I have a G 225 router linked to a 10Mb fibre line. The line is stable and Netflix on LAN cable never has an issue.
When I have 2-3 devices on Wifi which pulls close to 10Mb the router last less than 15min before it boms out. Only a manual restart fix this.
I believe the G225's WiFi capability is not matching the 10Mb fibre line.
I had Telkom and Open Serve techs at my house twice. Send in the router for repairs (tech report say no faults reported). Bought a new router. Redone the system set-up. Removed cordless phone and other devices.... everything.