Which access architecture type replaced the Asynchronous Passive Optical Network (APON)?

The access architecture that replaced the Asynchronous Passive Optical Network (APON) is the Gigabit-capable Passive Optical Network (GPON). GPON enhances the capabilities of APON by supporting higher data rates and providing more efficient use of bandwidth. The introduction of GPON allowed for data transmission at speeds of up to 2.5 Gbps downstream and 1.25 Gbps upstream, which significantly improved the performance and capacity of fiber optic networks.

GPON employs a more efficient and robust architecture that can handle integrated voice, video, and data services. This integration of multiple services over a single network infrastructure is a major advancement compared to APON. Furthermore, GPON utilizes a point-to-multipoint architecture, allowing a single fiber to serve multiple customers while maintaining high-quality service levels.

The advancements in GPON technology, such as improved error correction and support for longer distances without compromising signal quality, make it the preferred choice in modern fiber optic communications, ultimately providing a more reliable and faster internet experience for users.