- Data Communication Systems, Equipment, and Service
- Fax Service
- Fiber Optics
- Home Automation Systems
- Intercom Systems, Equipment, and Services
- Pagers and Calling Equipment and Service
- Phone Equipment, Systems, and Service
- Radio Communication Equipment and Systems
- Satellite Systems, Equipment, and Service
- Signalization Systems
- Telecommunications Equipment and Supplies
- Wireless Communications
- Wireless and Cell Phone Equipment and Accessories
