its rubbish
much bandwidth is used
Public Switched Telephone NetworkPublic Switched Telephone NetworkPublic Switched Telephone NetworkPublic Switched Telephone Network
The first circuit-switched network was the telephone system.
PSNT Public Switched Telephone Network
Analog connection to the Public Switched Telephone Network.
Advantages are that you will know where everything is and when things will be done. Disadvantages are they are difficult to make.
Telephone mainlines are telephone lines connecting a customer's equipment to the public switched telephone network.
All phones.
centralized control
Analog switches Fiber optic cables
Analog Switches Fiber Optic Cables
Analog Switches Fiber Optic Cables