The bi-directional wavelength division-multiplexing (BWDM) interface carries two distinct channels in different directions on a single strand of fiber.??The BWDM Interface converts electrical signals to wavelengths on a single strand of fiber, and provides a manageable, cost effective solution to achieve distances up to 20km. At one end of the connection one wavelength is used to transmit (e.g., 1310nm or 1550nm), and another wavelength is used to receive (e.g., 1310nm or1550nm).??Bi-directional fiber connectivity improves network scalability and serviceability and is ideal for both MAN and LAN applications where additional users must be supported on existing fiber connections. BWDM eliminates the need to install a second fiber and effectively doubles the fiber capacity on existing fiber cables. This provides a 100% improvement in fiber utilization since only a single fiber strand is required. Thus, fiber costs, installations costs, and maintenance costs all reduce the overall cost... Minimize