You said wireless is telegraph, telephone is wired, not shake a few on, the two ends of the telephone line is fixed, shake a few is to telephone power generation! During the war, people often steal information, so you cut the phone line and connect it to your own phone, so you can hear them talking!
You said wireless is telegraph, telephone is wired, not shake a few on, the two ends of the telephone line is fixed, shake a few is to telephone power generation! During the war, people often steal information, so you cut the phone line and connect it to your own phone, so you can hear them talking!