FTTX - (Fiber to the X) - FTTX refers to several different optical fiber architectures including: Fiber to the node/neighborhood (FTTN), Fiber to the exchange (FTTEx), Fiber to the cabinet (FTTCab), Fiber to the curb (FTTC), Fiber to the building (FTTB), Fiber to the home (FTTH) and Fiber to the premises (FTTP).