I am working in a building where two firms are located. We bothe use the same telephone system and telephones, Panasonic KX T7030. I have recently moved office where the other firm had occupied. They are still in the building and their phone is still in the office. There are two sets of lines, one allocated to us and the other allocated to them. My question is can I configure the phone so that I can make outgoing calls or will I need to get someone in to install a new telephone line?