33.040.50 Lines, connections and chains

Transmission lines of super high frequency. Terms and definitions

External circuits for start-stop apparatuses for alphabetic telegraphy, 5-element code. Types and basic parameters

Circuits of the interface C2 of the data transmission system. Requirements by temporary characteristics of signals by start-stop and synchronous transmissions

Loss meters of cable line. Types and basic parameters

External circuits for terminals document communication. Types and basic parameters

Data transmission equipment. Devices of transformation of signals for work through the channels of voice-frequency frequency. Types and key parameters.