DSP Communications, Inc. develops baseband chip sets and products for wireless personal communications service. The company develops, markets, licenses and supports application-specific integrated circuits and digital signal processing (DSP) software for a variety of cellular and PCS applications. Through its subsidiary, CTP Systems, Ltd., the company also manufactures and sells wireless private branch exchange ("PBX") for wireless local loop applications and offices. The company conducts its operations principally in the United States and Japan. During 1998, the company acquired Isotel Research Ltd. through Isotel Corp, a wholly-owned Canadian subsidiary of the company. Baseband chip sets accounted for 97% of 1998 revenues and technology development, 3%.