The A301 card is a 2U PCI adapter that supports clear channel T3 (44.7 Mbps) and E3 (34.4 Mbps) over dual BNC connectors.

Based on bus mastering PCI technology supported by a
ring-buffer DMA architecture, the A301 provides 132 Mbps of PCI bus
transfer capacity with minimal real-time processor load.

The A301 is ideal for larger organizations or ISPs that have outgrown their multiple T1
or DSL links. The A301 allows these users to take advantage of the
relatively low cost of T3/E3 connections when compared to multiple T1
or E1 lines.