Caution: Web Randomness Alert!
Stumbling around the web for something else, I found a little piece of telephony trivia – Why Telephones Use Negative Forty-Eight Volts DC.
Josh’s Random Thoughts
Caution: Web Randomness Alert!
Stumbling around the web for something else, I found a little piece of telephony trivia – Why Telephones Use Negative Forty-Eight Volts DC.