe Acrobat file CX100_07_Installation-CX10 44.24 MB 2021-05-02 16:07:54
An Adobe Acrobat file CX100_08_CX10-General 30.73 MB 2021-05-02 16:09:03
An Adobe Acrobat file CX100_09_Changes-Updates-Traffic-Engineering-and-More 78.74 MB 2021-05-02 16:12:35
An Adobe Acrobat file CX100_10_North-Electric-CX-Type-Dial-Equipment-General 83.65 MB 2021-05-02 16:12:33
An Adobe Acrobat file CX100_11_Expansion-of-CX-Switchboards 36 MB 2021-05-02 16:13:36
An Adobe Acrobat file CX100_12_Principles-of-Relay-Selector 9.96 MB 2021-05-02 16:13:45
An Adobe Acrobat file CX100_13_Installing-CX30-60-90-100-200 52.84 MB 2021-05-02 16:15:26
An Adobe Acrobat file CX100_14_North-All-Relay-Automatic-System-1 12.78 MB 2021-05-02 16:14:43
An Adobe Acrobat file CX100_14_North-All-Relay-Automatic-System-2 14.51 MB 2021-05-02 16:15:55
An Adobe Acrobat file CX100_15_Letter-From-North-To-Telco-with-Circuit-Description 13.84 MB 2021-05-02 16:15:52
An Adobe Acrobat file CX100_15_Letter-From-North-To-Telco-with-Circuit-Description2 12.87 MB 2021-05-02 16:16:17
An Adobe Acrobat file CX100_92_Introduction-to-All-Relay-Equipment-in-Rural-Exchanges 33.81 MB 2021-05-02 16:19:02
An Adobe Acrobat file CX100_93_The-North-All-Relays-System-Brochure 8.37 MB 2021-05-02 16:16:33
An Adobe Acrobat file CX100_94_A-Private-System-of-Telephones-Brochure 14.98 MB 2021-05-02 16:16:59
An Adobe Acrobat file CX100_95_All-Relay-Switchboard-2-Ads 6.93 MB 2021-05-02 16:17:13
An Adobe Acrobat file CX100_96_Self-Regulating-Chargers-Brochure 17.6 MB 2021-05-02 16:17:47
An Adobe Acrobat file CX100_97_Battery-Charger-Pamphlet 36.94 MB 2021-05-02 16:19:05
An Adobe Acrobat file CX100_98_North-Electric-All-Relay-Automatic-Telephone-System-Brochure 23.76 MB 2021-05-02 16:19:52
An Adobe Acrobat file CX100_99_photos-and-back-cover 50.51 MB 2021-05-02 16:20:53
An Adobe Acrobat file Civil-Defense_Kenwood-Building-Seattle_Survival-Plan_1957_ocr 34.53 MB 2019-09-06 18:00:16
An Adobe Acrobat file Crossbar Tandem Switching System 552.76 MB 2020-02-23 05:41:14
An Adobe Acrobat file Fundamentals-of-Equipment-Engineering-WECo_1945 69.41 MB 2020-02-23 05:24:31
An Adobe Acrobat file Fundamentals-of-Switching 304.15 MB 2022-05-04 21:45:42
An Adobe Acrobat file Fundamentals-of-Switching-ocr 308.3 MB 2022-05-06 17:24:27
An Adobe Acrobat file No. 1 XBAR - Lamps Jacks Keys 39.47 MB 2020-02-23 05:31:35
An Adobe Acrobat file No. 1 XBAR - Plant Training IL Bell_Oct52 1.96 MB 2020-02-23 05:31:51
An Adobe Acrobat file No. 1 XBAR - TTI Term Trouble Analysis 22.34 MB 2020-02-23 05:32:31
An Adobe Acrobat file No. 1 XBAR - Term Sdr Test 84.29 MB 2020-02-23 05:33:55
An Adobe Acrobat file No. 5-Crossbar-Dial-Telephone-System_1953 130.52 MB 2019-10-16 19:32:43
An Adobe Acrobat file Porta-Systems-Relay-Repair-Kit 3.19 MB 2022-05-04 07:05:58
An Adobe Acrobat file RE-Hersey_Panel-Dial-Systems_1929_ocr 81.03 MB 2020-04-12 16:42:51
An Adobe Acrobat file SD-1C904_Tape-Data-Controller 4.65 MB 2019-06-24 00:13:39
An Adobe Acrobat file SD-25016-01_Originating-Marker 76.03 MB 2020-02-23 05:34:54
An image file SD-25292-011_Incoming-Trunk 44.65 MB 2020-02-23 05:33:52
An Adobe Acrobat file SD-26043-01_Incoming-Register-Revertive-Pulse 3.14 MB 2019-10-16 19:27:58
An Adobe Acrobat file SD-28111-01_Maintenance-Data-Transmitter 4.92 MB 2019-10-16 19:28:06
An Adobe Acrobat file SD-31141-01_iss26_Test-Circuit-for-Station-Ringers 4.36 MB 2018-11-30 03:45:28
An Adobe Acrobat file SD-32245-01_Step-Systems-Trunk-Circuit-to-CAMA-or-TSPS-Office-with-ANI 7.27 MB 2018-11-21 22:22:58
An Adobe Acrobat file SD-69076_iss 14 1.7 MB 2018-11-30 04:14:02
An Adobe Acrobat file SD-69195_iss 5 3.41 MB 2018-11-30 04:14:00
An Adobe Acrobat file Western-Electric-N2-Carrier 8.57 MB 2022-05-04 07:05:50
An Adobe Acrobat file Western-Electric-T1-Carrier 16.35 MB 2022-05-04 07:05:52
An Adobe Acrobat file X-75504_Electrical-Indicating-Instruments_Meters_and_Meter-Type-Relays 7.87 MB 2022-04-05 02:26:39
An Adobe Acrobat file X-75517_Cords 13.01 MB 2022-04-05 02:27:08
An Adobe Acrobat file X-75519_Relays-and-Circuit-Arrangements-for-Time-Delay 640.57 KB 2022-04-05 02:27:08
An Adobe Acrobat file X-75525_Resistors_iss2 12.49 MB 2022-04-05 02:27:00
An image file cs-longlines-cutaway 13.03 MB 2022-05-04 21:11:33
An Adobe Acrobat file graphics-standards 176.33 MB 2022-05-04 07:13:41
An Adobe Acrobat file weird-roller-phones-lol 4.78 MB 2022-08-20 22:04:05

