YD/T 744-2009
Technical requirements and test methods for digital microwave telecommunication equipments (systems) of plesiochronous digital hierarchy (PDH) (English Version)

Standard No.

YD/T 744-2009

Language

Chinese, Available in English version

Release Date

2009

Published By

Professional Standard - Post and Telecommunication

Latest

YD/T 744-2009

Replace

YD/T 744-1995 YD/T 745-1995 YD/T 792-1995 YD/T 830-1996 YD/T 843-1996

Scope

This standard specifies the technical requirements and test methods for quasi-synchronous digital series (PDH) digital microwave communication equipment and systems, including assumed reference connections, channels and digital segments, errors for quasi-synchronous digital series (PDH) digital microwave communication equipment and systems Technical requirements and test methods for performance, frequency band, channel arrangement, capacity series, availability indicators, radio frequency (RF) interface characteristics and baseband interface characteristics, taking into account other services, protection switching, system performance, network management, power supply, environmental adaptability, safety and other requirements. This standard applies to quasi-synchronous digital series (PDH) digital microwave communication equipment and systems.

YD/T 744-2009 Referenced Document

• GB 191 Packaging--Pictorial marking for handling of goods
• GB 3873 General technical requirements for product packaging of communication equipment
• GB 4943 Safety of information technology equipment
• GB/T 2423.1 Environmental testing for electric and electronic products.Part 2:Test methods.Tests A:Cold
• GB/T 2423.2 Environmental testing for electric and electronic products.Part 2:Test methods.Tests B:Dry heat
• GB/T 2423.3 Environmental testing—Part 2：Testing method—Test Cab:Damp heat,steady state*， 2016-12-13 Update
• GB/T 7611-2001 Characteristics of the electrical interface at hierarchical bit rate for digital network
• ITU-R F.1191 Necessary and occupied bandwidths and unwanted emissions of digital fixed service systems*， 2011-05-01 Update
• ITU-R F.1496 Radio-frequency channel arrangements for fixed wireless systems operating in the band 51.4-52.6 GHz
• ITU-R F.1497 Radio-frequency channel arrangements for fixed wireless systems operating in the band 55.78-66 GHz*， 2014-02-01 Update
• ITU-R F.1520 Radio-frequency arrangements for systems in the fixed service operating in the band 31.8-33.4 GHz*， 2011-04-01 Update
• ITU-R F.746 Radio-frequency arrangements for fixed service systems
• ITU-R F.748 Radio-Frequency Arrangements for Systems of the Fixed Service Operating in the 25 26 and 28 GHz Bands
• YD/T 1077-2000 Access Network Technical Specification.Narrowband Passive Optical Network(PON)
• YD/T 1098-2001 Test Specification for Low.End Router
• YD/T 1136-2001 Technical requirements and testing methods of basic access terminal adapter (TA) of integrated sevices digital network (ISDN)

YD/T 744-2009 history

• 2009 YD/T 744-2009 Technical requirements and test methods for digital microwave telecommunication equipments (systems) of plesiochronous digital hierarchy (PDH)
• 1995 YD/T 744-1995 Technical requirement and test method for mid-capacity digital microwave relay communication system at 34Mbit/s

YD/T 744-2009 Technical requirements and test methods for digital microwave telecommunication equipments (systems) of plesiochronous digital hierarchy (PDH) has been changed from YD/T 745-1995 Technical requirement and test method for large-capacity digital microwave relay communication system at 6GHz140Mbit/s.

YD/T 744-2009 Technical requirements and test methods for digital microwave telecommunication equipments (systems) of plesiochronous digital hierarchy (PDH) has been changed from YD/T 792-1995 Technical requirement and measuring method for networking of 8GHz small-capacity digital microwave communication equipment.

YD/T 744-2009 Technical requirements and test methods for digital microwave telecommunication equipments (systems) of plesiochronous digital hierarchy (PDH) has been changed from YD/T 830-1996 Technical requirement and measuring method for 2×34Mbit/s digital microwave relay communication system.

YD/T 744-2009 Technical requirements and test methods for digital microwave telecommunication equipments (systems) of plesiochronous digital hierarchy (PDH) has been changed from YD/T 843-1996 Technical requirement and measuring method of Ku-band small-capacity digital microwave relay communication system.