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2. itu-t, “Pulse code modulation (PCM) of voice frequencies”, itu-t Recommendation G.711, 1988.
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4. atm Forum, “User-Network Interface (uni) Specification Version 3.1”, atm Forum, September 1994.
5. Wright (D.), “Voice Over ATM: An Evaluation of Implementation Alternatives”,IEEE Communication Magazine,34, no5, May 1996, pp. 72–80.