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www.ChineseStandard.net Database: 189759 (19 Oct 2025)
Industry Standard: YD, YD/T, YDT
         
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Std ID Description (Standard Title) Detail
YD/T 612-1993 Reliability index and test method of facsimile communication equipment YD/T 612-1993
YD/T 613-1993 Technical requirement for networking of domestic satellite communication TDM/QPSK/FDMA (2Mbit/s) systems YD/T 613-1993
YD/T 614-1993 Technical conditions of telephone network number inquiry system YD/T 614-1993
YD/T 615-1993 Technical conditions of telephone network number inquiry system YD/T 615-1993
YD/T 616-1993 (2048, 8448, 34368, 139264kbit/s digital transmission tester technical conditions) YD/T 616-1993
YD/T 617-1993 Technical conditions of PCM voice channel characteristics testers YD/T 617-1993
YD/T 618-1993 (139264kbii/s BER tester technical conditions) YD/T 618-1993
YD/T 619-1993 (34368kbit/s BER tester technical conditions) YD/T 619-1993
YD/T 620-1998 Technical conditions of 2048kbit/s, 8448kbit/s, 34368kbit/s and 139264kbit/s transmission analyzers YD/T 620-1998
YD/T 621-1993 Technical conditions of 2048kbit/s, 8448kbit/s, 34368kbit/s and 139264kbit/s transmission analyzers YD/T 621-1993
YD/T 622-1993 (34368 kbit/s BER analyzer technical conditions) YD/T 622-1993
YD/T 623-1993 (139264kbit/s BER analyzer technical conditions) YD/T 623-1993
YD/T 624-1993 Test method of electronic teleprinters YD/T 624-1993
YD/T 625-1993 Technical conditions of psophometer (noise meter) YD/T 625-1993
YD/T 626-1993 Technical requirement and test method of Chinese teleprinters YD/T 626-1993
YD/T 627-1993 Parameters of digital exchange digital relay interfaces (2048kbit/s) and transmission characteristics between digital relay interfaces as well as their test methods YD/T 627-1993
YD/T 627-2012 Parameters, transmission characteristics and test methods of the digital relay interface (2048kbit/s) for digital switch YD/T 627-2012
YD/T 628-1993 Test method for call handle capacity of digital exchange (Busy hour call attempt) YD/T 628-1993
YD/T 629.1-1993 Monitoring method of attenuation changes in optical fiber transmission Transmission power monitoring method YD/T 629.1-1993
YD/T 629.2-1993 Monitoring method of attenuation changes in optical fiber transmission Backscatter monitoring method YD/T 629.2-1993
YD/T 630-1993 (Copper polyolefin insulated aluminum sheathed local communication cable into the network requirements) YD/T 630-1993
YD/T 631-1993 Technical requirement and test method of 2/34Mbit/s aggregate number-jump digital multiplex equipment YD/T 631-1993
YD/T 632-1993 (Mailbag) YD/T 632-1993
YD/T 633-1993 IF modem equipment operating at 34Mbit/s YD/T 633-1993
YD/T 634-1993 IF modem equipment operating at 8Mbit/s YD/T 634-1993
YD/T 635-1993 Inspection and test methods of telegraph terminal equipment YD/T 635-1993
YD/T 636-1993 (Teletypewriter packaging) YD/T 636-1993
YD/T 637-1993 (Communication with the DC - DC conversion equipment) YD/T 637-1993
YD/T 637-2006 DC-DC Conversion Equipment for Telecommunication YD/T 637-2006
YD/T 638.10-1993 Type designation for radio, microwave and satellite communication equipments YD/T 638.10-1993
YD/T 638.11-1993 Type designation for digital communication equipment YD/T 638.11-1993
YD/T 638.1-1993 Type designation for products of posts and telecommunications industry General rules YD/T 638.1-1993
YD/T 638.12-1993 Type designation for communications measuring instruments YD/T 638.12-1993
YD/T 638.13-1993 Type designation for accessory equipments of telephone exchange YD/T 638.13-1993
YD/T 638.14-1993 Type designation system for telephone sets YD/T 638.14-1993
YD/T 638.15-1994 Type designation for data communication equipment YD/T 638.15-1994
YD/T 638.2-1993 Type designation system for optical communication equipment YD/T 638.2-1993
YD/T 638.3-1993 (Communication power supply equipment type designation) YD/T 638.3-1993
YD/T 638.3-1998 The naming rule of types of telecommunication power supply YD/T 638.3-1998
YD/T 638.4-1993 (Postal equipment type designation) YD/T 638.4-1993
YD/T 638.5-1993 Type designation system for telephone switchboards YD/T 638.5-1993
YD/T 638.6-1993 Type designation for telegraph communication equipment YD/T 638.6-1993
YD/T 638.7-1993 Type designation for carrier communication equipment YD/T 638.7-1993
YD/T 638.8-1993 Type designation for facsimile communication equipments and automated office equipment YD/T 638.8-1993
YD/T 638.9-1993 (Pouch type designation) YD/T 638.9-1993
YD/T 639-1993 Management method of type designation for products in posts and telecommunications industry YD/T 639-1993
YD/T 640-1993 Technical requirement and test method of RF connectors for communication equipment YD/T 640-1993
YD/T 640-2012 General requirements and test methods for radio-frequency connectors of telecommunication equipment YD/T 640-2012
YD/T 641-1993 Technical requirement and test method of LF connectors for communication equipment YD/T 641-1993
YD/T 641-2012 General requirements and test methods for low frequency connectors of telecommunication equipment YD/T 641-2012
