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2. History of videotelephony - Wikipedia

   en.wikipedia.org/wiki/History_of_videotelephony

   By 1930, AT&T's "two-way television-telephone" system was in full-scale experimental use. [7] [20] The Bell Labs' Manhattan facility devoted years of research to it during the 1930s, led by Dr. Herbert Ives along with his team of more than 200 scientists, engineers and technicians, intending to develop it for both telecommunication and broadcast entertainment purposes.

3. Videotelephony - Wikipedia

   en.wikipedia.org/wiki/Videotelephony

   The movie was released shortly before AT&T began its efforts to commercialize its Picturephone Mod II service in several cities and depicts a video call to Earth using an advanced AT&T videophone—which it predicts will cost $1.70 for a two-minute call in 2001 (a fraction of the company's real rates on Earth in 1968).

4. Video over LTE - Wikipedia

   en.wikipedia.org/wiki/Video_over_LTE

   The H.264 codec delivers superior quality as compared to the low bit rate 3G-324M codec that is used in 3G conversational video calls. It is vital that ViLTE video calls are allocated appropriate quality of service (QoS) to differentiate and prioritize this delay and jitter sensitive conversational traffic from other streaming video traffic ...

5. Rich Communication Services - Wikipedia

   en.wikipedia.org/wiki/Rich_Communication_Services

   AT&T United States: November 2015: Yes iOS 18 [125] Branded as Advanced Messaging and Video Call. [128] [129] In June 2023, AT&T converted to Google Jibe for RCS services. [62] AT&T announced the RCS capable AT&T Messages Android apps would be discontinued in 2024, recommending use of Google Messages instead. [130] Base Belgium: February 2021 ...

6. List of mobile virtual network operators in the United States

   en.wikipedia.org/wiki/List_of_mobile_virtual...

   Mobile virtual network operators (MVNOs) in the United States lease wireless telephone and data service from the four major cellular carriers in the country—AT&T Mobility, Boost Mobile, T-Mobile US, and Verizon—and offer various levels of free and/or paid talk, text and data services to their customers.

7. AT&T apologizes for massive system failure but rules out ...

   www.aol.com/t-outage-latest-phone-network...

   AT&T has said that a massive outage that left people unable to make calls – including to 911 – was not caused by a cyber attack.. The provider said thew outage was caused by “the application ...