Release 2 also provides comprehensive support for all standard Asynchronous Transfer Mode (ATM) Quality of Service (QoS) classifications (CBR, VBR-rt
, VBR-nrt, UBR, and UBR+).
A software option allows migration to AAL2 packet voice services, such as switched virtual circuits, bandwidth-on-demand, AAL2 adaptation, VBR-rt
for variable bandwidth, echo cancellation, silence suppression with comfort noise generation, and voice encoding and compression algorithms, including G.711, G.726 and G.729a.
IMAS supports multiple ATM-standard QoS levels (CBR, VBR-rt
, VBR-nrt, and UBR) and comprehensive ATM traffic management and policing.