Physical description 969Figure 280NTBK50 2.0 Mb PRI card with daughterboardsThe LEDs are described in Table 402 "NTBK50 faceplate LEDs" (page 969).Table 402NTBK50 faceplate LEDsLED State DefinitionOOS On (Red) The NTBK50 2.0 Mb PRI circuit card is disabled or out-of-service.Also, the state of the card after power-up, completion of self test, andexiting 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 OOS LED is red.Nortel Communication Server 1000Circuit Card ReferenceNN43001-311 01.04 StandardRelease 5.0 23 May 2008Copyright © 2003-2008, Nortel Networks.