A cutting insert has a circular top surface, a bottom surface shaped to be identical to the top surface, a cylindrical side surface for connecting the top and bottom surfaces, and cutting edges formed between the top and side surfaces and between the bottom and side surfaces. According to one embodiment, a system includes a content server, an insertion server and a policy server. Furthermore, the architecture allows a central concentrator to support a plurality of remote devices that each have guaranteed bandwidth through connection-oriented allocations of bi-directional data flows.