| Business | Phone |
| 2nd Century Communications 100 Ne Loop 410, San Antonio 78216 | (210) 375-7996 |
| All Points Communications Inc 1019 E Nakoma St, San Antonio 78216 | (210) 348-9205 |
| Avaya Inc 814 Arion Pkwy, San Antonio 78216 | (210) 527-3300 |
| Isci Consulting Svc 12023 N Us Highway 281, San Antonio 78216 | (210) 545-4228 |
| Paradigm Associates Inc 8918 Tesoro Dr 590, San Antonio 78217 | (210) 828-4555 |
| Reasonablephone Systems 7800 Ih 10 W 100, San Antonio 78230 | (210) 804-2198 |
| Technical Services Systems 18975 Marbach Ln 1103, San Antonio 78266 | (210) 340-6631 |
| Communication Consultants 16534 Blanco Ky, San Antonio 78247 | (210) 737-0010 |
| Globalscope Communications Crp 301 S Frio St, San Antonio 78207 | (210) 354-2200 |
| Locus Technologies 25123 Boerne Stage Rd, San Antonio 78255 | (210) 698-6455 |
| R A Rankin Assoc 67 Eton Green Cir, San Antonio 78257 | (210) 687-8888 |
| Nii Communications 7823 Marina Dr, San Antonio 78250 | (210) 647-4625 |
| Satellite Communications 4514 S Mccoll Rd, San Antonio 78232 | (210) 545-5771 |
| Usa Communications Inc 25135 Lost Arrow, San Antonio 78258 | (210) 497-7245 |
| Willoughby & Voss 2654 Pebble Breeze, San Antonio 78232 | (210) 525-1111 |