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Voice over ATM (VTOA - Voice and Telephone over ATM)
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QoS parameters: delay, jitter in delay, loss rate
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CBR for voice current ATM Forum specification
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silence detection (voice has 60% of silence)
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unstructured circuit emulation: maps entire T1 circuit to a single ATM VC
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structured circuit emulation: maps individual 64 Kbps circuits to ATM VCs
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Compression: G.726 ADPCM, G.728 LD-CELP, G.729 CS-ACELP
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average national network delay for voice traffic specified by G.114, G.131, G.126
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current VTOA: lack of compression, lack of silence suppression, limitations of AAL1
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