The group's principal activities are to design, develop and manufacture products for satellite, terrestrial voice, video and data telecommunications. The group operates in four segments: commercial communications segment consists of time and frequency control products used in satellites and terrestrial cellular telephone or other ground-based telecommunications. Us government segment consists of time and frequency control products used in terrestrial and space applications by the defense department and other us government agencies. Gillam-fei segment consists of wireline synchronization and network monitoring systems. Fei-zyfer segment provides global positioning system (gps) technologies into systems and subsystems for secure communications in government, commercial and other locator applications. Customers of the group include motorola corporation and space systems loral. On 09-May-2003, the group acquired zyfer,inc.
