This is a modular storage system for optical fibre cords, where no other storage system exists, or the existing overhead duct storage system is full. Used to route and store excess optical fibre cord length in a 300mm deep rack, before cords connect to transmission equipment. Maintains MBR for optical fibre cords at 30mm radius. Purchase as a "Start" kit TC3092-101KIT(Upper & Lower Modules) and add Central "Expansion" Module/s (TC3092-102KIT) as required. Each additional Expansion Module provides storage for about 500 - 1000mm extra cord length. Mid (170mm) or rear (235mm) mounts in a 21" rack. An accessory kit is provided.