| Business | Phone |
| Action Fax 8700 Pena Blvd, Denver 80249 | (303) 342-0506 |
| Dex Business Systems Inc 8333 Greenwood Blvd, Denver 80221 | (303) 427-1425 |
| Muratec Facsimile Systems 4705 Kingston St, Denver 80239 | (303) 375-1648 |
| Network Equipment Systems 700 W Mississippi Ave, Denver 80223 | (303) 799-5199 |