185.0 OPERATIONWhen the Model 2701 has been properly configured and installed, itshould operate transparently. This sections describes power-up, LEDstatus monitors, and the built-in loopback test modes.5.1 POWER-UPBefore applying power to the Model 2701, please read ìPower Connec-tionî on page 16 and verify that the unit is properly connected to theappropriate power source.5.2 LED STATUS MONITORSThe Model 2701 features six front panel LEDs that monitor connectionson the G.703/G.704 and signaling, error and test modes. Figure 6 showsthe front panel location of each LED. Descriptions of each LED followFigure 6.Figure 6. 2701 Front PanelsE1 Link(Active Green) Solid green (On) indicates that the end to end E1Link is up, signifying that the link is active. The E1 Link LED isOff when the link is down.