4.5 (564) · € 20.00 · En Stock
What is a Telephone with explanation of input device, output device, memory, CPU, motherboard, computer network, virus, software, hardware etc.
Telephone - Wikipedia
What is a Smartphone - javatpoint
What Is PSTN and How Does It Actually Work?
Telephone - Wikipedia
Scientist Alexander Graham Bell was a Scottish-born scientist
Who invented telephone - Javatpoint
Terms used in Mobile Communication - Javatpoint
What is ISDN? What are its Advantages? (Updated)
Clarity JV35W Amplified Telephone with Talk Back
Phone Definition - JavaTpoint