Dallas县，TX的NEC公司的电话通讯公司（无线电除外）

Telvista, Inc.

1605 Lyndon B Johnson Fwy, Dallas, TX 75234

Telscape Communications, Inc.

10440 N Central Expy, Dallas, TX 75231

Cisco-Navini Networks LLC

2240 Campbell Creek Blvd, Richardson, TX 75082

Nations Access, LLC

15455 Dallas Pkwy, Addison, TX 75001