YDJ 20-1988
Interim technical regulations for installation and design of program-controlled telephone switching equipment (English Version)
- Standard No.
- YDJ 20-1988
- Language
- Chinese, Available in English version
- Release Date
- 1988
- Published By
- Professional Standard - Post and Telecommunication
- Latest
- YDJ 20-1988
YDJ 20-1988 history
- 1988 YDJ 20-1988 Interim technical regulations for installation and design of program-controlled telephone switching equipment
