YD/T 638.5-1993
Type designation system for telephone switchboards (English Version)
- Standard No.
- YD/T 638.5-1993
- Language
- Chinese, Available in English version
- Release Date
- 1993
- Published By
- Professional Standard - Post and Telecommunication
- Latest
- YD/T 638.5-1993
- Scope
- This standard specifies the model naming method for telephone exchanges. This standard applies to the model naming of telephone exchanges.
YD/T 638.5-1993 history
- 1993 YD/T 638.5-1993 Type designation system for telephone switchboards
