Description: Specifies the monitor point for the ODUk Path non-intrusive monitoring function. The value source(2) is not allowed if the corresponding instance of jnxoptIfODUkDirectionality has the value sink(1), and the value sink(1) is not allowed if the corresponding instance of jnxoptIfODUkDirectionality has the value source(2). Either the value sink(1) or source(2) is allowed if the corresponding instance of jnxoptIfODUkDirectionality has the value bidirectional(3). The value sink(1) means monitoring at the sink direction path signal of the ODUk CTP. The value source(2) means monitoring at the source direction path signal of the ODUk CTP. Monitoring the source direction of an ODUk CTP is necessary in those cases where the ODUk CTP is at an SNCP (Subnetwork Connection Protection) end (e.g., see Figure I.1.2/G.874.1). If one would like to get the performance of the protected connection, one cannot use the NIM function at both ODUk CTP sinks (before the matrix), instead one should monitor the signal at the source ODUk CTP after the matrix.