A system, an unbundling optical line terminal (OLT), and a method are described herein that allow at least two service providers (SPs) to use individual fibers of an optical distribution network (ODN). In one embodiment, the unbundling OLT includes one or more wavelength division multiplexing-passive optical network (WDM-PON) line cards and one or more SP uplink cards that enable multiple SPs to each utilize one uplink port to access individual wavelengths of one or more passive optical networks (PONs). In another embodiment, the unbundling OLT includes one or more point-to-point line (p2p) line cards (e.g., p2p fiber Ethernet line cards) and one or more SP uplink cards that enable multiple SPs to each utilize one uplink port to access one or more individual fibers.