Air Brakes and Train Handling Rules - Alaska Railroad

68 EOT Telemetry DevicesThe RF NOCOM message will remain displayed until the selectedEOT unit sends a valid transmission. After the RF NOCOM alarmcondition has cleared, the next radio transmission received by theLCU will remove the alarm message from the message display andallow normal operation to resume.D. Front-To-Rear Communications FailureOne of these two conditions causes a front-to-rear communicationsfailure alarm:• The EOT sends no confirming message 15 seconds after theEMERGENCY SWITCH has been activated.or• The EOT sends no confirming message for 6 minutes 30 secondsafter an automatic communication test from the LCU.When either of the above situations occurs, the LCU will:1. Sound an alarm for 5 seconds.2. Display the FR NOCOM alarm message on the message displaywindow.The FR NOCOM message will remain until front-to-rear communicationsare restored or a higher priority message overrides the alarmmessage.The FR NOCOM message will be removed if a confirming messageis received after:• The COMMUNICATIONS TEST/ARM button is operated.• A response is received to an automatic communications poll theLCU initiated.E. Replace BatterySee Rule 68.3.1D, Battery Status Displays.F. Pressure DisplaySee Rule 68.3.1B, Pressure Display.68-10 ARRC Air Brakes and Train Handling Manual June 1, 1996