Systems and methods for efficiently querying and identifying multiple items on a communication channel are disclosed. In an embodiment implemented in accordance with ATM Adaptation Layer 2, the data related to each session is transported on a channel of the AAL2 virtual circuit. A plurality of jumper cables, each having connectors at opposite cable ends are adapted to mate with any one of the multi-port electrical distribution block ports. This context information is for use by at least one of the processing nodes in the message flow for determining how to process the message. The microcomputer performs a comparison between a time at which the square wave is captured and a time at which the selected square wave signal is captured for diagnosing operation of an input capturing function. The operator assessment value is based upon the vehicle operating data, the operator activity data, the environment data and the operator condition data and is indicative of vehicle operator performance.