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Database: 189760 (25 Oct 2025)
SJ 20040-1992 English PDF
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SJ 20040-1992
: Generic specification for 4800bit/s wire voice-band modems
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SJ 20040-1992
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Generic specification for 4800bit/s wire voice-band modems
SJ 20040-1992
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Standard similar to SJ 20040-1992
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Basic data
Standard ID
SJ 20040-1992 (SJ20040-1992)
Description (Translated English)
Generic specification for 4800bit/s wire voice-band modems
Sector / Industry
Electronics Industry Standard
Classification of Chinese Standard
M32
Word Count Estimation
21,269
Date of Issue
2/1/1992
Date of Implementation
5/1/1992
Summary
This standard specifies the technical requirements, test methods, inspection rules data signaling rate is 4800bit/s, then with various cable modem, signs, transportation, storage and other requirements. This standard applies to standardize with manual equalizer on a dedicated telephone-type circuits used 4800bit/s modem and automatic equalizer on a dedicated telephone-type circuits for use with standardized 4800/2400bit/s modem. As well as for use in the general switched telephone network with adaptive equalization standardized 4800/2400bit/s modem design, production, stereotypes, delivery inspection and routine testing.