Folder 310 Division - Private Line Tel Systems & Services

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310-200-300 I1
310-200-300     Switched Services Networks Using Central Office Switching Machines - Service Maintenance                    1       1963-08-01

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310-200-500 I1
310-200-500     Switched Services Networks Using Central Office Switching Machines - Transmission Testing Methods in 4-Wire No. 5 Crossbar Offices      1       1963-11-01

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310-200-501 I1
310-200-501     Switched Services Networks Using Central Office Switching Machines - Transmission Testing Methods in 2-Wire No. 5 Crossbar Offices      1       1963-11-01

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310-200-502 I1
310-200-502     Switched Services Networks Using Central Office Switching Machines - Transmission Testing Methods at PBXs                           1       1963-11-01

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310-200-503 I1
310-200-503     Switched Services Networks Using Central Office Switching Machines - Transmission Testing Methods at Subscriber Stations                1       1963-11-01

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310-200-503 I2
310-200-503     Switched Services Networks Using Central Office Switching Machines - Transmission Testing Methods at Subscriber Stations                2       1964-12-01

pdf 310-200-550 I1 Popular

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310-200-550 I1
310-200-550     Switched Services Networks Using Central Office Switching Machines - Balance Testing Methods in 2-Wire No. 5 Crossbar Offices           1       1963-12-01

pdf 310-201-100 I1 Popular

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pdf 310-280-100 I2 Popular

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310-280-100_I2.pdf

310-280-100 I2
310-280-100     19A Testboard - General Description                    2       1966-03-01

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310-280-300 I1
310-280-300     19A Testboard - Measurement and Adjustment of Pads for the Transmission Measuring Circuit                        1       1963-08-01

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310-280-500_I2.pdf

310-280-500 I2
310-280-500     19A Testboard - Measurement of Office Losses at 1 kc - Relative Envelope Delay and Frequency Response Measurements                   2       1966-03-01

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