YD/T 642-1993 Reliability indicator and test method of carrier communication equipment YD/T 642-1993
YD/T 643-1993 Sophisticated method of electronic components (disks) YD/T 643-1993
YD/T 644-1993 Sophisticated method of complete communication equipment YD/T 644-1993
YD/T 645-1994 Outdoor optical cables for communication Criteria for quality grading YD/T 645-1994
YD/T 646-1994 Long-haul terrestrial analog radio relay system Quality grading criteria of color TV modulation and demodulation equipment (one TV + one accompanying sound program) YD/T 646-1994
YD/T 647-1994 Quality grading criteria of HF and LF noise testers YD/T 647-1994
YD/T 648-1994 Quality grading criteria of 620kHz balanced-type variable attenuator YD/T 648-1994
YD/T 649-1994 Quality grading criteria of 620kHz selection level meter YD/T 649-1994
YD/T 650-1994 Quality grading criteria of 620kHz level oscillator YD/T 650-1994
YD/T 651-1994 Quality grading criteria of PCM voice channel characteristics testers YD/T 651-1994
YD/T 652-1994 Quality grading criteria of 2048, 8448 kbit/s error code tester YD/T 652-1994
YD/T 653-1994 Quality grading criteria of IF modem equipment operating at 34Mbit/s YD/T 653-1994
YD/T 654-1994 Quality grading criteria of optical repeater operating at 34368kbit/s YD/T 654-1994
YD/T 655-1994 Optical transmitter and receiver operating at 34368kbit/s Criteria for quality grading YD/T 655-1994
YD/T 656-1994 Optical transmitter and receiver operating at 8448kbit/s Criteria for quality grading YD/T 656-1994
YD/T 657-1994 Optical transmitter and receiver operating at 139264kbit/s Criteria for quality grading YD/T 657-1994
YD/T 658-1994 Quality grading criteria of IF modem equipment operating at 140Mbit/s YD/T 658-1994
YD/T 659-1994 Quality grading criteria of VHF digital communication equipment YD/T 659-1994
YD/T 660-1994 Quality grading criteria of VHF analog communication equipment YD/T 660-1994
YD/T 661-1994 (Laser imagesetter quality grading standards) YD/T 661-1994
YD/T 662-1994 Quality grading criteria of IF modem equipment operating at 8Mbit/s YD/T 662-1994
YD/T 663-1994 Quality grading criteria of IF modem equipment operating at 2×34Mbit/s YD/T 663-1994
YD/T 664-1994 Quality grading criteria of 2GHz digital microwave transceiver YD/T 664-1994
YD/T 665-1994 Quality grading criteria of 4GHz digital microwave transceiver YD/T 665-1994
YD/T 666-1994 Quality grading criteria of 6GHz digital microwave transceiver YD/T 666-1994
YD/T 667-1994 Quality grading criteria of 7GHz digital microwave transceiver YD/T 667-1994
YD/T 668-1994 Quality grading criteria of 8GHz digital microwave transceiver YD/T 668-1994
YD/T 669-1994 Quality grading criteria of 2048 kbit/s 30-channel PCM multiplex equipment YD/T 669-1994
YD/T 670-1994 Quality grading criteria of microwave tower YD/T 670-1994
YD/T 671-1994 Quality grading criteria of second order digital multiplex equipment operating at 8448 kbit/s and using positive justification YD/T 671-1994
YD/T 672-1994 Quality grading criteria of 2/34Mbit/s aggregate number-jump digital multiplex equipment YD/T 672-1994
YD/T 673-1994 Quality grading criteria of third order digital multiplex equipment operating at 34368 kbit/s and using positive justification YD/T 673-1994
YD/T 674-1994 Quality grading criteria of fourth order digital multiplex equipment operating at 139264 kbit/s and using positive justification YD/T 674-1994
YD/T 675-1994 Quality grading criteria of digital SPC private branch exchanger YD/T 675-1994
YD/T 676-1994 Quality grading criteria of space-division SPC private branch exchanger YD/T 676-1994
YD/T 677-1994 Quality grading criteria of Alphabetic and Chinese-character teleprinters YD/T 677-1994
YD/T 678-1994 Quality grading criteria of electronic teleprinters YD/T 678-1994
YD/T 679-1994 Quality grading criteria of PBC electromechanical subscriber line concentrator YD/T 679-1994
YD/T 680-1994 Quality grading criteria of inverter equipment for communication YD/T 680-1994
YD/T 681-1994 Quality grading criteria of inverter equipment for communication YD/T 681-1994
YD/T 682-1994 Quality grading criteria of semiconductor rectifier installations for communication YD/T 682-1994
YD/T 683-1994 Quality grading criteria of power distribution equipment for communication YD/T 683-1994
YD/T 684-1994 Quality grading criteria of parabolic antenna for microwave relay communication system YD/T 684-1994
YD/T 685-1994 Quality grading criteria of four-way accompanying sound modem equipment for color TV analog terrestrial microwave relay system YD/T 685-1994
YD/T 686-1994 Quality grading criteria of automatic telephone sets YD/T 686-1994
YD/T 687-1994 Quality grading criteria of space-division SPC telephone exchanges YD/T 687-1994
YD/T 688-1994 Quality grading criteria of digital SPC telephone exchanges YD/T 688-1994
YD/T 689-1994 Quality grading criteria of rural and urban local subscriber loop carrier equipment YD/T 689-1994
YD/T 690-1994 Quality grading criteria of rural and urban local subscriber loop carrier equipment YD/T 690-1994
YD/T 691-1994 Quality grading criteria of automatic message switching equipment YD/T 691-1994