Fiber optic splice trays are also called Fiber splice cassette, splice enclosure or splice organizer.
They are located at intermediate points along a route where cables are required to be joined between the fiber optic cables and the pigtails.
It holds up to 12 splices sleeves or 24 splices sleeves and several trays could be stacked together to splice a large fiber cable.
Each tray provides space for mounting fiber splice protectors and excess fiber.