| Business | Phone |
| Qattan Electronics 1354 8th St Sw, Roanoke 24015 | (540) 345-6602 |
| Telgraphic Systems Inc 5720 Williamson Rd 102, Roanoke 24012 | (540) 563-8014 |
| Valcom Llc 5614 Hollins Rd, Roanoke 24019 | (540) 563-2000 |
| Sun Com 3024 Barkley Ave Nw, Roanoke 24012 | (540) 563-5074 |
| Dial Technologies 152 Brookfield Ln, Roanoke 24012 | (540) 977-2931 |
| Networking Solutions 5338 Peters Creek Rd A, Roanoke 24019 | (540) 265-7670 |