A method for establishing a high-speed modem relay connection over a voice frame network between an originating modem with an associated calling-leg gateway and an answering modem with an associated called-leg gateway is described. The articulation mechanism includes a first gear rotatably mounted on a transmission shaft and configured to engage a second gear, a clutch interconnecting the second gear and a main shaft; and a yoke shaft coupled to the main shaft and adapted to linearly advance a J-channel, the J-channel operatively connected to an articulation link. Roots of PKIs for individual organizations also reside at this server or another globally available resource. A cover plate is adapted for engagement with each rail to cover the rail when the rail is not in use, the cover plate being shaped to replicate the extended arc of the sides of the half grip up to a flat longitudinally extending rib running along the center of the cover plate. The food additive composition can be highly concentrated and is excellent in flavor as well as dispersibility in liquid.