Question

company is planning to open a new interstate branch in Brisbane and the new branch will have access to all data in the main office. What solution would you recommend to secure the data communication between the two branches?

Answer 1

PSTN(Public Switched Telephone Network):

Using underground copper wires, this legacy platform has provided businesses and households alike with a reliable means to communicate with anyone around the world for generations.

How Do PSTN Phone Lines Work:

Step #1 – Your telephone set converts sound waves into electrical signals. These signals are then transmitted to a terminal via a cable.

Step #2 – The terminal collects the electrical signals and transmits these to the central office (CO).

Step #3 – The central office routes the calls in the form of electrical signals through fiber optic cable. The fiber optic conduit then carries these signals in the form of light pulses to their final destination.

Step #4 – Your call is routed to a tandem office (a regional hub responsible for transmitting calls to distant central offices) or a central office (for local calls).

Step #5 – When your call reaches the right office, the signal is converted back to an electrical signal and is then routed to a terminal.

Step #6 – The terminal routes the call to the appropriate telephone number. Upon receiving the call, the telephone set converts the electrical signals back to sound waves.

This may sound complicated, but the thing to remember is that it takes a few seconds for your call to reach its destination. This process is facilitated by using fiber optic cables and a global network of switching centers.