GOST 18145-1981 Circuits at the interface C2 of the data transmission equipment with the terminals in the consequent data input-output. Nomenclature and technical requirements*, 1981-12-22 Update
GOST 23675-1979 Interface circuits C2 of data transmission system. Electric parameters
GOST 25007-1981 Data transmission interface with communication channel transmission frequency separation system. Basic parameters at the interface*, 1981-12-22 Update
GOST 26557-1985 Data transmission signals entering in the communication channels. Energetic parameters*, 1985-12-22 Update
GOST 27232-1987 Interface of data transmission with physical lines. Basic parameters*, 1987-12-22 Update
GOST 24174-1980 history
1980GOST 24174-1980 Signal-conversion equipment /SCE/ for primary wideband channels. Types and basic parameters