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New posts in Telephone
Tool to test analog phone line connection quality
Jul 09, 2021
Automated telephone call about sending spam mails
Apr 25, 2021
How were four wires replaced with two wires in early telephones?
Apr 25, 2021
How was the first overseas phone call possible back in 1927?
Apr 23, 2021
Why are modern telephone lightning arrestors less prone to (rectification) RFI problems than old ones?
Apr 23, 2021
How does the telephone's keypad work?
Apr 25, 2021
Why do push button telephones use dual-tone for signalling?
Apr 25, 2021
Why do devices stop operating properly in extreme cold?
Apr 25, 2021
Amplification before tubes and transistors were invented
Apr 22, 2021
When a AM radio wave reaches the antenna does the signal need to be in a closed circuit to be amplified?
Apr 22, 2021
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