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YD 344-1990 English PDF

US$1519.00 ยท In stock
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YD 344-1990: [YD/T 344-1990] Requirements for PABXs access to public telephone switching network
Status: Obsolete
Standard IDContents [version]USDSTEP2[PDF] delivered inStandard Title (Description)StatusPDF
YD 344-1990English1519 Add to Cart 6 days [Need to translate] [YD/T 344-1990] Requirements for PABXs access to public telephone switching network Obsolete YD 344-1990

PDF similar to YD 344-1990


Standard similar to YD 344-1990

GB/T 41301   YD/T 1730   YD/T 1548.1   YD/T 4652   YD/T 4653   YD/T 4922   

Basic data

Standard ID YD 344-1990 (YD344-1990)
Description (Translated English) [YD/T 344-1990] Requirements for PABXs access to public telephone switching network
Sector / Industry Telecommunication Industry Standard
Classification of Chinese Standard M11
Word Count Estimation 38,341
Date of Issue 5/10/1990
Date of Implementation 8/1/1990
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.

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