Yes, Point to Point telecommunications allow for video chat bythe applications and services of soft phone, presence, instant messaging, visual voicemail, employee directory, communication history, video, and web conferencing.

I do not believe there is an exact answer to this question. Apparently there are lots of different theories on who and when the internet was invented.

In telecommunications it means Pulse Code Modulation, which is a digital means of sending a signal from point A to point B.

demarc

They are used in telecommunications for high-speed wireless broadband communication and point-to-point wireless local area networks (WLANs).