GB/T 42724-2023Ships and marine technology - Navigation and ship operations - Guidelines for onboard telephone equipment (English PDF)
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Issued by
State Administration for Market Regulation, China National Standardization Administration
Level / Type
National · Recommended
Issue date
August 6, 2023
Implementation date
March 1, 2024
Scope
GB/T 42724-2023 (Ships and marine technology - Navigation and ship operations - Guidelines for onboard telephone equipment) is available as an English-translated PDF.
GB/T 42724-2023 — This document provides the communication quality, connection quality, and functionality, installation, performance and maintenance, as well as general and specific recommendations for related performance tests (factory tests and field tests) and maintenance tests. The scope of application of this document is shown in Table 1.This document does not apply to digital phones, Internet phones [LAN (VoIP)], and wireless phones. Table 1 Applicability of this document Connection Type Signal analog digital CableX - Wireless - - X. The type of phone this document applies to. -.Phone types this document does not apply to.
Document preview — GB/T 42724-2023
National Standard of the People's Republic of China
- ICS
- 47.020.70
- Classification
- U 66
Issued by: State Administration for Market Regulation, China National Standardization Administration
Contents
- 1 Scope1
- 2 Normative reference documents1
- 3 Terms and Definitions1
- 4 Overall characteristics2
- 4.1 General2
- 4.2 Automated calls3
- 4.3 Common type telephone3
- 4.4 Battery-free phones3
- 4.5 Sound Power Phone3
- 5 Call quality control4
- 5.1 General4
- 5.2 Measures to prevent vibration4
- 5.3 Noise suppression measures4
- 6 Data Suggestions---Autophone4
- 6.1 General4
- 6.2 Multifunction phone4
- 6.3 Analog Telephone4
- 6.4 Connecting with external communication devices5
- 7 Installation5
- 7.1 General5
- 7.2 Environment5
- 7.3 Explosion-proof6
- 7.4 Cabling6
- 8 Performance test6
- 8.1 General6
- 8.2 Factory test6
- 8.3 Field test9
Foreword
This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part 1.Structure and Drafting Rules of Standardization Documents"
Drafting.
This document is equivalent to ISO 21792.2019 "Guidelines for ship and marine technical navigation and ship operation marine telephone equipment".
Please note that some content in this document may be subject to patents. The publisher of this document assumes no responsibility for identifying patents.
1 Scope
This document provides the communication quality, connection quality, and
functionality, installation, performance and maintenance, as well as general and specific recommendations for related performance tests (factory tests and field tests) and maintenance tests.
The scope of application of this document is shown in Table 1.This document does not apply to digital phones, Internet phones [LAN (VoIP)], and wireless phones.
Table 1 Applicability of this document
Connection Type
Signal
analog digital
CableX -
Wireless - -
X. The type of phone this document applies to.
-.Phone types this document does not apply to.
2 Normative reference documents
This document has no normative references.
3 Terms and definitions
The following terms and definitions apply to this document.
3.1 Phone type
3.1.1
automatictelephoneautomatictelephone
Telephones managed by automatic telephone exchanges (3.3).
Note 1.Automatic telephones are divided into four categories according to their structural appearance. desktop, wall-mounted, embedded and portable.
Note 2.Automatic analog telephone calls are referred to as "automatic telephone calls" in this document.
3.1.2
A phone powered by DC power supply (DC24V).
Note 1.Common power telephones are divided into two categories. selective type and direct type according to their connectivity.
Note 2.Common electric telephones are divided into four categories according to their structural appearance. desktop, wall-mounted, embedded and portable.
3.1.3
battery-lesstelephonebattery-lesstelephone
It has a hand-cranked generator and a telephone for voice communication.
......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — all pages — is available in the English PDF.
Referenced standards
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