Profile: Communications Mfg. Co. designs, manufactures, customizes and supports data communication products for industrial and commercial fields. Our product line includes central office test equipment, central office tools & supplies, and outside plant tools test equipment. Our CMC 5200-L1 LineChek III is a microprocessor-controlled test cabinet used for subscriber line testing from the central office or remote location. The CMC 5200-L1 LineChek III features basic voltmeter testing, LCD display of dialed D3digits, internal power supply, and external test equipment jacks. Our CMC 7910DY series DataStar 3000 is a hand-held, microprocessor-controlled battery-powered, technician computer. Our DataStar 3000 integrates next generation technology, ruggedized packaging and low-power components to make field computing practical for telephone technicians. It is featured with 133 MHz 586 processor, 133 MHz 586 processor, 6 MB RAM and with 24MB ATA flash card. We provide replacement for defective unit.