PON Standards

	BPON	EPON	GPON
Standard	ITU G.983	IEEE 802.3ah	ITU G.984
Downstream speeds	155Mbps, 622Mbps, 1.2Gbps	1.25Gbps	1.24Gbps, 2.5Gbps
Upstream speeds	155Mbps or 622Mbps	1.25Gbps	155Mbps, 622Mbps, 1.2Gbps, 2.5Gbps
Downstream wavelength	1480~1500nm	1500nm	1480~1500nm
Upstream wavelength	1260~1360nm	1310nm	1260~1360nm
Layer 2 support	ATM	Ethernet	Ethernet over GEM and/or ATM
Voice support	TDM over ATM	TDM over packet	Ethernet over ATM/IP or native TDM
Video support	RF overlay (over 1550nm) and/or IP video	IP video	RF overlay (over 1550nm) and/or IP video
Maximum PON splits	32	16	64
Distance	<20Km	<20Km	<60Km

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