Applies to establishments engaged in providing telecommunications services which enable subscribers to converse or transmit coded data. Work contemplated by this classification includes, but is not limited to, the regular installation, maintenance and repair of machinery and equipment, the extension and maintenance of lines (including poles, towers and underground lines), clearing right of ways, installing telephones and wiring in buildings, and making service connections when done by employees of an employer having operations subject to this classification. Machinery and equipment includes, but is not limited to, central control and switching center equipment, relays, computers, antennae, cranes, forklifts, vehicles and garages, warehouse equipment, and hand tools.

This classification excludes clerical office, exchange operators and administrative personnel who are to be reported separately in classification 1304; contractors engaged in underground line construction maintenance or repair who are to be reported separately in classification 0107; contractors engaged in overhead line, pole, and tower construction, maintenance or repair, who are to be reported separately in classification 0509; contractors engaged in wiring within buildings and making pole-to-house hook-ups who are to be reported separately in classification 0608; contractors engaged in the installation or contract maintenance of machinery or equipment who are to be reported separately in classification 0603; and establishments primarily engaged in selling telephone equipment retail which are to be reported separately in classification 6411.

Applies to establishments engaged in providing telecommunication services which enable printed messages (telegrams) to be transmitted from one agent to another for receipt by, or delivery to, a designated party. Telegraph companies also provide a "moneygram" service which allows an agent to receive a sum of money at one location and transmit a message to another agent to pay out the same amount of money to a designated party at another location. Work contemplated by this classification includes the regular installation, maintenance and repair of machinery and equipment, the extension and maintenance of lines (including poles, towers and underground lines), installing transmission and receiving equipment, the clearing of right of ways, and delivery work when done by employees of an employer having operations subject to this classification. Machinery and equipment includes, but is not limited to, cables, control panels, poles, lines, relays, computers, cranes, forklifts, vehicles and garages, warehouse equipment, and hand tools.

This classification excludes clerical office and administrative personnel who are to be reported separately in classification 1304; contractors engaged in underground line construction maintenance or repair who are to be reported separately in classification 0107; contractors engaged in overhead line, pole, and tower construction, maintenance or repair, who are to be reported separately in classification 0509; contractors engaged in wiring within buildings who are to be reported separately in classification 0608; and contractors engaged in the installation or contract maintenance of machinery or equipment who are to be reported separately in classification 0603.