Tactical switching operators are the foundation of wire communications in the Marine Corps. The primary function of personnel holding this designation is to install, operate, and maintain wire/cable networks to link key outposts, control points, and headquarters with reliable paths for the transmission of telephone, facsimile, and data services. Additional responsibilities include installing and performing organizational maintenance on the AN/TTC-62 and AN/TTC-63 tactical telephone centers.

A construction wireman is a Marine holding MOS 0613 performing duties in commercial cable, telephone installation and maintenance. Typical duties include integrating tactical telephone systems with host nation telephone systems, operating unique items of equipment for pole line construction (pole line trucks/series ditcher), mounting commercial hardware and emplacing conduit systems/commercial cable.

The electronic switching operator/maintainer facilitates the installation, operation, restoration, and management of circuits and trunks within the Digital Technical Control (DTC) switchboard. The commercial switch will terminate Integrated Services Digital Network (ISDN), commercial Public Switched Telephone Network (PSTN), and Defense Switched Network (DSN) services, both loops and trunks; and will provide these services into the deployed switch network.

Wire Chiefs design, engineer, and manage the installation, operation, and maintenance of tactical wire/cable networks to link key outposts, control points, and headquarters with reliable paths for the transmission of telephone, facsimile, and data services. Wire chiefs develop a systems approach toward communications, understanding radio and data communications equipment capabilities and systems integration. Typical duties are preparation of circuit diagrams, line route maps, work schedules, switchboard programming, and instruction of wire personnel in wire systems techniques and telephone equipment employment.

Field radio operators employ radio to send and receive messages. Typical duties include the set up and tuning of radio equipment including antennas and power sources; establishing contact with distant stations; processing and logging of messages; making changes to frequencies or cryptographic codes; and maintaining equipment at the first echelon.

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