A Detailed Guide to Public Switched Telephone Network (PSTN)

Hodusoft02 Nov, 2022Technology

Do you know the first commercial telephone service in the world began in Hamilton, Ontario, Canada on June 20, 1877? This service was based on the patent Alexander Graham Bell received in 1876. On 10th March 1976, Bell spoke the first words via a telephone. And, these words were, ?Mr. Watson, come here, I want to see you?.