The number belongs to RSI Enterprises. I called the number after hours and was asked by an automated voice to leave a message on the voicemail system. I believe it is a collection agency because there was absolutely no information in the voicemail greeting that described the nature of the business...just "You have reached RSI Enterprises, please leave a voicemail message after the tone".
RSI Enterprises, Inc.
Phone: (602) 263-4000
Fax: (602) 627-2122
View Additional Phone Numbers
5440 W. Northern Avenue, Glendale, AZ 85301
http://www.rsico.com