Description: The number of SIP L3_PDUs that were discarded because an explicit carrier (CIC code) was selected in the Carrier Selection field of the Header Extension of an SIP L3_PDU and the Destination Address was structured as an embodied Service Access Code (SAC) plus the number of SIP L3_PDUs that were discarded because of an unauthorized carrier (CIC) was selected plus the number of SIP L3_PDUs that were discarded because they contained an explicit Carrier Selection element (CIC code) that the SMDS SS did not recognize. The CIC may be a valid code for SMDS. However, this SMDS SS that is serving this SNI is not connected to that carrier or does not recognize the code specified. In some jurisdictions not all carriers are authorized to provide exchange service. Hence, if the carrier selection field contains a carrier's CIC code

(i.e., an explicit carrier selection has been made) and that carrier is not authorized to provide service between destination and source addresses within the exchange service area, then the SIP L3_PDU will be discarded. See TR-TSV- 001060.