Does this phone work with a Swisscom Internet Box light? (can't find any information on this) Does the phone connection provide enough power for this? Only the centre pins (3&4) are connected to the phone connection of the box. Can I extend the signal via RJ45 UKV to another room in the building? or do I need a telephone with a power connection? I would like to use a wired telephone for this application. Thank you very much for your support