FIELD: optical instruments. SUBSTANCE: device has unit 5 which inputs and outputs control optical signals from fiber-optical line 2. Said means include light source unit 1, receiving unit 3 which are used for input from optical line 2 and/or control signals which are sent to line and have wavelength which substantially differs from wavelength of signals for remote communication. Each unit 11 is connected to corresponding optical element 6 which is connected to light guide 2. They are used for connection to optical fiber of line and/or for reading optical control signals from line. EFFECT: increased functional capabilities. 8 cl, 5 dwg
