R2CT™ Fiber Optic Connectors Radiall R2CT™ Fiber Optic Connectors are a flexible outdoor interconnection solution that meets the needs of telecommunication fiber-to-the-antenna (FTTA) and similar multi-signal applications in field conditions. Designed firstly for optical links using SFP transceivers and duplex LC-terminated fiber optic cable, this highly robust and flexible connector is also useful for electrical links. At the panel front of the Remote Radio Head (RRH) and Unit (RRU) equipment, the R2CT series is easy to install and provides a simple and protected low-cost waterproof and sealed connection.