 |
| |||
| multi-frequency signalling; DTMF signaling | |||
| MF signaling; MF signalling; dual-tone multifrequency signaling; multifrequency signaling; multifrequency signalling | |||
|
signalisation multifrequence : 23 短语, 4 学科 |
| 一般 | 2 |
| 信息技术 | 3 |
| 电信 | 2 |
| 电子产品 | 16 |
|
| |||
| multi-frequency signalling; DTMF signaling | |||
| MF signaling; MF signalling; dual-tone multifrequency signaling; multifrequency signaling; multifrequency signalling | |||
|
signalisation multifrequence : 23 短语, 4 学科 |
| 一般 | 2 |
| 信息技术 | 3 |
| 电信 | 2 |
| 电子产品 | 16 |