Several geographically and culturally diverse partners within AT&T are working as a team to develop new capabilities for the 5ESS® switch in the international marketplace. Throughout this project, participants from organizations in AT&T Bell Laboratories in the United States and AT&T Network Systems International in The Netherlands and the United Kingdom have worked together using a common development process. This paper describes the global teamwork involved in the development of international Integrated Services Digital Network (ISDN) capabilities for the 5ESS switch.