 

 

Files used for illustration to support the Telephony 101 discussions held on the TCI Listserv beginning in November 2012.  See the first document in the list below for the event announcement. The last document is an errata sheet developed during the event that should be added to your copy of the book

Discussion was based on the book "Old Time Telephones!"  by Ralph Meyer.  Info about and sources of the book are available here: http://pws.goeaston.net/oldtimetelephones/index.html.  

Using these documents, you can work through the book and discussions at your own pace.

Telephony 101

Filename Size Date & Time
An Adobe Acrobat file 00a Telephony 101 -- An Announcement for TCI List 13.31 KB 2017-11-21 05:33:12
An Adobe Acrobat file 00b Telephony 101 -- Archive of Notes 8.8 KB 2017-11-21 05:33:12
An Adobe Acrobat file 00c Telephony 101 -- Pop Quiz after Chapter 7 21.02 KB 2017-11-21 05:33:12
An Adobe Acrobat file 00d Telephony 101 -- Epilog 12.97 KB 2017-11-21 05:33:12
An Adobe Acrobat file 01a Telephony 101 -- Voltage, Currents, and Resistance 30.23 KB 2017-11-21 05:33:12
An Adobe Acrobat file 01b Telephony 101 -- Electromagnets and the Telegraph 13.45 KB 2017-11-21 05:33:12
An Adobe Acrobat file 01c Telephony 101 -- The Reis Telephone 19.03 KB 2017-11-21 05:33:12
An Adobe Acrobat file 01d Telephony 101 -- The Harmonic Telegraph 21.03 KB 2017-11-21 05:33:12
An Adobe Acrobat file 01e Telephony 101 -- The Gallows Telephone 21.54 KB 2017-11-21 05:33:12
An Adobe Acrobat file 01f Telephony 101 -- Bell's Patent 17.94 KB 2017-11-21 05:33:12
An Adobe Acrobat file 01g TCI Article on Bell vs Gray 785.55 KB 2017-11-21 05:33:12
An Adobe Acrobat file 02a Telephony 101 -- Resistance Transmitters 20.1 KB 2017-11-21 05:33:12
An Adobe Acrobat file 02b Telephony 101 -- Non-positional Transmitters 15.91 KB 2017-11-21 05:33:12
An Adobe Acrobat file 02c Telephony 101 -- Transmitter Specifications 25.66 KB 2017-11-21 05:33:12
An Adobe Acrobat file 03a Telephony 101 -- Bell's Receiver 16.81 KB 2017-11-21 05:33:12
An Adobe Acrobat file 03b Telephony 101 -- Receiver Specifications 20.62 KB 2017-11-21 05:33:12
An Adobe Acrobat file 04a Telephony 101 -- Transformers 23.35 KB 2017-11-21 05:33:12
An Adobe Acrobat file 04b Telephony 101 -- Matching Impedances 15.74 KB 2017-11-21 05:33:12
An Adobe Acrobat file 04c Telephony 101 -- Induction Coils 14.8 KB 2017-11-21 05:33:12
An Adobe Acrobat file 05 Telephony 101 -- Magnetos 15.94 KB 2017-11-21 05:33:12
An Adobe Acrobat file 06a Telephony 101 -- Polarized Ringers 13.5 KB 2017-11-21 05:33:12
An Adobe Acrobat file 06b Telephony 101 -- Condensers 20.33 KB 2017-11-21 05:33:12
An Adobe Acrobat file 06c Telephony 101 -- Selective Ringing 14.42 KB 2017-11-21 05:33:12
An Adobe Acrobat file 06d Telephony 101 -- Ringer Properties 16.19 KB 2017-11-21 05:33:12
An Adobe Acrobat file 07a Telephony 101 -- Switches and Dials 17.83 KB 2017-11-21 05:33:12
An Adobe Acrobat file 07b TCI Article on Pulse-toTone Converters 283.4 KB 2017-11-21 05:33:12
