US 5,999,525 · Granted 1999-12-07

The 1996 Patent That Let You Video Call Over the Internet

Before Zoom and FaceTime, someone had to figure out how to squeeze video calls through the messy combination of phone networks and the early internet. This patent describes a system that lets people send crystal-clear video, audio, and data to each other across both traditional telephone lines and the internet at the same time, all controlled from one central place.

Curated and verified by the IsItPatented Editorial team

The plain-English version

What it protects

The claim covers a method for routing video, audio, and data communications simultaneously through a hybrid network that combines switched telephone infrastructure with internet connectivity. What's protected here is the ability to manage call quality, direct multimedia traffic intelligently between different types of networks, and let users control these network activities from a central management point rather than having everything handled automatically at the network edge.

Why it matters

This patent arrived right at the inflection point when the internet was becoming viable for real-time communication instead of just email and web browsing. MCI Communications, one of the major long-distance carriers of the 1990s, was protecting its claim to a fundamental infrastructure capability—the ability to blend old telephone technology with new internet technology so they could offer video calling to customers. This kind of hybrid routing would become foundational to how modern video calls actually work today.

Real-world use

Every time you make a video call on your phone or computer, your data is being routed through both dedicated network pathways and internet infrastructure in ways that trace back to problems this patent was solving.

Original USPTO abstract

Telephone calls, data and other multimedia information including video, audio and data is routed through a switched network which includes transfer of information across the internet. Users can transmit video, audio and data communications of designated quality over the internet to other registered video telephony users. Users can manage more aspects of a network than previously possible, and control network activities from a central site.

Patent details

Publication number: US 5,999,525
Filing date: 1996-11-18
Grant date: 1999-12-07
Assignee: Mci Communications Corporation
Inventor(s): KRISHNASWAMY; SRIDHAR, ELLIOTT; ISAAC K., REYNOLDS; TIM E., FORGY; GLEN A., SOLBRIG; ERIN M.
CPC class: H04M7/1205

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