Digital subscriber optical fiber transmission system

Abstract From the Canadian patent

A fiber-optic subscriber transmission system is provided for accommodating a plurality of digital subscriber line signals and telephone signals. A plurality of subscribers is connected through telephone lines with remote nodes, which are connected with a terminal office through optical fibers. Remote nodes convert the signals sent by subscribers through telephone lines into digital signals. Then, the remote nodes convert the digital signals to light signals by time-division multiplexing and send them to the terminal office through optical fiber cables. The terminal office receives the light signals and extracts the original subscriber signals by demultiplexing and D/A conversion of …