Technology |
EPON |
GPON |
Standardization Organization |
IEEE EFM |
ITU-T/FSAN |
Standard |
IEEE 802.3ah |
ITU-T G.984 |
Transport Layer Protocol |
IP/Ethernet |
ATM/GEM |
Downstream Multiplexing Technique |
TDM |
TDM |
Upstream Multiplexing Technique |
TDMA |
TDMA |
Data Service Bearing Mode |
Ethernet |
GEM |
Max. Transmission Distance (km) |
10, 20 |
20 |
Max. Downstream Speed |
1.25Gbit/s |
2.5Gbit/s |
Max. Upstream Speed |
1.25Gbit/s |
1.25Gbit/s |
Splitting Raito |
1:16, 1:32, 1:64 |
1:16, 1:32, 1:64, 1:128 |
ONU Interface |
10/100/1000M Ethernet Interface |
ATM, TDM and 10/100/1000M Ethernet Interface |
OLT Service Node Interface |
1G and 10G Ethernet Interface |
ATM,TDM and 1G and 10G Ethernet Interface |
Upgrade Difficulty |
normal |
normal |
User Network Cost |
low |
higher |
Service Node Cost |
low |
higher |