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K. Hal Purdy
K. Hal Purdy
Voice over IP
Computer network
Telephony
Technological convergence
Business
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2024
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the Evolution to Internet Telephony
1999
Christos A. Polyzois
K. Hal Purdy
Ping-Fai Yang
David Shrader
Henry Sinnreich
Mci WorldCom
François Menard
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