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Answer» The following table explains the difference between GPON and EPON. | GPON (ITU-T G.984) | EPON (IEEE 802.3ah) |
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| Downlink/Uplink | 2.5G/1.25G | 1.25G/1.25G | | Optical Link Budget | Class B+:28dB;Class C: 30dB | PX20: 24dB | | Split ratio | 1:64 --> 1:128 | 1:32 | | Actual downlink bandwidth | 2200~2300Mbps 92% | 980Mbps 72% | | Actual uplink bandwidth | 1110Mbps | 950Mbps | | OAM | Complete OMCI function + PLOAM + embed OAM | Flexible and simple OAM function | | TDM service & synchronized clock function | Native TDM, CESoP | CESoP | | Upgradeability | 10G | 2.5G/10G | | QoS | DBA schedule contains TCONT, PORT-ID; fix bandwidth/guarantee bandwidth/non guarantee bandwidth/ best-effort bandwidth | Support DBA, QoS is supported by LLID and VLAN | | Cost | 10%~20% higher cost than EPON currently, and almost same price in large volume | -- |
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