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WG Last Call Issues (5) The ingress PE MUST apply trunk conditioning: Downstream upon detection of AIS or RDI of the TDM trunk Both upstream and downstream on packet loss Reasoning: Similarity with ATM-CES Counter-reasoning: Purely TDM operations should be left to the appropriate NSP ATM-CES lacks the means to carry trunk condition indications across the network Resolution: A PE implementing CESoPSN MAY be capable of applying downstream trunk conditioning as handling of extended TDM indications Capability enabled by local configuration at egress Notes: The CESoPSN PE architecture with an extended NSP is shown in the next slide |