the fact the box says telewest is not a problem - VM is a conglomeration of lots of early companies - telewest was one of them
the 2 cables under the phone box look like coax cables - baybe they feed back to the splitter - if they do you can disconnect them and connect your cable to the splitter and then the other end to the hub - that should work but one will be uncapped which is not a good idea - that said both are uncapped now if the cut cables connect to the splitter
so the best way is to remove the splitter from the circuit as i suggest above - again as said that will affect the input levels so post them and see if they are ok
log into hub3 - 192.168.0.1 [or 192.168.100.1 if in modem mode] - DON'T SIGN IN, click - click router status [centre of screen] - and post the downstream and upstream figures - to see those press on the grey buttons/boxes labelled - upstream - downstream
if they are out of spec book a tech to sort them as a faut - thats foc
if its an earlier hub button is top right
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Tony.
Sacked VIP