| Business | Phone |
| Accucom Inc 990 N Bowser Rd 840, Richardson 75081 | (972) 238-7502 |
| Adc 670 International Pkwy, Richardson 75081 | (972) 994-0200 |
| Alliance Communication 1750 N Collins Blvd, Richardson 75080 | (972) 238-7969 |
| Aerotek Training Ctr 1174 Commerce Dr, Richardson 75081 | (972) 644-7461 |
| Award Solutions Inc 1200 E Collins Blvd, Richardson 75081 | (972) 664-0727 |
| Cyote Technologies 601 N Glenville Dr, Richardson 75081 | (972) 671-2611 |
| Dgi Technologies Inc 1810 N Glenville Dr, Richardson 75081 | (972) 644-7444 |
| Diamondback International 801 E Campbell Rd, Richardson 75081 | (972) 671-2400 |
| Eagle Network Svc Inc 1114 Ridgeway Cir, Richardson 75080 | (972) 235-7335 |
| Etherair Telecommunications 1651 N Collins Blvd, Richardson 75080 | (972) 234-8940 |
| Exi-Parson Telecom 715 N Glenville Dr, Richardson 75081 | (972) 231-9438 |
| Fcnp Svc 1475 Richardson Dr, Richardson 75080 | (972) 231-7727 |
| First Telecom Of Texas Inc 401 S Sherman St, Richardson 75081 | (972) 994-9699 |
| Fonet Global 740 E Campbell Rd, Richardson 75081 | (972) 644-6040 |
| Gt Telecom 705 N Bowser Rd, Richardson 75081 | (972) 699-1886 |
| Integrated Telecom Solutions 1180 Commerce Dr, Richardson 75081 | (972) 664-0711 |
| Intelect Technologies Inc 1225 Commerce Dr, Richardson 75081 | (972) 367-2100 |
| Cit 675 N Glenville Dr 135, Richardson 75081 | (972) 997-1600 |
| Mahi Networks 1212 E Arapaho Rd, Richardson 75081 | (214) 210-1216 |
| New Class Five Inc 1239 N Glenville Dr, Richardson 75081 | (972) 234-6414 |
| Ntt America Inc 2435 N Central Expy 1200, Richardson 75080 | (214) 712-7373 |
| Oblio Telecom Inc 407 International Pkwy 403, Richardson 75081 | (972) 470-9100 |
| Ohio Telecomm Inc 1750 N Collins Blvd, Richardson 75080 | (972) 644-4891 |
| Oscilloquartz 1323 Columbia Dr, Richardson 75081 | (972) 437-3525 |
| Servcom 101 W Main St, Richardson 75081 | (972) 644-1896 |
| Velocita Wireless 258 E Arapaho Rd, Richardson 75081 | (972) 669-7750 |
| Spectra Site Communications 1701 N Greenville Ave # 502, Richardson 75081 | (214) 837-3094 |
| Superwire Inc 2929 N Central Expy 260, Richardson 75080 | (214) 432-1999 |
| Talx Corp Fastime Ops 3400 Waterview Pkwy, Richardson 75080 | (972) 764-1000 |
| Techni Logic Communications 959 E Collins Blvd 120, Richardson 75081 | (972) 455-5500 |
| Telcogray Distribution & Intgr 1354 Exchange Dr, Richardson 75081 | (972) 671-9740 |
| Telecom Network Specialist 655 N Glenville Dr, Richardson 75081 | (469) 385-3900 |
| Tic 997 Hampshire Ln 100, Richardson 75080 | (972) 699-1111 |
| Tellabs Inc 501 President George Bush Hwy, Richardson 75080 | (972) 671-2036 |
| Teloptica 1201 Richardson Dr 205, Richardson 75080 | (214) 575-6100 |
| Transglobal Telecom Inc 1202 E Arapaho Rd, Richardson 75081 | (972) 808-0700 |
| Xtel Technical Svc Inc 705 N Bowser Rd, Richardson 75081 | (214) 739-1651 |
| Adc 2240 Campbell Creek Blvd, Richardson 75082 | (972) 669-1451 |
| Diginet Plus 3021 Holford Rd, Richardson 75082 | (972) 898-6718 |
| Lucent Technologies 5611 New Castle Dr, Richardson 75082 | (972) 783-1439 |
| Nortel Networks 2301 N Greenville Ave 3, Richardson 75082 | (972) 362-3900 |
| Novacom Services 3208 Stonehenge Dr, Richardson 75082 | (972) 896-1184 |
| Samsung Telecom America 1301 E Lookout Dr, Richardson 75082 | (972) 907-9090 |