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SJ 3178-1988 English PDF

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SJ 3178-1988: Technical requirements for iron clad crossbar subscribers telephone switchboards
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SJ 3178-1988English199 Add to Cart 2 days [Need to translate] Technical requirements for iron clad crossbar subscribers telephone switchboards   SJ 3178-1988

PDF similar to SJ 3178-1988


Standard similar to SJ 3178-1988

YD/T 993   YD/T 868   GB/T 15279   

Basic data

Standard ID SJ 3178-1988 (SJ3178-1988)
Description (Translated English) Technical requirements for iron clad crossbar subscribers telephone switchboards
Sector / Industry Electronics Industry Standard
Classification of Chinese Standard M40
Word Count Estimation 4,499
Date of Issue 4/7/1988
Date of Implementation 10/1/1988
Summary This standard applies to mining crossbar PBXes. Mine crossbar PBXes (hereinafter referred to as switch) applicable large, medium and small mines for production scheduling and surface and underground users to internal communication, and with a relay device that automatically Bureau and the city, the magnet office, total electricity bureau switches and other household call rejection.

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