Chapter 3. Operation3-2 TSU User Manual 61200060L1-1Front Panel OperationFigure 3-1. Front Panel LayoutItem FunctionDisplays:1 PWR: LED "ON" when power is received by TSU.2 ERR: LED "ON" when errored events have happened in thelast second.3 ALM LED "ON" when an alarm condition exists.4 LB LED "ON" when unit is in loopback.5 TD LED "ON" when DTE data is being transmitted.6 RD LED "ON" when DTE data is being received.7 RS LED "ON" when RTS active from DTE.8 CS LED "ON" when TSU has CTS active toward DTE.9 LCD WINDOW A 2X16 Liquid Crystal Display (LCD) window that dis-plays menu items used in configuration and displaysinformation useful in monitoring the unit.Operation Keys:10 UP/DOWN ScrollKeysScroll keys used to traverse up/down menu trees, in-crease/decrease numeric values and scroll throughselections.11 ENTER Used to choose paths and make selections.12 CANCEL Used to exit selections or menu tree branches.TSUPWR ERR ALM LBTD RD RS CS SCROLLENTERCANCEL13111210987654321
