^afaik, walang ibang firmware like 3rd party na pwede iinstall sa 5v5, para magkaron sya ng sariling bandwidth limit settings kung yan ibig mo sabihin, though yung native firmware(flashed or unflash) nya ay ready for pppoe client and ipoe(static/dynamic ip).
the good thing is pwede pa din naman magset ng bandwidth(ingress/egress) sa mismong OLT, may ganoong feature sya na nakikita ko like sa richerlink brand na gamit ko, though bihira kasi gumagawa nyan, dahil sa network server(MT,pfsense etc.) mismo naka set yan, sama-sama na dun bandwidth management, pppoe server, ip assignment, routing, load balance etc.