| Business | Phone |
| Mundotel 1515 S Mcdonald St, Mckinney 75069 | (972) 562-9674 |
| Commtech Sales 192 Industrial Blvd, Mckinney 75069 | (972) 562-0555 |
| Lucent Technologies 115 Industrial Blvd B, Mckinney 75069 | (972) 562-1621 |
| Mci 202 W Louisiana St, Mckinney 75069 | (972) 542-0057 |