 |
| |||
| compelled multifrequency signaling; multi-frequency compelled signaling; multifrequency compelled signaling | |||
| 多 频互控信令: 3 phrases in 1 subject |
| Telecommunications | 3 |
The server is undergoing maintenance and the site is working in read-only mode. Please check back later.">Add | The server is undergoing maintenance and the site is working in read-only mode. Please check back later.">Report an error
| Get short URL | Language Selection Tips