The GarrettCom model 5844 are hardened fiber optic Link/Repeaters that convert RS232 or TTL level copper to amplitude based fiber output. 5844 Link/Repeaters support data rates from dc to 250 Kbps, DCE or DTE port configuration and a diagnostic/test mode that allows testing of the copper and fiber connections before the connected IED is active in the network. brbr GarrettCom 5844 media converters are Class 1, Division 2 certified for use in hazardous locations in the US and Canada. The Class 1, Division 2 certification mark allows use of GarrettCom links in ignitable environments requiring spark-free operation. This is a requirement for many customers, particularly those in petroleum and petrochemical applications, where hazardous ignitable environments abound. brbr By simply setting a few switches, the GarrettCom 5844 Link/Repeaters can be configured for point-to-point, star, optical bus, or loop networks, and permit quick, easy connection of devices. For example, an extensive multi-drop network – where two or more intelligent electrical devices are connected and communicating – can be constructed simply by connecting the devices through Link/Repeaters.