Mitel Superset 4150 will not conect

This phone is a digital phone and requires connection to a digital system commonly called a "key system". If you have removed it from where it was connected and tried to use it at home or somewhere else it will not work. Most home or normal phone jacks are connected to your local provider directly and is what is called an analog system. The 2 are NOT compatable without an interface device. If it is connected to a key system then thier is a problem with the port on the Mitel keysystem that goes to the jack you are plugging the phone into and you will need a technician to fix/rewire this onsite. Hope this helps you. A manual for your phone can be gotton here: http://www.octelephone.com/4150user.pdf