12 Chapter 12. Implementing the IMS sample service This chapter provides detailed descriptions for the development of FindHelp , the sample IMS service implemented in this redbook. It includes the development of the SIP Servlet for the FindHelp Service, the creation of the BPEL process using WebSphere Integration Developer and a location simulator which acts as a Location server. This chapter contains the following: Implementation overview SIP Servlet development BPEL development The location simulator © Copyright IBM Corp. 2007. All rights reserved. 341