Protection circuits from dangerous voltages and currents arising at lines of wire broadcasting. General requirements and rules
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Unit automated communication system. Common requirements of subscriber units for interaction with AT-50 and ПД-200 networks
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Unit automated communication system. Common requirements of interaction signals on subscriber link of AT-50 and ПД-200 networks
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Facsimile information, applied to the acoustic frequency channels. Energy parameters and measurement methods
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Control signals, line and acoustic signals of the single frequency signalling system for the trunk and intrazone telephone network. Electrical parameters and measuring methods
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Interfaces of digital-transmission channels and group-highways in the basic network
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Digital multiplex signal from structure of united automatic communication network in the basic network. Requirements and limits
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Grounds for stationary telegraph and telephone installations, wire-broadcasting distribution points, radio-relay stations and CATV antennas. Resistance norms
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Line communication sets. Protection circuits from dangerous voltages and currents arisen at lines. Specifications
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Integrated services digital network. Common channel signalling. General technical requirements
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Optical fibres. General specifications
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Electrical installation of communications electronic equipment by means of solder-free methods. General technical requirements.
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