- Voice Response Technologies, Inc. 5717 E. Justine Rd. Scottsdale, AZ 85254 (602)923-1397 (Voice) (602)996-0376 (Fax and Voice Mail) info@vrtinc.com (email) Voice Response Technologies, Inc. specializes in Integrated Voice Response (IVR/VRU) application system development to provide the link between a phone line and a data base to allow a caller access to personalized data. Telephone call centers ...www.vrtinc.com