Along with the transition to full data platform range from the core and metro to access network, the current broad band access technology and business (e.g. xDSL access) has been widely deployed around the world and proved to be successful.

On the other hand, to meet the customer's demand for more high bandwidth application and for the new marketing opportunities, the appeal of “Triple Play” services combining video, VoIP, and high-speed Internet access is driving carriers to pursue the deployment of FTTH, especially PON (Passive Optical Network), in the broadband access network.