Description: This variable indicates the Line Status of the interface. A similar variable is defined in the SONET IETF draft line configuration table as sonetLineStatus. The variable is a bit map represented as a sum, therefore, it can represent multiple defects simultaneously. The sonetLineNoDefect should be set if and only if no other flag is set. The various bit positions are: 1 sonetLineNoDefect 2 sonetLineAIS Line Alarm Indication Signal was detected. Line AIS is asserted when a 111 binary pattern is detected in bits 6,7,8 of the K2 byte for five consecutive frames. 4 sonetLineRDI Line Remote Defect Indication was detected. RDI is asserted when a 110 binary pattern is detected in bits 6,7,8 of the K2 byte for five consecutive frames.