| Business | Phone |
| Controlled Systems Inc 1209 Executive Dr E, Richardson 75081 | (972) 234-6767 |
| X P Svc 401 S Sherman St, Richardson 75081 | (972) 808-0951 |
| Secure Options Monitoring 851 International Pkwy 181, Richardson 75081 | (972) 235-2250 |
| C Tap 2350 Campbell Creek Blvd, Richardson 75082 | (972) 234-9991 |
| Adi Instruments Inc 901 Waterfall Way, Richardson 75080 | (972) 644-2244 |
| Abbott Security 851 International Pkwy 181, Richardson 75081 | (972) 231-5106 |
| Pioneer Standard Electronics 959 E Collins Blvd, Richardson 75081 | (972) 808-1900 |
| Security & Investigations Grp 1910 Firman Dr, Richardson 75081 | (972) 497-9200 |
| Security Concepts 254 E Arapaho Rd 180, Richardson 75081 | (972) 644-1939 |
| Test Technology 870 N Dorothy Dr 700, Richardson 75081 | (214) 242-0561 |
| Omicron Controls Inc Po Box 852005, Richardson 75085 | (214) 761-9211 |