| Business | Phone |
| Badger Telecom & Sounds 5601 Hammersley Rd, Madison 53711 | (608) 278-1307 |
| Telephone Repair Svc 2881 Commerce Park Dr U, Madison 53719 | (608) 222-2588 |
| Diversified Abilities 601 Elmside Blvd, Madison 53704 | (608) 249-9952 |
| Scharch Electronics Co 1105 Middleton St, Madison 53717 | (608) 831-2266 |
| Slattery Telecom 2780 Ledgemont St, Madison 53711 | (608) 268-0295 |
| Pyramid Telephone & Security 1585 Greenway Cross, Madison 53713 | (608) 273-9300 |
| Inacom Communications 3001 W Beltline Hwy, Madison 53713 | (608) 259-9368 |