电话信道 meaning in Chinese
phone cha el
speech channel
telephone channel
Examples
- Power system protective relay applications of audio tones over voice grade channels
电话信道上可听音音调的电源系统保护继电器应用指南 - Guide for power system protective relay applications of audio tones over telephone channels
电话信道上可听音电源系统保护继电器应用指南