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Database: 189760 (18 Oct 2025)
TB/T 1690-1993 English PDF
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TB/T 1690-1993
: Railway Telephone Switching Network - Digital Line Singaling
TB/T 1690: Evolution and historical versions
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Standard Title (Description)
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TB/T 1690-1993
English
489
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Railway Telephone Switching Network - Digital Line Singaling
TB/T 1690-1993
TB 1690-1985
English
RFQ
ASK
3 days [Need to translate]
(Chinese Industry Standard)
Obsolete
TB 1690-1985
PDF similar to TB/T 1690-1993
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Basic data
Standard ID
TB/T 1690-1993 (TB/T1690-1993)
Description (Translated English)
Railway Telephone Switching Network - Digital Line Singaling
Sector / Industry
Railway & Train Industry Standard (Recommended)
Classification of Chinese Standard
S71
Word Count Estimation
14,127
Date of Issue
4/22/1993
Date of Implementation
10/1/1993
Older Standard (superseded by this standard)
TB 1690-1985
Summary
This standard specifies the coded meaning railroad switched telephone network digital line signal, the signal encoding and signal equipment related technical instruction. This standard applies to railroad between circuit switched telephone network by using the 30/32 channel PCM system slot 16 (TS16) signaling transmission line signal.