BACKWARD COMPATIBLE PON COEXISTENCE

摘要

An apparatus comprising an optical line terminal (OLT) component, an optical network unit (ONU) component, and an optical router component coupled to the OLT component and the ONU component. The disclosure includes a network comprising a first OLT, and a second OLT coupled to the first OLT and in communication with at least one first-type ONU and at least one second-type ONU. Included is an OLT configured to implement a method comprising forwarding a first downstream data from a first-type OLT to at least one first-type ONU, and transmitting a second downstream data to at least one second-type ONU. Also included is a method comprising adding at least one second-type ONU to a passive optical network (PON) comprising a first-type OLT and at least one first-type ONU without removing the first-type OLT from the PON.