Small headsup to the few of you who might want to save 2 days of messing around. Mate's Fibre install done almost a year ago. Mine lastweek. Spark supplied me a 'free' modem Hauwei HG630b single 2.4GHz WiFi. I own SurfacePro3 and acts like a dog on anything other than 5GHz with benefit of 802.11ac. Hence why friend and i lept at cheap modem/router offer...
(Setup Dlink for WAN for 'Residential gateway UFB option) for a Cat5 cable that runs back to the installed ONT, note to all you must tick the box for VLAN opens option for VID, and type in 10 from Spark infopage... )
Everything working fine and interesting i seem better performance speedtest on Surface using 5GHz WiFi than my desktop that must have slower performing Ethernet port handling from the router...
Meanwhile mate's DSL-2880L WILL NOT work off WAN port for him... Everything is the same but steadfast NO-GO!
We meet up and exchage modems. Still his arrangement will not work on his almost 1yrold Fibre Install. His unit fine on my install!
Then he swapped out the as-installed Telecom cable from ONT to modem outlet (which was working ok with his old supplied modem) with new fresh made Cat5 run.... between WAN port of DSL-2880L and FIXED...
It appears Telecom used some other kind of cable standard in their earlier installs... So always try doing a CHANGEOUT of your original ONT run folks if you are dealing with an earlier Fibre Install and save a whole lo of hassle...!