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YD 344-1990

Chinese Standard: 'YD 344-1990'
Standard IDContents [version]USDSTEP2[PDF] delivered inStandard Title (Description)StatusRelated Standard
YD 344-1990English1219 Add to Cart Days<=6 [YD/T 344-1990] Requirements for PABXs access to public telephone switching network Valid YD 344-1990

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Detail Information of YD 344-1990; YD344-1990
Description (Translated English): Requirements for PABXs access to public telephone switching network
Sector / Industry: Telecommunication Industry Standard
Word Count Estimation: 38,000
Date of Issue: 10/5/1990
Date of Implementation: 1/8/1990
Drafting Organization: Institute of Ministry of Posts and Telecommunications Transmission
Summary: This standard provides a variety of analog and digital subscriber switch, when access to the public telephone network, must be unified to follow the main electrical performance and reliability requirements. This standard applies to all types of automatic switch and the public telephone network users analog or digital program-controlled switching system interface to connect different network access relay purposes.

Related standard:   YDN 112-1999  YDN 113-1999
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