TB/T 1689-1993 English PDF

US$219.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email.
TB/T 1689-1993: Railway Telephone Switching Network - Inband Pure Tone Pulse Line Singaling

TB/T 1689: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
TB/T 1689-1993	219	Add to Cart	3 days	Railway Telephone Switching Network - Inband Pure Tone Pulse Line Singaling
TB 1689-1985	RFQ	ASK	3 days	(Chinese Industry Standard)	Obsolete

Similar standards

TB/T 2834   TB/T 3324   TB/T 3478   TB/T 3477.2   

Basic data

Standard ID: TB/T 1689-1993 (TB/T1689-1993)
Description (Translated English): Railway Telephone Switching Network - Inband Pure Tone Pulse Line Singaling
Sector / Industry: Railway & Train Industry Standard (Recommended)
Classification of Chinese Standard: S71
Word Count Estimation: 6,648
Date of Issue: 4/22/1993
Date of Implementation: 10/1/1993
Older Standard (superseded by this standard): TB 1689-1985
Adopted Standard: CCITT, NEQ
Summary: This standard specifies the single-frequency pulse signal railway line band switched telephone network (hereinafter referred to as single-frequency signals) the type and role of signal transmission, signal structure, signal segmentation and related technical indicators. This standard applies to the use of the inter-frequency division or time division multiplexing circuit telephones.

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