Page 776 of 906 NTBK50 2.0 Mb PRI card553-3001-211 Standard 3.00 August 2005The LEDs are described in Table 249.Table 249NTBK50 faceplate LEDs (Part 1 of 2)LED State DefinitionOOS On (Red) The NTBK50 2.0 Mb PRI circuit card is disabled orout-of-service. Also, the state of the card after power-up,completion of self test, and exiting remote loopback.Off The NTBK50 2.0 Mb PRI is not in a disabled state.ACT On (Green) The NTBK50 2.0 Mb PRI circuit card is in an active state.Off The NTBK50 2.0 Mb PRI is in a disabled state. The OOSLED is red.RED On (Red) A red alarm state has been detected. This represents alocal alarm state of Loss of Carrier (LOS), Loss of Frame(LFAS), or Loss of CRC Multiframe (LMAS).Off No red (local) alarm.YEL On (Yellow) A yellow alarm state has been detected. This representsa remote alarm indication from the far end. The alarmmay be either Alarm Indication (AIS) or Remote Alarm(RAI).Off No yellow (remote) alarm.LBK On (Green) 2.0 Mb PRI is in loop-back mode.Off 2.0 Mb PRI is not in loop-back mode.CC On (Red) The clock controller is software disabled.On (Green) The clock controller is enabled and is either locked to areference or is in free run mode.
