译：GB/T 11324-1995 Performance and test methods of the fourth order digital multiplex equipment operating at 139264 kbit/s and using positive justification

译：GB/T 7254-1995 Performance and test methods of the second order digital multiplex equipment operating at 8448 kbit/s and using positive justification

译：YD/T 673-1994 34368kbit/s for the quality classification standard of three-level digital multiplexing equipment for adjusting the bit rate

译：YD/T 672-1994 "Quality standard for interleave digital multiplexing equipment at 2/34 kbit/s"

译：YD/T 671-1994 8448kbit/s for digital multiplexing equipment quality classification standards for secondary groups

译：YD/T 674-1994 139264kbit/s positive code rate adjustment four-level digital multiplexing equipment quality classification standard

译：GB/T 14760-1993 The measurement methods of transmission performances on optical fiber cable communication systems

译：GB/T 14133-1993 The transmission performance objectives for mixed analogue-digital public telephone automatic switching network

译：GB/T 13998-1992 Measuring methods of the magnetic induced longitudinal EMF, magnetic induced voltage with respect to earth, electric induced current and psophometric voltage on telecommunication lines

译：GB/T 5443-1985 The test methods for the technical specifications of ringing and tone for automatic telephone switching network

译：GB/T 5444-1985 The test methods for the technical specifications of subscriber line signalling for automatic telephone switching network

译：GB/T 5442-1985 The test methods for the technical specifications of inband pulsing single frequency line signalling system for automatic telephone switching network

译：GB/T 4575-1984 Frequency comparison pilot series for the FDM systems in the toll communication network

译：GB/T 4574-1984 Measuring methods for actual circuit noise and the circuit noise in simulating system loading over the analogue communication network