Question

Why we. Call hello in a telephone

Answer 1

Answer:

to alert the person that someone is there on other side

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Answer 2

Hello has to have been the standard English language greeting since English people began greeting, no? ... The dictionary says it was Thomas Edison who put hello into common usage. He urged the people who used his phone to say "hello" when answering. His rival, Alexander Graham Bell, thought the better word was "ahoy."