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   ocr: scal arcess andTransoort LocalAtcessand Trasport ATEA(LATA203 AReaLATA)212 - STPS 83 à ar pemncas 308 DC0300 0 Figure 1 Signaling System 7 (SS7)consists of Service: Switching Points (SSPS), which originate or terminate calls; Switching Control Points (SCPS), which offer access to databases; and Switching Transfer Points (STPS), which route SS7 information between SSPS and SCPS. Note the many redundant links, particularly between mated STPS.