There is no additional cabling required. It works with existing cabling and dish. To activate with existing subscription, you need to insert old digicard in this new HD digicomp. First time when you connect digicomp, it will download software and then restart couple of times automatically. It will give message as this digicard XXX is not for this digicomp. You call customer care and give them infomration.. they will then do necessary adjustment and activate HD subscription..I do not understand why location should make any difference.. just try calling them again..When I called customer care for activation of HD gold pack they said that it will take 24hrs!.. I insisted to check again..then it got activated within a minute..