The MGX-AUSM-8E1 ATM UNI service module (AUSM) offers eight E1s providing up to 16 Mbps of bandwidth for ATM service interfaces for the new world of data networking.Consistent with Cisco's intelligent quality of service (QoS) management features, AUSM/B cards support per-VC queuing on ingress and multiple class-of-service queues on egress. AUSM/B cards fully support continuous bit rate (CBR), variable bit rate (VBR), unspecified bit rate (UBR), and available bit rate (ABR) service classes.