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SS7 Recommendations (cont.) R-2. Preserve the CSN (international and /or national) ETS call marking(s) and associated SS7 congestion priorities in the SS7 messages from SG to MGC Meets [ETS Tel Req] #3 “Telephony signaling labels should have a mapping with the various emergency-related markings … used in …the PSTN” E.g., in the U.S.A. the NSEP codepoint in the Calling Party Category (CPC) and, if present, the optional Precedence parameter R-3. Preserve the IP network (international and /or national) ETS call marking(s) and associated congestion priorities in the call setup IAM from the IP network to the CSN Preserves the ETS labeling into the destination network |