Transmits full-duplex serial data at speeds up to 115.2 kbps while simultaneously receiving simplex IRIG-B time codes. No External Power Required-Draws parasitic power directly from the host device's standard 9-pin DB-9 serial port. Long Distance Coverage-Supports communication link lengths up to 4 kilometers (2.49 miles) over multimode optical fiber. High Noise Immunity-Features a maximum bit error rate of 10⁻⁹, eliminating ground potential rise risks, electrical noise, and EMI/RFI issues common to copper lines. Physical Connections-Designed with an integrated DB-9 female interface for the serial host and standard ST optical connectors for the fiber pairing. Ruggedized Build-Operates reliably in harsh environments across temperatures from –40°C to +85°C (–40°F to +185°F).