Patent ID: 7492768

Claim:
A system for virtual LAN constitution of an E-PON (Ethernet-Passive Optical Network), the system comprising: a plurality of ONUs (Optical Network Units) located at subscribers' sites, the ONUs carrying a port ID (Identification) number and a system ID number on a logical link identifier and transferring an Ethernet frame including the logical link identifier; and an OLT (Optical Link Terminal) located at a central telephone exchange's site or a headend's site, the OLT determining a virtual LAN group allocated to a logical port of the OLT using an ID of the logical port that receives the Ethernet frame from the plurality of ONUs and the logical link identifier included in the Ethernet frame, and providing a corresponding virtual LAN service, wherein the OLT maps its profile information and profile information of the ONUs to construct a virtual LAN membership table based on the logical port, and wherein the mapping between the OLT and the ONUs is coupling a physical OLT port number, the system ID number of the ONU, the port ID number of the ONU, and the corresponding logical link identifier to a logical port number of the OLT.