1. ROI Telephony 4951 Airport Pkwy Ste 660, Addison, TX 75001 Coordinate: 32.96618,-96.82683 Phone: (214) 364-2425
2. Intecom 5057 Keller Springs Rd, Addison, TX 75001 Coordinate: 32.97011,-96.82373 Phone: (214) 447-9000