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Home My WebLink About20020927Craig Exhibit 502.pdf1 Qwest Signaling Network Third Party Signaling Network National Signaling Network Qwest Switch SSP Qwest Switch SSP A Link B LinkA Links Qwest Databases (800, 866, 877, LIDB, CNAM, LNP, AIN) STP SCP B Link Third Party Customer SSP STP SCP National SS7 Network (e.g., ILECs, ICO, IXCs, CLECs) A Links A Links Third Party Databases Qwest STP Pair Third Party STP Pair Exhibit No. 502 Case No. QWE-T-02-11 Craig, Joe (Direct)--Qwest September 27, 2002SSP: Service Switching Point STP: Signaling Transfer Point SCP: Service Control Point A Link: An "A" (access) link connects a signaling end point (e.g., an SCP or SSP) to an STP. B Link: A "B" (bridge) link connects an STP to another STP at same hierarchy level (i.e., STP to STP).