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| Standard Insuued on: 1990-05 |
YD 344-1990 Requirements for PABXs access to public telephone switching network
自动用户交换机进网要求
| Category No.: | YD | Valid Status: | valid |
| Issued Organization: | Ministry of Posts and Telecommunications | Issued Date: | 1990-05-10 |
| Implemented Date: | 1990-8-1 | Abolished Date: | |
| Superseded Standard.: | Superseded Date: |
GB/T 12347-1996
GBJ 321-1990
GBJ 39-1990
GBJ 128-1990
GBJ 133-1990
GBJ 25-1990
GBJ 130-1990
GB/T 12356-1990
GB/T 12355-1990
GB 4333.10-1990
GB 12349-1990
GB 12348-1990
GB/T 1786-1990
CJJ 36-1990
JJG 2060-1990
YD 344-1990
HAD 101/09-1990
JJG(YD) 001-1989
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