Apparatus and method for coupling analog subscriber lines connected to a private branch exchange for transmission of network data signals in a home network

A computer network comprising:

• first and second end stations;
• first and second twisted pair telephone wiring having first ends coupled to the first and second end stations, respectively;
• a private branch exchange coupling second ends of the first and second twisted pair telephone wiring and configured for communication of analog telephone signals on at least one of the first and second twisted pair telephone wiring;
• and
• a high pass circuit, coupled between the first and second twisted pair telephone wiring, for transmission of network data signals, having frequencies substantially higher than the analog telephone signals, between the first and second end stations.

A private branch exchange (PBX) for use in a customer premises, the private branch exchange comprising:

• a first connection for a plurality of lines output from a network termination basic access (NTBA) device, the NTBA device configured for sending and receiving ISDN-based telephone signals to and from a public switched telephone network;
• a group of second connections for interconnecting twisted pair telephone lines serving one of telephones and end stations of a customer premises computer network;
• an analog telephone switch configured for switching analog telephone signals between the second connections and the first connection;
• and
• a high pass circuit for transmission between the second connections of network data signals transmitted by the end stations at frequencies substantially higher than the analog telephone signals.