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TB/T 3026.4-2002The digital conference telephone handset distributor technical requirements and test methods (English PDF)

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Issued by

National Railway Administration

Level / Type

National · Recommended

Issue date

February 9, 2002

Implementation date

July 1, 2002

Scope

TB/T 3026.4-2002 (The digital conference telephone handset distributor technical requirements and test methods) is available as an English-translated PDF.

TB/T 3026.4-2002 is the Chinese standard "The digital conference telephone handset distributor technical requirements and test methods". This standard specifies the digital conference telephone handset distributor technical requirements and test methods.

This standard applies to digital conference phone mic splitter design, production and testing, but also for scientific research and engineering design. Issued on 2002-02-09, in force from 2002-07-01.

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Document preview — TB/T 3026.4-2002

National Standard of the People's Republic of China

Classification: M40

[Preview only]
1 Scope
2 Normative references
3 Terms and definitions
3.1 General requirements
3.2 Designation
4 Technical requirements
4.2 Material Requirements
5 Inspection methods
5.1 Appearance and Dimension Inspection
6 Inspection rules
7 Marking, packaging, transportation and storage

1 Foreword

TB/T 3026.4-2002 was issued by National Railway Administration on 9 February 2002 and has been in force since 1 July 2002.

It is one of 6 parts of the TB/T 3026 series.

The TB/T prefix marks a recommended standard. It is not law in itself: it becomes binding when a contract names it, when a regulation or a mandatory standard refers to it, or when a producer declares conformity with it.

2 Scope Preview

This standard specifies the digital conference telephone handset distributor technical requirements and test methods. This standard applies to digital conference phone mic splitter design, production and testing, but also for scientific research and engineering design.

TB/T 3026.4-2002 is filed under Chinese Standard Classification M40, in the field of telecommunications and broadcasting.

This catalogue holds 1,254 other TB/T standards without an ICS number.

In this catalogue, TB/T standards carry edition years from 1973 to 2026.

3 About this standard

Sector: Railway & Train Industry Standard (Recommended)

Issued by: National Railway Administration

English translation: about 8 pages (approximate)

Chinese original: about 7,749 characters

4 Related standards

Other parts of this standard:

TB/T 3026.1-2002 — Digital conference phone the Tandem equipment technical requirements and test methods

TB/T 3026.2-2002 — Digital conference phone control terminal technical requirements

TB/T 3026.3-2002 — Digital conference phone the President control panel technical requirements

TB/T 3026.5-2002 — Digital conference phone extension technical requirements and test methods

TB/T 3026.6-2002 — Digital conference phone test conversion box technical requirements and test methods

Standards on related subjects:

YD/T 993-2016 — The technical requirements and test methods of overvoltage and overcurrent resistibility for wire telecommunication terminal equipment

YD/T 868-2007 — Technical requirements and measuring methods for additional equipment of telephone set

GB/T 15279-2002 — The specifications of automatic telephone set

5 Classification and status

Chinese Standard Classification (CCS): M 40

Prefix TB/T: recommended standard.

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 8 pages — is available in the English PDF.

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