| Business | Phone |
| Advent Telecom 2510 Southwell Rd 102, Dallas 75229 | (972) 484-2800 |
| Dnr Communications 9450 Skillman St 106, Dallas 75243 | (214) 340-4306 |
| Executive Telephony Inc 1309 Worthington Dr, Dallas 75240 | (972) 233-2287 |
| Moore Telecommunications 13500 Midway Rd 402, Dallas 75244 | (972) 241-7171 |
| Radcom Technologies Inc 9221 Lyndon B Johnson Fwy, Dallas 75243 | (972) 744-2000 |
| Tanis Communications Inc 5420 Lyndon B Johnson Fwy, Dallas 75240 | (972) 233-0150 |
| Commercial Voice & Data 2824 Valley View Ln 105, Dallas 75234 | (972) 852-3000 |
| Communication World Of Dallas 2636 Walnut Hill Ln 202, Dallas 75229 | (214) 350-3494 |
| Crosstalk Communications 2723 Valley View Ln, Dallas 75234 | (214) 528-4447 |
| Drake Communications Inc 2435 Squire Pl 400, Dallas 75234 | (214) 243-2500 |
| Great Plain Telecom Inc 10106 Technology Blvd W, Dallas 75220 | (972) 381-8600 |
| Intellicall 3210 Belt Line Rd, Dallas 75234 | (469) 522-1553 |
| Interwest Communications 2152 W Northwest Hwy # 122, Dallas 75220 | (972) 869-1371 |
| Advanced Communications Dallas 75207 | (214) 850-5554 |
| National Telesystems Inc 10525 Newkirk St 220, Dallas 75220 | (214) 352-5000 |
| Eagle Network Svc Inc 915 Dragon St, Dallas 75207 | (214) 747-8018 |
| Sparus Corp 10205 N Walton Walker Blvd, Dallas 75220 | (214) 393-1900 |
| Fujitsu Business Communication 15770 Dallas Pkwy, Dallas 75248 | (972) 855-1850 |
| Trca Telephone Data Systems 12801 N Stemmons Fwy, Dallas 75234 | (972) 277-8660 |
| 2001 & Beyond Communications 3737 High Vista Dr, Dallas 75244 | (214) 350-9049 |
| All-Tech Communications 10840 Switzer Ave 101, Dallas 75238 | (214) 340-5092 |
| Big D Communication Products 10209 Plano Rd 103, Dallas 75238 | (214) 349-6044 |
| Bradley Communications 2725 Lockhart Ave, Dallas 75228 | (214) 826-1524 |
| North Texas Custom Phones Dallas 75219 | (214) 526-7885 |
| Pace Communications Inc 5724 Harvest Hill Rd, Dallas 75230 | (972) 387-3255 |
| Public Pay Phone Systems 4114 Avondale Ave, Dallas 75219 | (214) 521-0035 |
| Communications Unlimited 10990 Switzer Ave 201, Dallas 75238 | (214) 340-6001 |
| Communications Usa 4099 Mcewen Rd, Dallas 75244 | (972) 233-7707 |
| Comptel Communications 14290 Gillis Rd A, Dallas 75244 | (972) 980-1012 |
| Sierent Solutions 3878 Oak Lawn Ave 400, Dallas 75219 | (214) 559-9841 |
| D'Tel Communications 4885 Alpha Rd 135, Dallas 75244 | (972) 490-0120 |
| Xeta Technologies Inc 2730 N Stemmons Fwy, Dallas 75207 | (214) 678-0909 |
| Executive Telecom & Data Svc 8617 Ambassador Row, Dallas 75247 | (214) 741-3837 |
| Ics Communication 13604 Midway Rd 159, Dallas 75244 | (972) 386-5302 |
| Ics Telephones 1207 Round Table Dr, Dallas 75247 | (214) 351-0844 |
| Itt Of Dallas 4124 Willow Ridge Dr, Dallas 75244 | (972) 241-8150 |
| Mercury Communication Svc Inc 1283 Record Crossing Rd, Dallas 75235 | (214) 637-4900 |
| Metro-Net Inc 4262 Spring Valley Rd, Dallas 75244 | (972) 960-8885 |
| North Central Communications 14305 Inwood Rd, Dallas 75244 | (972) 392-5300 |
| Performance Telecom Solutions 818 Cedar Hill Ave, Dallas 75208 | (214) 948-3161 |
| Quality Telephone 301 N Market St, Dallas 75202 | (214) 746-6363 |
| Shoreline Communications 15301 Spectrum Dr, Dallas 75254 | (972) 763-2250 |
| Tele Resource Corp 1215 Viceroy Dr, Dallas 75247 | (214) 905-1700 |
| Torres Services 2510 Southwell Rd, Dallas 75229 | (972) 484-2134 |
| Frontier Computer Corp 4025 Bronze Way, Dallas 75237 | (214) 330-3330 |
| Frontier Computer Corp 4929 Browns Way, Dallas 75237 | (214) 330-3300 |
| Smartfone 4353 Gannon Ln 114, Dallas 75237 | (972) 296-2966 |
| Voicecom Systems Inc 18790 Lloyd Dr, Dallas 75252 | (972) 250-1008 |