Method and system for providing DC power on local telephone lines

A telephone unit device connectable in series between an analog telephone set and a wire pair coupled to a telephone service and carrying DC power and an analog telephone signal, said device comprising:

• a first connector connectable to the wire pair;
• a second connector connectable to the telephone set;
• a signal passing circuit connected between said first and second connectors for passing substantially without change the analog telephone signal between the wire pair and the analog telephone set;
• and a DC/DC converter connected in series between said first and second connectors for receiving DC power only from the wire pair and converting the DC power to a level suitable for proper telephone operation of the analog telephone set connected thereto
• wherein:
• said signal passing circuit comprises a transformer composed of a primary winding and a secondary winding and first and second capacitors, each said capacitor being connected in series with a respective one of said windings;
• and
• said DC\DC converter is connected between said first and second capacitors.