Fiber to the x (FTTX) is a term used for broadband network architecture that utilizes optical fiber to provide all or part of the local loop used for last mile telecommunications. The x serves as a placeholder for several fiber deployment configurations such as FTTN (fiber to the neighborhood/node) and FTTD (fiber to the desktop). Fiber setups that feed fiber directly into the building offer the highest speeds since the remaining segments can use standard Ethernet or coaxial cables.
These network generally employ very-high-bit-rate digital subscriber line (VDSL) at downstream rates of well over 20Mbit/s. Some programs plan to offer 1000/1000 Mbit/s symmetrical connections directly wired into consumer homes.
Fiber is considered to be exempt from obsolescence because the data rate of the connection is limited by the terminal equipment rather than the fiber cables. This leaves room for incredible speed improvements through system upgrades without needing to replace the fiber.
As you can tell, fiber optic systems give businesses and consumers powerful and cost effective solutions for broadband networking.