A communication system comprises a central unit configured to transmit and receive communication signals; a remote unit configured to transmit and receive communication signals; and a regenerator unit configured to regenerate and transmit received communication signals, the regenerator unit comprising a first interface, a second interface and a control and status circuit configured to control operation of the first and second interface, wherein each interface is configured to operate as an independent logical regenerator unit; wherein the central unit and the remote unit communicate over a first communication loop via the first independent interface of the regenerator unit.