| Business | Phone |
| Avaya Inc 129 S Phelps Ave, Rockford 61108 | (815) 398-3905 |
| Tele Max 635 Chapin Ct, Rockford 61107 | (815) 489-0513 |
| Telecom Technologies 834 N Church St, Rockford 61103 | (815) 963-5334 |
| Psm Paytel 728 N Prospect St, Rockford 61107 | (815) 965-8661 |
| Lexxon Networks Inc 129 S Phelps Ave, Rockford 61108 | (815) 395-6720 |