GB/T 12171-1990
TDM/FDM 60路复用转换设备进网要求
Specification for TDM/FDM 60-channeltransmultiplexing equipments used in the telecommunication network
- 实施日期
- 1990-08-01
- ICS 分类
- 33.040.40
组合使用关键词、标准类型、状态与 ICS 分类,快速定位所需国家标准。
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GB/T 12171-1990
Specification for TDM/FDM 60-channeltransmultiplexing equipments used in the telecommunication network
GB 12048-1989
Requirements for clock and synchronization equipment used in the digital network
GB/T 11594-1989
List of definitions for interchange circuits between data terminal equipment (DTE) and data circuit-terminating equipment (DCE) on public data networks
GB/T 11592-1989
Interface between data terminal equipment (DTE) and data circuit-terminating equipment (DCE) for start stop transmission services on public data networks
GB/T 11015-1989
Interface between data terminal equipment and automatic calling equipment for data communication
GB/T 11014-1989
Electrical characteristics of balanced voltage digital interface circuits
GB/T 9541-1988
2400 bits per second duplex modem using the echo cancellation technique standardized for use on the general switched telephone network and on point-to-point 2 wire leased telephone-type-circuits
GB/T 9409-1988
Specifications for colour TV demodulation equipment (1 TV+1 sound program) used in long-haul terres-trial analog radio-relay systems
GB/T 9408-1988
Specifications for colour TV modulation equipment (1 TV+1 sound program) used in long-haul terres-trial analog radio-relay systems
GB/T 7619-1987
Electrical characteristics for balanced double-current interchange circuits for general use with integrated circuit equipment in the field of datacommunications
GB/T 7618-1987
Electrical characteristics for unbalanced double-current interchange circuits for general use with inte-grated circuit equipment in the field of data communications
GB/T 7585-1987
Capacity series and radio-frequency channel arrangement for analog microwave relay systems
GB/T 7554-1987
Protected 5-unit numerical code for telegram service
GB/T 7436-1987
Specifications of TDM equipment operating on an analog telephone-type circuit for telegraph and lower-speed data
GB/T 7438-1987
Numbering for telex and low speed data in national communication network
GB 6830-1986
The tolerable limits of danger ontelecommunication lines from power lines
GB/T 5444-1985
The test methods for the technical specifications of subscriber line signalling for automatic telephone switching network
GB/T 5443-1985
The test methods for the technical specifications of ringing and tone for automatic telephone switchingnetwork
GB/T 5442-1985
The test methods for the technical specifications of inband pulsing single frequency line signalling system for automatic telephone switching network
GB/T 5438-1985
Characteristics and measuring methods for monophonic and stereophonic transmissions