Patent ID: 7158789

Claim:
A communications network, in particular for telephony, comprising: at least one operator; a plurality of remote units designed to exchange signals with the operator and to exchange radio frequency (RF) signals with mobile terminals; an interface unit inserted between the operator and the remote units, the interface unit having at least one input for receiving signals from the remote units and at least one output for sending signals to the remote units, the interface unit also being designed to exchange signals with the operator; a first transmission support for connecting the interface unit to the remote units , the first transmission support being designed to support a main signal, the first transmission support having a first end connected to the interface unit input and at least a second end connected to the interface unit output, the main signal consisting of a plurality of secondary signals, each identified by a preset parameter value, each of the remote units receiving said main signal and being designed to process a secondary signal intended for it, each of the remote unites being able to select at least one secondary signal intended for it from said main signal according to the preset parameter value; wherein each remote unit comprises: a signal transmission block connected to the first transmission support for picking up at least one secondary signal from the main signal to be transmitted in the Down-Link (DL); a signal reception block connected to the first transmission support for adding at least one signal received in the Up-Link (UL) to the main signal; an antenna attached to the signal transmission block and to the signal reception block for transmitting RF signals to the mobile terminals and for receiving RF signals from the mobile terminals, wherein the signal transmission block comprises: an optical filter element connected to the first transmission support for selecting, within the main signal, the secondary signal characterized by the parameter value associated with the remote unit; preferably a first equalizer block connected downstream of the optical filter element; a first electro-optical converter, for converting the optical signal from the interface unit into an electrical signal; a first amplifier block connected to the first electro-optical converter; a first RF filter for filtering the signals from the first converter.