Thank you whynhow and FriendlyKiwi

As you correctly identified I have extenders in the 5-2000 Mhz range, that travel to various sockets around the appartment. I would have to put the Satellite feed into these as well.

If Cablecom signals are in the < 950 Mhz range than it seems they are in the same range as as broadcast/terrestrial TV signals (5 - 862 Mhz), then it appears that all I require is to check if my wall sockets have cable and satellite outputs and see if "you can just plug you receiver box/TV to different sockets that will take care of proper signals". If not then use "good quality" Input duplexers.

The job may be more straightforward than I imagined.

Many thanks for the guidance.