The OptiSwitch 300 is a Fast Ethernet and Gigabit Ethernet small footprint Optical Termination Unit (OTU) that provides a simple and cost-effective solution for connecting optical fiber between the customer premises and a broadband service provider. The OS300 Ethernet optical termination unit offers the service provider the capability to extend the Metro Network Ethernet service over fully managed optical 1000FX (GE) or 100FX (FE) links. It allows the carrier to offer the simplest level of Ethernet services: a fully managed native Optical Ethernet demarcation channel, with controlled bandwidth, protected network and customer ports, VLAN aware and unaware modes and cable diagnostics features.