@Cumzilla
If it is really confirmed that Singtel Airties 4960R can not work in AP mode, you have two options. I will recommend Option 1 as there is no guarantee that Singtel TV box will work for Option 2 now that we know Airties 4960R is weird.
The user guide does not mention anything related to Singtel TV box either.
https://www.singtel.com/content/dam...ties4960/AirTies 4960R Installation Guide.pdf
But it is reported that the following configuration works fine.
ONT -- Airties AIR 4960R (router mode, with built-in Singtel VLAN profile) -- Singtel TV Box
https://forums.hardwarezone.com.sg/threads/singtel-1-gbps-fibre.5930834/post-143898041
1) Forget about it and sell it away. the following configuration should still work. Then buy a proper router like TP-Link Archer AX72 (AX5400) and set it up as an wireless AP. It will have better Wifi performance than the Singtel issued routers.
Singtel ONT -- Singtel Mesh Router in DB box -- Singtel AC Plus (disable WiFi) + Singtel TV Box in TV console area
Singtel AC Plus -- TP-Link Archer AX72 in wireless AP mode to provide wireless access
2) If you really want to use the Airties 4960R, try the following configuration. It may or may not work.
Singtel ONT -- Airties 4960R in DB box -- TP-Link TL-SG105 switch (below S$30) in DB box
Console area LAN port -- Singtel Mesh Router + Singtel TV Box in TV console area