6. 送(受)话器8芯插座4脚起什么作用?

6. 送(受)话器8芯插座4脚起什么作用?

["\u7b54\uff1a4\u811a\u6302\u673a\u4fe1\u53f7\uff08\u4f4e\u7535\u5e73\u6709\u6548\uff0c\u4e0d\u5927\u4e8e0.3V\uff0c\u9001\uff08\u53d7\uff09\u8bdd\u5668\u8f93\u51fa\u65e0\u6548\u65f6\u4e3a\u9ad8\u963b\uff09"]