各位HAM在日常使用模拟对讲机直频或中继通联前非常想知道是否有他人也在同一频道上，每次通联前需要语音呼叫费时费嗓子，如果有类似于计算机网络中的PING命令就好了，因此本人提出一种极简PING流程请各位指教。
Most of the simulated radios have the ability to transmit DTMF (Dual-Tone Multi-Frequency) signals. Previously, these were mainly used for making single calls or group calls with pre-set IDs, or for remotely turning off devices. However, in practice, they are rarely used.
Process: 1. The calling party sends a sequence of DTMF signals (at least 10) on the channel.
2. The other party intending to respond should also send a sequence of DTMF signals (recommended with at least 10).
3. The calling party should again transmit a series of DTMF signals on the channel (at least 10).
4. The other party, upon receiving the intended response, also randomly sends a sequence of DTMF signals (recommended to be at least 10) to demonstrate that both parties are correctly interpreting each other's signals.
5. Once the calling party receives the call, they can initiate either a voice or text communication.
The well-known methods for voice communication using simulated walkie-talkies are widely known.
Please search for "The Ultimate Tool for Simulated Radio Text Communication: Rattlegram" on this website to learn about the method.
BI3BJU
闽ICP备2021006864号-7
闽公网安备35020602002794号
互联网举报中心