英文名称 : Performance and test methods of the 30 channels pulse code modulation multiplex equipment at 2048 kbit/s

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英文名称 : Specification and measuring method of frequency-modulated voice-frequency telegraph set for a modulation rate of 75 Bauds with channels spaced at 180 Hz

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英文名称 : Performance requirements for digital line systems on symmetric pair cables used in telecommunication network

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英文名称 : Performance requirements for digital line systems on coaxial pair cables used in telecommunication network

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英文名称 : Performance requirements for digital sections of metallic cables used in telecommunication network

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英文名称 : Technical requirements for TDM/FDM 60-channel transmultiplexing equipment

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英文名称 : Technical requirements for a 60-channel PCM/ADPCM transcoder equipment

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