YD/T 521-1992 English PDF

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YD/T 521-1992: Test method of digital exchange analog interfaces and test method of transmission characteristics between (2-wire or 4-wire) analog interfaces

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
YD/T 521-1992	909	Add to Cart	5 days	Test method of digital exchange analog interfaces and test method of transmission characteristics between (2-wire or 4-wire) analog interfaces

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Basic data

Standard ID: YD/T 521-1992 (YD/T521-1992)
Description (Translated English): Test method of digital exchange analog interfaces and test method of transmission characteristics between (2-wire or 4-wire) analog interfaces
Sector / Industry: Telecommunication Industry Standard (Recommended)
Classification of Chinese Standard: M15
Word Count Estimation: 26,269
Date of Issue: 1/25/1992
Date of Implementation: 10/1/1992
Summary: This standard specifies the method for digital switch between analog ground door-wire analog interface test methods and sometimes four-wire transmission characteristics of the test. This standard applies to digital switch identification, acceptance and maintenance testing.

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