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The VideoPhone 2500-Video Telephony on the Public Switched Telephone Network

Scott H. Early, A. Kuzma, Eric Dorsey

Open publisher page 11 citations

Abstract

The AT&T VideoPhone 2500 is the first video telephone to provide color, motion video over the analog loop on the public switched telephone network. The enabling technologies include video and audio compression, as well as a high-speed modem (modulator-demodulator). This paper describes the overall architecture of the VideoPhone 2500 and operation of individual subsystems, including design considerations. It also provides details about the market research and business decision process that led to AT&T's entry into the video-telephone market.

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What this paper is about

The AT&T VideoPhone 2500 is the first video telephone to provide color, motion video over the analog loop on the public switched telephone network. The enabling technologies include video and audio compression, as well as a high-speed modem (modulator-demodulator). This paper describes the overall architecture of the VideoPhone 2500 and operation of individual subsystems, including design considerations. It also provides details about the market research and business decision process that led to AT&T's entry into the video-telephone market.

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OpenAlex reports 11 citations for this work. Citation counts describe recorded attention and do not establish research quality.

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Available abstract

The AT&T VideoPhone 2500 is the first video telephone to provide color, motion video over the analog loop on the public switched telephone network. The enabling technologies include video and audio compression, as well as a high-speed modem (modulator-demodulator). This paper describes the overall architecture of the VideoPhone 2500 and operation of individual subsystems, including design considerations. It also provides details about the market research and business decision process that led to AT&T's entry into the video-telephone market.

Key concepts: Videophone, Videotelephony, Telephone network, Telephony, Public switched telephone network, Telecommunications, Computer science, Mobile radio telephone

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