An Adobe Acrobat file 08 Telephony 101 -- Early Commercial Telephones 17.26 KB 2017-11-21 05:33:12
An Adobe Acrobat file 09 Telephony 101 -- Single-box Magneto Wall Phones 12.89 KB 2017-11-21 05:33:12
An Adobe Acrobat file 10 Telephony 101 -- Candlestick Desk Stands 13.62 KB 2017-11-21 05:33:12
An Adobe Acrobat file 11 Telephony 101 -- Handset Desk Stands 17.23 KB 2017-11-21 05:33:12
An Adobe Acrobat file 12 Telephony 101 -- Ringer Boxes Etc 17.74 KB 2017-11-21 05:33:12
An Adobe Acrobat file 13a Telephony 101 -- Combined Telephones 16.05 KB 2017-11-21 05:33:12
An Adobe Acrobat file 13b TCI Article on WE 302 Postage Stamp 366.95 KB 2017-11-21 05:33:12
An Adobe Acrobat file 14a Telephony 101 -- Standard Rotary Dial Telephones 693.91 KB 2017-11-21 05:33:12
An Adobe Acrobat file 14b Telephony 101 -- Touchtone and Other Telephones 17.45 KB 2017-11-21 05:33:12
An Adobe Acrobat file 15a Telephony 101 -- Principles of Std LB Circuit 18.11 KB 2017-11-21 05:33:12
An Adobe Acrobat file 15b Telephony 101 -- Wiring of Std LB Circuit 20.17 KB 2017-11-21 05:33:12
An Adobe Acrobat file 16a Telephony 101 -- Principles of the Booster Circuit 22.37 KB 2017-11-21 05:33:12
An Adobe Acrobat file 16b Telephony 101 -- Examples of the Booster Circuit 18.85 KB 2017-11-21 05:33:12
An Adobe Acrobat file 16c Telephony 101 -- Other Early CB Circuits 14.3 KB 2017-11-21 05:33:12
An Adobe Acrobat file 17a Telephony 101 -- WE Anti-sidetone Circuit 26.58 KB 2017-11-21 05:33:12
An Adobe Acrobat file 17b Telephony 101 -- Kellogg's Anti-sidetone Circuit 24.07 KB 2017-11-21 05:33:12
An Adobe Acrobat file 17c TCI Article on AST Clarification 450.92 KB 2017-11-21 05:33:12
An Adobe Acrobat file 17d Telephony 101 -- S-C Anti-sidetone Circuits 14.04 KB 2017-11-21 05:33:12
An Adobe Acrobat file 17e Telephony 101 -- AE Anti-sidetone Circuits 16.67 KB 2017-11-21 05:33:12
An Adobe Acrobat file 18a Telephony 101 -- Bridge Local Battery AST Circuit 101.83 KB 2017-11-21 05:33:12
An Adobe Acrobat file 18b Telephony 101 -- Other Local Battery AST Circuits 16.09 KB 2017-11-21 05:33:12
An Adobe Acrobat file 19a Telephony 101 -- Network Circuits and Varistors 19.12 KB 2017-11-21 05:33:12
An Adobe Acrobat file 19b Telephony 101 -- Touchtone Dialing 17.45 KB 2017-11-21 05:33:12
An Adobe Acrobat file 19c Telephony 101 -- Variations of the Network Circuit 15.58 KB 2017-11-21 05:33:12
An Adobe Acrobat file 20 Telephony 101 -- Mechanical Restoration 18.31 KB 2017-11-21 05:33:12
An Adobe Acrobat file 21 Telephony 101 -- Tests and Measurements 15.09 KB 2017-11-21 05:33:12
An Adobe Acrobat file 22a Telephony 101 -- Electrical Repair and Modification 14.66 KB 2017-11-21 05:33:12
An Adobe Acrobat file 22b Telephony 101 -- Regulations and REN Numbers 18.95 KB 2017-11-21 05:33:12
An Adobe Acrobat file Errata Jan 26 2016 Booklet Format 457.88 KB 2016-02-06 16:52:33
An Adobe Acrobat file Errata Jan 26 2016 Letter Format 535.86 KB 2016-02-06 17:12:48
An Adobe Acrobat file Errata Nov 2013 Booklet Format 1.05 MB 2017-11-21 05:33:12
An Adobe Acrobat file Errata Nov 2013 Letter Format 994.31 KB 2017-11-21 05:33:12

