The invention relates to an electro-optic modulator structure containing an additional set of bias electrodes buried within the device for applying bias to set the operating point. The affixing device includes a first screw ) and a second screw ), wherein the first screw is used to penetrate through the back cover and to firmly tighten onto the front cover, so that the front cover and the back cover are affixed together. A method for transmitting and propagating alerts according to corresponding parameters in such a network is also described.