YD/T 1285-2003The test method for quality of communication for inter-public telecom network. Call complete ratio and post-dialing delay for telephone call (English PDF)
公用电信网间通信质量测试方法——电话呼叫的接通率和拨号后时延
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Issued by
Ministry of Industry and Information Technology
Level / Type
National · Recommended
Issue date
August 12, 2003
Implementation date
August 12, 2003
Scope
YD/T 1285-2003 is the English-translated version of 公用电信网间通信质量测试方法——电话呼叫的接通率和拨号后时延.
YD/T 1285-2003 is the Chinese standard "The test method for quality of communication for inter-public telecom network. Call complete ratio and post-dialing delay for telephone call".
This standard specifies the interconnection and interworking communication quality after dialing delay in the completion rate indicator testing methods, and telecommunications management sector indicators when assessing interoperability testing methods.
This standard applies to interconnection management department of the operators call connection quality indicator evaluation and testing, but also as operators measure the quality of service interoperability technical basis. Issued on 2003-08-12, in force from 2003-08-12.
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Document preview — YD/T 1285-2003
National Standard of the People's Republic of China
- ICS
- 33.040
- Classification
- M10
Contents
- [Preview only]
- 1 Scope
- 2 Normative references
- 3 Abbreviations
- 3.1 Terms and definitions
- 4 General
- 4.1 Test environment
- 4.2 UE Information
- 4.3 Test Implementation
- 5 Technical requirements
1 Foreword
YD/T 1285-2003 was issued by Ministry of Industry and Information Technology on 12 August 2003 and took effect the same day.
The YD/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.
The document runs to 20 pages in English translation.
2 Scope Preview
This standard specifies the interconnection and interworking communication quality after dialing delay in the completion rate indicator testing methods, and telecommunications management sector indicators when assessing interoperability testing methods. This standard applies to interconnection management department of the operators call connection quality indicator evaluation and testing, but also as operators measure the quality of service interoperability technical basis.
YD/T 1285-2003 falls under ICS 33.040, in the field of telecommunications.
This catalogue holds 3,420 other YD/T standards in that field.
In this catalogue, YD/T standards carry edition years from 1982 to 2026.
3 About this standard
Sector: Telecommunication Industry Standard (Recommended)
Issued by: Ministry of Industry and Information Technology
English translation: about 20 pages (approximate)
Chinese original: about 30,382 characters
4 Related standards
Standards on related subjects:
GB/T 47325-2026 — Security technical requirements and test methods for over-the-air updates in the internet of vehicles
GB/T 47324-2026 — Cybersecurity protection requirements for internet of vehicles platforms
YD/T 1730-2008 — Implementation Guide for Security Risk Assessment of Telecom Network and Internet
YD/T 6470-2025 — Technical requirements for DNS over HTTPS
YD/T 3802-2025 — Classification protection requirements for data security in telecom field
YD/T 2537-2025 — Service test method for number portability
5 Classification and status
International classification (ICS): 33.040
Chinese Standard Classification (CCS): M 10
Prefix YD/T: recommended standard.
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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 20 pages — is available in the English PDF.
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