- Carrier equipment (i.e., analog, digital), telephone, manufacturing
- Central office and switching equipment, telephone, manufacturing
- Communications headgear, telephone, manufacturing
- Cordless telephones (except cellular) manufacturing
- Data communications equipment (e.g., bridges, gateways, routers) manufacturing
- Facsimile equipment, standalone, manufacturing
- Keysets, telephone, manufacturing
- Local area network (LAN) communications equipment (e.g., bridges, gateways, routers) manufacturing
- Modems, carrier equipment, manufacturing
- Multiplex equipment, telephone, manufacturing
- PBX (private branch exchange) equipment manufacturing
- Private branch exchange (PBX) equipment manufacturing
- Repeater and transceiver equipment, carrier line, manufacturing
- Subscriber loop equipment, telephone, manufacturing
- Switching equipment, telephone, manufacturing
- Telephone answering machines manufacturing
- Telephone carrier line equipment manufacturing
- Telephone carrier switching equipment manufacturing
- Telephones (except cellular telephone) manufacturing
- Telephones, coin-operated, manufacturing
- Toll switching equipment, telephone, manufacturing
- Wide area network communications equipment (e.g., bridges, gateways, routers) manufacturing
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