561220010L2-5, Issue 361220010L2-5CLED IndicationThe IDSL OCU-R front panel LEDs display theoperating status. The LEDs are described in Table 5.4. TESTINGLoopback TestingLoopback tests can be performed from the CentralOffice (CO) to verify proper loop and IDSL OCU-Roperation. The IDSL OCU-R provides a networkloopback in response to an OCU latching or non-latching loopback command. The IDSL OCU-R alsoprovides a sealing current reversal when the CSUloopback command is detected. Alternatingloopbacks may be performed at all rates, except 64kbps Clear Channel. See Table 6 for alternatingloopback sequences. See Table 7 for latching loopbacksequences.Table 7. Latching Loopback SequencesecneuqeSnoitcnuF noitcnuF noitcnuF noitcnuF noitcnuF edoCetyBforebmuNdevieceR devieceR devieceR devieceR devieceRsetyB setyB setyB setyB setyBgnitsixeraelCskcabpoolotecivedyfitnedIdepooleb;pooloteraperPedocPAMdnessetyb03retfaetavitcAkcabpoolninoitisnarT)PIT(ssergorp0101110XtceleskcabpooL)CSL(edoc0SD-1010000XUCO-1010101XUSC-1000110XdelbanekcabpooL)EBL(0110101XeciovdnE-raF)VEF(0101101XfomuminiMsetybPIT53fomuminiMsetybCSL53fomuminiMsetybEBL001fomuminiMsetybVEF23dehsilbatseelbasidotderiuqersetybPIT53fomuminiM.kcabpoolgnihctaltiberaCt'noD=XTable 6. Alternating Loopback SequencesecneuqeSnoitcnuF noitcnuF noitcnuF noitcnuF noitcnuF setyBdevieceRkcabpooletavitcAdnakcabpoolniatniaMsrorretibroftsetkcabpoolraelCfosetybevitucesnocruoFedockcabpooldeificepsUCO-0101010XUSC-0001010XUSD-0011010XhtiwgnitanretlaetybataDedockcabpool:elpmaxe0101010X/1DDDDDDXsetybatadevitucesnocruoFedockcabpoolUSCtuohtiwtiberact'noD=XDEL roloC noitpircseDCNYS DERNEERG.cnyskrowtenonsierehttahtsetacidnI.noitazinorhcnyskrowtensetacidnICRC DER .srorreCRCeraerehttahtsetacidniNO.srorreCRConsetacidniFFOUSDON WOLLEY gnilaeson,langisonsetacidniNO.gnimarfCSon,tnerrucdna,tnerrucgnilaes,langissetacidniFFO.deveihcagnimarfCSPA NEERG neebsahtinuehttahtsetacidniNO.denoisivorpyletomerknillortnocetomersetacidniGNIHSALF.evitcadenoisivorpyllacolsetacidniFFO.noitarepoKBLKWTN WOLLEY ehtsdrawotkcabpoolasetacidniNOSDDs'TRtadekovnisikrowtentseTotesnopserniecafretniremotsuC.kcabpoolUCOgniussiretneCdrawotkcabpoolsetacidniGNIHSALFaivUSD/USCtadekovnisikrowtendna,kcabpoolUSCdednammockrowtentnerrucgnilaesgnisreverfoesnopsers'TR.USD/USCotKBLTSUC WOLLEY ehtsdrawotkcabpoolasetacidniNOR-UCOLSDItadekovnisiremotsuc.nottubKBLlenaptnorfaivecafretnisdrawotkcabpoolasetacidniGNIHSALFNARTDAehttadekovnisiremotsucehtlenaptnorfR-UCOLSDIaivET1RB-U.nottubKBLTable 5. LED Indication