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Attachments
| Name | Size | Creator | Creation Date | Labels | Comment | |||
|---|---|---|---|---|---|---|---|---|
| PDF File 984-525-132_I1.pdf | 782 kB | Shaun Ewing | Aug 01, 1980 00:00 |
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No. 4 Electronic Switching System - Service Observing Circuits - General Descriptive Information - Service Evaluation Systen No. 1A (Issue 1) | |||
| Version 1 (current) | 782 kB | Shaun Ewing | Aug 01, 1980 00:00 | No. 4 Electronic Switching System - Service Observing Circuits - General Descriptive Information - Service Evaluation Systen No. 1A (Issue 1) | ||||
| PDF File 961.501.06_I1.pdf | 3.98 MB | Shaun Ewing | Jan 01, 1961 00:00 |
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No. 12 Service Observing Desk - AMA and CAMA Service Observing Circuits (Issue 1) | |||
| Version 1 (current) | 3.98 MB | Shaun Ewing | Jan 01, 1961 00:00 | No. 12 Service Observing Desk - AMA and CAMA Service Observing Circuits (Issue 1) | ||||
| PDF File 961.501.05_I1.pdf | 489 kB | Shaun Ewing | Jan 01, 1961 00:00 |
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No. 12 Service Observing Desk - Local Dial Service Observing Circuits (Issue 1) | |||
| Version 1 (current) | 489 kB | Shaun Ewing | Jan 01, 1961 00:00 | No. 12 Service Observing Desk - Local Dial Service Observing Circuits (Issue 1) | ||||
| PDF File 961.501.04_I1.pdf | 4.05 MB | Shaun Ewing | Jan 01, 1961 00:00 |
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No. 12 Service Observing Desk - Speed-of-Answer and Auxiliary Observing Circuits (Issue 1) | |||
| Version 1 (current) | 4.05 MB | Shaun Ewing | Jan 01, 1961 00:00 | No. 12 Service Observing Desk - Speed-of-Answer and Auxiliary Observing Circuits (Issue 1) | ||||
| PDF File 961.501.03_I1.pdf | 1.26 MB | Shaun Ewing | Jan 01, 1961 00:00 |
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No. 12 Service Observing Desk - Cord Service Observing Circuits (Issue 1) | |||
| Version 1 (current) | 1.26 MB | Shaun Ewing | Jan 01, 1961 00:00 | No. 12 Service Observing Desk - Cord Service Observing Circuits (Issue 1) | ||||
| PDF File 961.501.02_I1.pdf | 2.22 MB | Shaun Ewing | Jan 01, 1961 00:00 |
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No. 12 Service Observing Desk - Incoming Intertoll Service Observing Circuits (Issue 1) | |||
| Version 1 (current) | 2.22 MB | Shaun Ewing | Jan 01, 1961 00:00 | No. 12 Service Observing Desk - Incoming Intertoll Service Observing Circuits (Issue 1) | ||||
| PDF File 961.501.01_I3.pdf | 7.08 MB | Shaun Ewing | Jan 01, 1961 00:00 |
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No. 12 Service Observing Desk - General Information - Desk Circuits and Equipment (Issue 3) | |||
| Version 1 (current) | 7.08 MB | Shaun Ewing | Jan 01, 1961 00:00 | No. 12 Service Observing Desk - General Information - Desk Circuits and Equipment (Issue 3) | ||||
| PDF File 951.081.01PT_Add_IA.pdf | 70 kB | Shaun Ewing | Jan 01, 1961 00:00 |
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Civil Air Raid Warning System for Disseminating Warnings from Keypoints and Subkeypoints to Warning Stations and Siren Control Stations (Issue A) | |||
| Version 1 (current) | 70 kB | Shaun Ewing | Jan 01, 1961 00:00 | Civil Air Raid Warning System for Disseminating Warnings from Keypoints and Subkeypoints to Warning Stations and Siren Control Stations (Issue A) | ||||
| PDF File 987.200.23_I2.pdf | 1.67 MB | Shaun Ewing | Nov 01, 1960 00:00 |
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E2B and E3B 2400- and 2600-Cycle Single-Frequency Signaling Units with E and M Leads - Common Systems (Issue 2) | |||
| Version 1 (current) | 1.67 MB | Shaun Ewing | Nov 01, 1960 00:00 | E2B and E3B 2400- and 2600-Cycle Single-Frequency Signaling Units with E and M Leads - Common Systems (Issue 2) | ||||
| PDF File 991.006.04_I1.pdf | 1.12 MB | Shaun Ewing | May 01, 1960 00:00 |
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PBX Systems - Range Chart - Trunk and Station Conductor Loop Ranges for PBXs Connected To Panel Central Offices Having 635-Ohm Subscriber Conductor Loop - 50-Ohm Talking Battery Feed Circuit - AC-DC or Superimposed Ringing (72, 80, or 84 Volts Minimum AC Component) - Minimum Office Voltage of 21V (Floating) (Issue 1) | |||
| Version 1 (current) | 1.12 MB | Shaun Ewing | May 01, 1960 00:00 | PBX Systems - Range Chart - Trunk and Station Conductor Loop Ranges for PBXs Connected To Panel Central Offices Having 635-Ohm Subscriber Conductor Loop - 50-Ohm Talking Battery Feed Circuit - AC-DC or Superimposed Ringing (72, 80, or 84 Volts Minimum AC Component) - Minimum Office Voltage of 21V (Floating) (Issue 1) | ||||
