UDP is a leader in the field of telecommunications billing, order management and customer service solutions. Its customer s look to UDP to be a source for billing and order management systems, including end-user billing, carrier access billing and message processing for incumbent and competitive local carriers, interexchange carriers, wireless, cable TV and Internet. The company has state-of-the-art systems and unmatched industry expertise. Headquartered in San Antonio, Texas, UDP has been serving clients since 1964 and has a strong and stable background.