As I bought the MA5683T, when I connect with the ONT, What is the max transmit distance between them? And does MA5683T support 10G GPON?

Great improvement:
Symmetric 10G GPON (XGS PON): Supports XGS PON , Improves the upstream bandwidth from 2.5G to 10G and enhances symmetric service supporting.
ONT energy saving: Supports the ONT sleep mode. Reduces ONU power consumption for environmental protection.
8 times MAC address and ARP table than MA5680T and MA5683T.

Huawei MA5603T is multi service based while MA5683T is just OLT, MA5603T can support service like ADSL, VDSL, GPON etc, while MA5683T only supports GPON, P2P etc, but their hardware and configuration command is the same. The same as MA5680T and MA5600T.

Yes, it can be compatible, if Huawei GPFD board with B+ SFP modules, it doesn't effect if the ONT (Huawei HG8546M) with B+ or C+ modules.

Yes,Huawei MA5800 do have new typical New Hardware Board. H901TWED, 8-port symmetric 10G GPON interface board, it works together with the Huawei ONT to provide 10G GPON access services.

No, it can't. Huawei GPBD, Huawei GPFD GPON boards can be configured in Huawei MA5680T, Huawei MA5683T, Huawei MA5608T series equipment, but can not configure in Huawei MA5800 series equipment.

Board GPON Type Port Quantity Optical Module Maximum Split Ratio ONU based shaping H802GPBD 1G-GPON 8 SFP(Class B+ and Class C+) 1:128 No H805GPBD
H806GPBD 1G-GPON 8 SFP(Class B+ and Class C+) 1:128 Yes H802GPFDH805GPFD 1G-GPON 16 SFP(Class B+ and Class C+) 1:128 Yes H806GPBHH807GPBH 1G-GPON 8 SFP(Class B+ and Class C+) 1:128 Yes H802XGBC 10G-GPON 4 XFP 1:128 Yes Huawei GPBD Board Thunder link com

MA5603T is multi service based while MA5683T is just OLT, MA5603T can support service like ADSL, VDSL, GPON etc, while MA5683T only supports GPON, P2P etc, but their hardware and configuration command is the same.

No, no, no, you needn't worry about it, cause the end of life is for their software version-V800R006, not for the OLT-- MA5680T/MA5683T. As after V800R006, Huawei MA5680T/MA5683T has newer software now like V800R008, V800R011, V800R013 etc. For more information, you can log into

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MA5603T is multi service based while MA5683T is just OLT, MA5603T can support service like ADSL, VDSL, GPON etc, while MA5683T only supports GPON, P2P etc, but their hardware and configuration command is the same.
Note: both can't support AC power, but you can purchase a telecom level AC to DC converter if you just have AC power source.
MA5683T Price and Specs Huawei SmartAx OLT MA5683T Huanetwork com