Yeah, as long as you have spare wires in the cable you can do all sorts of things. Basically you just need 2 wires for the hub broadband and 2 other wires to distribute the telephony. Just keep broadband and telephony separate. If the master has a filtered faceplate, just connect the pair going to the hub to the data extension terminals and the pair going to the new phone-only socket to pins 2&5
