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YD 344-1990 English PDF

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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


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 38,310
Date of Issue 1990/5/10
Date of Implementation 1990/8/1
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.

Similar standards: YDN 112-1999  YDN 113-1999  YD/T 3888.5-2023  
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