intro_to_ss7An Introduction to SS7By Guy Redmill, SS7 Product ManagerJuly 2001white paperTable of ContentsABSTRACT ..........................................................................................................................4 1 2 INTRODUCTION..........................................................................................................4 BACKGROUND AND HISTORICAL PERSPECTIVE ......................................................4 Figure 2.1: In Band Signaling: CAS..................................................................5 Figure 2.2: Out of Band Signaling: CCS ..........................................................5 3 PRINCIPLES OF SS7 SIGNALING: THE SIGNALING LINK ............................................5 Figure 3.1: Overview of SS7 Stack ................……