| Business | Phone |
| Graybill Communications 600 Old Marion Rd Ne, Cedar Rapids 52402 | (319) 378-7485 |
| Structured Cabling Specialist 225 K Ave Nw D, Cedar Rapids 52405 | (319) 396-5466 |
| R P Communications 2351 Blairs Ferry Rd Ne, Cedar Rapids 52402 | (319) 294-2169 |