In a system and method for the collection of alphanumeric data from Customer Premise Equipment at the behest of an enhanced service provider requesting said data, a CPE transmits the data in the form of a synthesized voice signal, obviating the need for modems. In one embodiment, the cavity length of the laser may be adjusted by means of a movable mirror forming one end of the cavity. Subsequently, heat treatment is performed on the Al2O3 in an oxidation atmosphere, thereby accelerating oxidation of its surface. The channel is closed through applying a pressurized medium to the shutter channel, and the channel is opened through releasing a pressure of the pressurized medium. For improving the applicability of the machining apparatus, this machining apparatus according to the invention is characterized by a workpiece-holding table that is designed such that it bridges the workpiece support and can thus be firmly attached to the frame. The rim gear and power gear can be placed in position to constrain the rod to move along the axis of the cylinder.