the logical model mapping. Using a standard information model is required for system interoperability. Ease of integration is a must in telecom management space where multiple oper- ation support solutions interoperate to manage the operations in the Telco. The information models can be mapped to business process and applications where it needs to be used. In short, use of standard information models is mandatory in next generation telecom management solutions. After a brief overview of what an information model is expected to achieve, this chapter explains the basic concepts of the two most popular information models. Additional Reading 1. www.tmforum.org Latest release of the following documents can be downloaded from the Web site GB922 and GB926: SID Solution Suite GB932 and GB933: CIM-SID Suite 2. John P. Reilly. Getting Started with the SID: A Data Modeler's Guide. Morristown, NJ: TeleManagement Forum, 2009. 3. Distributed Management Task Force (DMTF) CIM Tutorial at: www.wbemsolutions com/tutorials/CIM/ 4. Chris Hobbs. A Practical Approach to WBEM/CIM Management. Boca Raton, FL: CRC Press, 2004. 5. John W. Sweitzer, Patrick Thompson, Andrea R. Westerinen, Raymond C. Williams, and Winston Bumpus. Common Information Model: Implementing the Object Model for Enterprise Management. New York: John Wiley & Sons, 1999. Chapter 25 Standard Interfaces This chapter is about OSS interfaces for interaction. Two of the most popular information models in telecom domain, Multi-Technology Operations System Interface (MTOSI) and OSS through Java Initiative (OSS/J) are discussed in this chapter. How these two standards can complement each other is also covered in this chapter. 25.1 Introduction There are multiple operation support systems currently available in the telecom market. In a service provider space, multiple OSS solutions need to interoperate seamlessly to reduce operational costs and improve operational efficiency. To make this possible the interfaces for interaction need to be standardized. Most OSS solu- tion dev