An Ethernet Passive Optical Network (EPON) is a single, shared optical fiber that uses inexpensive optical splitters to divide the single fiber into separate strands feeding individual subscribers. PONs is called "passive" because, other than at the CO and subscriber endpoints, there are no active electronics within the access network. Using these techniques to create a passive optical infrastructure, Ethernet in the First Mile PON (EFMP) builds a point-to-multi-point fiber topology that supports a speed of 1 Gbps for up to 20 km. While subscribers are connected via dedicated distribution fibers to the site, they share the Optical Distribution Network (ODN) trunk fiber back to the Central Office.
The Gigabit PON (GPON) standard (G.984), adopted by the ITU in February 2004, is the most recent PON variant to emerge. It is the result of an FSAN consortium initiative back in 2001 to standardize a PON capable of delivering over 1Gbps. GPON customers share downstream speeds of up to 2.48Mbps; the shared upstream speed is up to 1.24Gbps. It supports 32 users per tree at a recommended maximum distance between the OLT and ONT of 20km.
Wamin Optocomm Corp. is a leading designer and manufacturer in Taiwan of photonic integrated circuit based transceivers and optical subsystems for bandwidth-intensive, high-speed communications networks such as EPON and GPON. Showing below is the connection diagram for xPON Access and snapshot for Wamin’s Transceiver for EPON and GPON ONU.(next page)

		EPON Transceiver Module
		GPON Transceiver Module