The TFC-1000S40D5 Bi-Directional Intelligent Fiber Converter works with the TFC-1600 chassis system or as a standalone unit. This converter is a Dual Wavelength Single Mode SC-Type fiber converter that supports port-based SNMP reporting and spans distances up to 40km (24.9 miles). This module must be used with the TFC-1000S40D3 module. Ports include 1 x 1000Base-TX (RJ-45) port and 1 x 1000Base-FX (SC Simplex Type) port.