A communication system includes: a plurality of mobile communication terminals; a server device; and a plurality of relay devices performing a relay between the plurality of mobile communication terminals and the server device. A priming discharge is performed between auxiliary electrodes, which are formed on a front substrate and coupled with scan electrodes, and priming electrodes formed on a back substrate. A connector extending between the upper ends of the upright members constrains the axle carriers for rotation in the same direction about their respective pivotal axes. If a message is transmitted from a router behind a firewall to a router outside the firewall, and then a request for data is received from a processor behind the firewall, the processor is redirected to the address of the router. The neuroelectrode is formed on a flexible or rigid substrate with the aid of a line and of a microcapillary. In this connection, the liquid crystal modulator is arranged at close proximity to the monitoring andor recording device so that bright interference light sources are not only displayed as darkened but also blurred.