Abstract: A frame detection circuit for SONET which operates in both the OC-3 and OC-12 modes. The frame detection circuit operates by examining the incoming data bit stream, detecting A1 and A2 bytes, and counting three consecutive A1 bytes immediately followed by three consecutive A2 bytes. Since the counters recycle upon reaching a three count, the circuit works for both the OC-3 and OC-12 modes.

Abstract: An apparatus which integrates the remote positioning and operation of hand-held tools. The apparatus has a base and an elongated tube which is connected to the base at one of its ends via a pivot. The tube has a spirally grooved interior surface. The other end of the tube is adaptively engaged to a threaded elongated cylinder of similar manufacture to the tube. The cylinder can be screwed or rotated in and out of the tube by the use of a screw turn. While one end of the cylinder is engaged to the tube, the other end is connected to a seat that holds the tool. The tool is held in place on the seat either by seat design or by use of a clamp. The seat-cylinder connection may be modular to permit the seat to be changed as required. The operation of the tool, the pivot and the screw turn are controlled by a power control panel located either on the base or the tube of the apparatus.