ATM technology (19)
Voice over ATM (VTOA - Voice and Telephone over ATM)
QoS parameters: delay, jitter in delay, loss rate
CBR for voice current ATM Forum specification
silence detection (voice has 60% of silence)
unstructured circuit emulation: maps entire T1 circuit to a single ATM VC
structured circuit emulation: maps individual 64 Kbps circuits to ATM VCs
Compression: G.726 ADPCM, G.728 LD-CELP, G.729 CS-ACELP
average national network delay for voice traffic specified by G.114, G.131, G.126
current VTOA: lack of compression, lack of silence suppression, limitations of AAL1