System and method for line-conducted digital communication

A system for line-conducted digital communication between an exchange of a teleconununication network and subscribers connected thereto, said system comprising:

• at least one cross connector having active components, said at least one cross connector being connected to said exchange by a first communication line, said cross connector having a channel allocator for selectively allocating service transmission channels to the subscribers and for providing combined subscriber service channel signals from said subscribers back to said exchange;
• at least two distribution terminals having active components, said distribution terminals being connected to said at least one cross connector by a second communication line and each of said distribution terminals being installed near to said subscribers, wherein at least one of said first and second communications lines is an optical transmission line;
• at least one subscriber unit, said subscriber unit being connected to one of said distribution terminals by an electrical transmission line at an interchange point, each of said at least one subscriber unit for connecting a respective subscriber service channel device;
• a bus line connected to said interchange point, for connecting in parallel said at least one subscriber unit for providing in parallel a respective subscriber service channel device signal to said respective subscriber service channel device.