THIS MOS IS NO LONGER ASSIGNED
This is an entry level MOS for TRI-Tac Switch systems; Typical duties are the use of a maintenance panel or test equipment to check switching system status, replacement of inoperative components or parts, and interconnection of electronic switching systems with other communication elements; Electronic switching equipment technicians must understand programming codes to establish system modes of operation or to execute diagnostic routines; With additional training, these Marines are also capable of maintaining fixed plant digital switching equipment; MOS 2891, Electronics Maintenance Chief, is assigned upon promotion to Master Sergeant.