| Business | Phone |
| Alcatel Inc 3400 W Plano Pkwy, Plano 75075 | (972) 943-9445 |
| A T & T 5976 W Parker Rd, Plano 75093 | (972) 778-2000 |
| Global Communication Tech 2420 Flagstone Dr, Plano 75075 | (972) 620-1670 |
| Netensity Inc 6504 International Pkwy, Plano 75093 | (972) 267-5179 |
| Epygi Technologies Ltd 6900 Dallas Pkwy 850, Plano 75024 | (972) 692-1166 |
| Genesys Telecommunications 3525 Burnet Dr, Plano 75025 | (972) 712-6479 |
| Tsi & C Inc 7309 Springfield Dr, Plano 75025 | (972) 527-6199 |
| Alcatel Usa 1000 Coit Rd, Plano 75075 | (972) 612-2631 |
| Alcatel Usa 1700 Summit Ave, Plano 75074 | (972) 423-8613 |
| Alcatel Usa 2900 W Plano Pkwy, Plano 75075 | (972) 964-7830 |
| Alcatel Usa 4100 Creekstone Dr, Plano 75093 | (972) 964-9301 |
| Alcatel Usa 809 Snapdragon Ln, Plano 75075 | (972) 509-1995 |
| Bisatel 4645 Parnell Ln, Plano 75024 | (972) 943-0164 |
| Lucent Technologies 600 Accent Dr, Plano 75075 | (972) 633-5805 |
| Masergy Communications 2740 N Dallas Pkwy 260, Plano 75093 | (214) 442-5700 |
| Mas Tec 2716 S Rigsbee Dr, Plano 75074 | (972) 509-5858 |
| Metro Tel 3001 Communications Pkwy #2002, Plano 75093 | (972) 403-1424 |
| Nortel Networks 3504 O Malley Ct, Plano 75023 | (972) 208-5453 |
| North American Communications 555 Republic Dr, Plano 75074 | (972) 546-1700 |
| Platinum Glass Corp 2805 E Plano Pkwy 300, Plano 75074 | (972) 633-9559 |
| Xalted Networks 901 Jupiter Rd, Plano 75074 | (972) 801-5570 |
| Tts Business Svc 901 Jupiter Rd, Plano 75074 | (817) 589-2025 |
| Verizon 641 W Plano Pkwy 307, Plano 75075 | (972) 516-0888 |
| Telegate Inc 4949 Hedgcoxe Rd, Plano 75024 | (972) 334-9951 |
| Smart Trust 5800 Granite Pkwy 300, Plano 75024 | (972) 731-2685 |