Fiber termination box (FTB), also called optical termination box (OTB) is a small size and compact fiber management product used in FTTx (Fiber to the x, including FTTH, FTTB etc.) cabling—fiber cabling and cable management. In some cases, fiber termination box can be regarded as the mini size of fiber optic patch panel and ODF.

Indoor termination box is designed for use in residential, small and large businesses premises. The unit houses a single splice tray and allows fibers from internal or external cables to be spliced to pigtails for connection to the optical network unit. The unit can be quickly installed within a home, office or communication room environment. Internal or external cable can enter the unit from the bottom of the box or through the wall.