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* Telephone Collectors International was incorporated under the laws of the state of Kansas on May 13, 1986. The goal of the organization is "to educate the public, as well as the members of the Corporation, regarding the history of telephony, the value of old telephones and related items, their collectability and preservation; to research telephone history and publish and provide literature thereon; to promote the public exhibition of old telephones and related items; and to promote common courtesies and guidelines for use by the public."

Telephone Collectors International is recognized by the Internal Revenue Service as a 501(c)(3) organization, to which U.S. tax deductible contributions can be made.

Welcome to the TCI Library INBOX

The Inbox was created to provide a temporary home for files being discussed on the TCI Listserv that have not been added to the Library's database. 

The Inbox provides instant access to all with unlimited download capability, and is a free and freely available alternative to limited file sharing services such as TransferBigFiles.

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  Filling the INBOX

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  • If files are downloaded within the limit, they are uploads it to the Inbox, making them available to others for unlimited downloads.

  • Therefore, there is no reason for anyone to scramble to be one of the first 20. 

     

    Emptying the INBOX

  • Usually, soon after the original version is in the Inbox, depending on his available time, a volunteer will put a smaller more optimized text searchable OCRed version of large files here or in the main Library, with the letters “ocr” appended to the filename.  So it might be worthwhile in many cases for people to wait for the OCRed versions.
     
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Steve C. posts scans directly to the Steve-C INBOX.  Files moved to the Library are deleted from the Steve-C INBOX.

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rev 5

THANK YOU!

The TCI Library would not be possible without the contributions of those who provided the scans of the documents and schematics that make up the library. Without those contributions, such a collection would be impossible.

We would like to thank the following people for their advice, help and/or contributions:

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Telephone Collectors International was incorporated under the laws of the state of Kansas on May 13, 1986. The goal of the organization is "to educate the public, as well as the members of the Corporation, regarding the history of telephony, the value of old telephones and related items, their collectability and preservation; to research telephone history and publish and provide literature thereon; to promote the public exhibition of old telephones and related items; and to promote common courtesies and guidelines for use by the public." Telephone Collectors International is recognized by the Internal Revenue Service as a 501(c)(3) organization, to which U.S. tax deductible contributions can be made.