| PDF File 993.003.01PT_Add_IA.pdf | 57 kB | Shaun Ewing | Apr 01, 1960 00:00 |
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No. 153A Amplifier For Use with Head Telephone Sets (Issue A) | |||
| Version 1 (current) | 57 kB | Shaun Ewing | Apr 01, 1960 00:00 | No. 153A Amplifier For Use with Head Telephone Sets (Issue A) | ||||
| PDF File 991.006.01_I1.pdf | 1.50 MB | Shaun Ewing | Mar 01, 1960 00:00 |
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PBX Systems - Range Chart - Trunk and Station Conductor Loop Ranges for PBXs Connected To No. 1 Crossbar Central Offices Having 1300-Ohm Subscriber Conductor Loop - 400-Ohm Talking Battery Feed Circuit - AC-DC or Superimposed Ringing (84-88V AC Component) - Office Voltage of 48V (Floating) (Issue 1) | |||
| Version 1 (current) | 1.50 MB | Shaun Ewing | Mar 01, 1960 00:00 | PBX Systems - Range Chart - Trunk and Station Conductor Loop Ranges for PBXs Connected To No. 1 Crossbar Central Offices Having 1300-Ohm Subscriber Conductor Loop - 400-Ohm Talking Battery Feed Circuit - AC-DC or Superimposed Ringing (84-88V AC Component) - Office Voltage of 48V (Floating) (Issue 1) | ||||
| PDF File 991.102.02_I1.pdf | 5.37 MB | Shaun Ewing | Feb 01, 1960 00:00 |
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608A Private Branch Exchange - General Description (Issue 1) | |||
| Version 1 (current) | 5.37 MB | Shaun Ewing | Feb 01, 1960 00:00 | 608A Private Branch Exchange - General Description (Issue 1) | ||||
| PDF File 993.409.01_I1.pdf | 1.29 MB | Shaun Ewing | Oct 15, 1959 00:00 |
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General Description of SS1 Selective Signaling Systems (Issue 1) | |||
| Version 1 (current) | 1.29 MB | Shaun Ewing | Oct 15, 1959 00:00 | General Description of SS1 Selective Signaling Systems (Issue 1) | ||||
| PDF File 987.200.27_I1.pdf | 1.12 MB | Shaun Ewing | Oct 01, 1959 00:00 |
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E1F 2000- and 2600-Cycle Single-Frequency Signaling and 4-Wire Terminating Unit - Reverse Battery Supervision - Revertive Pulsing - Terminating Office End - Common Systems (Issue 1) | |||
| Version 1 (current) | 1.12 MB | Shaun Ewing | Oct 01, 1959 00:00 | E1F 2000- and 2600-Cycle Single-Frequency Signaling and 4-Wire Terminating Unit - Reverse Battery Supervision - Revertive Pulsing - Terminating Office End - Common Systems (Issue 1) | ||||
| PDF File 987.200.26_I1.pdf | 1.22 MB | Shaun Ewing | Oct 01, 1959 00:00 |
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E1E 2000- and 2600-Cycle Single-Frequency Signaling and 4-Wire Terminating Unit - Reverse Battery Supervision - Revertive Pulsing - Originating Office End - Common Systems (Issue 1) | |||
| Version 1 (current) | 1.22 MB | Shaun Ewing | Oct 01, 1959 00:00 | E1E 2000- and 2600-Cycle Single-Frequency Signaling and 4-Wire Terminating Unit - Reverse Battery Supervision - Revertive Pulsing - Originating Office End - Common Systems (Issue 1) | ||||
| PDF File 987.200.25_I1.pdf | 1.36 MB | Shaun Ewing | Jun 01, 1959 00:00 |
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E1D 2600-Cycle Single-Frequency Signaling and 4-Wire Terminating Unit - Reverse Battery Supervision - Terminating Office End - Common Systems (Issue 1) | |||
| Version 1 (current) | 1.36 MB | Shaun Ewing | Jun 01, 1959 00:00 | E1D 2600-Cycle Single-Frequency Signaling and 4-Wire Terminating Unit - Reverse Battery Supervision - Terminating Office End - Common Systems (Issue 1) | ||||
| PDF File 987.200.24_I1.pdf | 1.26 MB | Shaun Ewing | Jun 01, 1959 00:00 |
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E1C 2600-Cycle Single-Frequency Signaling and 4-Wire Terminating Unit - Reverse Battery Supervision - Originating Office End - Common Systems (Issue 1) | |||
| Version 1 (current) | 1.26 MB | Shaun Ewing | Jun 01, 1959 00:00 | E1C 2600-Cycle Single-Frequency Signaling and 4-Wire Terminating Unit - Reverse Battery Supervision - Originating Office End - Common Systems (Issue 1) | ||||
| PDF File 988.000.05_I1.pdf | 976 kB | Shaun Ewing | May 01, 1959 00:00 |
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Effects of Frequency Cutoff Characteristics on Spiking and Ringing of TV Signals (Issue 1) | |||
| Version 1 (current) | 976 kB | Shaun Ewing | May 01, 1959 00:00 | Effects of Frequency Cutoff Characteristics on Spiking and Ringing of TV Signals (Issue 1) | ||||
| PDF File 988.000.03_I1.pdf | 8.75 MB | Shaun Ewing | Mar 01, 1959 00:00 |
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Television - Video Tape Signal Analysis (Issue 1) | |||
| Version 1 (current) | 8.75 MB | Shaun Ewing | Mar 01, 1959 00:00 | Television - Video Tape Signal Analysis (Issue 1) |
