| Business | Phone |
| Gi-Tech 10221 Centrepark Dr, Houston 77043 | (832) 242-3055 |
| Sudecom 1511 Bingle Rd D8, Houston 77055 | (713) 461-4305 |
| Toshiba Phone Systems 5901 Westheimer Rd R, Houston 77057 | (281) 978-7464 |
| Connex Services Inc 6121 Fm 1960 Rd W, Houston 77069 | (281) 440-6767 |
| Telephone Service & Supply Co Houston 77070 | (281) 807-7575 |
| Philip Bush Comms 2302 Carleen Rd, Houston 77018 | (713) 688-0722 |
| Telephone Technicians Inc 419 W 31st St, Houston 77018 | (713) 868-2263 |
| One Connection 12730 Newbrook Dr, Houston 77072 | (281) 495-0200 |
| Professional Fone Management 2722 Ashford Trail Dr, Houston 77082 | (281) 493-3287 |