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561220010L2-5, Issue 361220010L2-5C
LED Indication
The IDSL OCU-R front panel LEDs display the
operating status. The LEDs are described in Table 5.
4. TESTING
Loopback Testing
Loopback tests can be performed from the Central
Office (CO) to verify proper loop and IDSL OCU-R
operation. The IDSL OCU-R provides a network
loopback in response to an OCU latching or non-
latching loopback command. The IDSL OCU-R also
provides a sealing current reversal when the CSU
loopback command is detected. Alternating
loopbacks may be performed at all rates, except 64
kbps Clear Channel. See Table 6 for alternating
loopback sequences. See Table 7 for latching loopback
sequences.
Table 7. Latching Loopback Sequences
ecneuqeS
noitcnuFnoitcnuF
noitcnuF
noitcnuFnoitcnuF
edoCetyB
forebmuN
devieceRdevieceR
devieceR
devieceRdevieceR
setyBsetyB
setyB
setyBsetyB
gnitsixeraelC
skcabpool
otecivedyfitnedI
depooleb
;pooloteraperP
edocPAMdnes
setyb03retfa
etavitcA
kcabpool
ninoitisnarT
)PIT(ssergorp
0101110X
tceleskcabpooL
)CSL(edoc
0SD-1010000X
UCO-1010101X
USC-1000110X
delbanekcabpooL
)EBL(
0110101X
eciovdnE-raF
)VEF(
0101101X
fomuminiM
setybPIT53
fomuminiM
setybCSL53
fomuminiM
setybEBL001
fomuminiM
setybVEF23
dehsilbatseelbasidotderiuqersetybPIT53fomuminiM
.kcabpoolgnihctal
tiberaCt'noD=X
Table 6. Alternating Loopback Sequences
ecneuqeS
noitcnuFnoitcnuF
noitcnuF
noitcnuFnoitcnuF
setyBdevieceR
kcabpooletavitcA
dnakcabpoolniatniaM
srorretibroftset
kcabpoolraelC
fosetybevitucesnocruoF
edockcabpooldeificeps
UCO-0101010X
USC-0001010X
USD-0011010X
htiwgnitanretlaetybataD
edockcabpool
:elpmaxe
0101010X/1DDDDDDX
setybatadevitucesnocruoF
edockcabpoolUSCtuohtiw
tiberact'noD=X
DELroloCnoitpircseD
CNYSDER
NEERG
.cnyskrowtenonsierehttahtsetacidnI
.noitazinorhcnyskrowtensetacidnI
CRCDER.srorreCRCeraerehttahtsetacidniNO
.srorreCRConsetacidniFFO
USDONWOLLEYgnilaeson,langisonsetacidniNO
.gnimarfCSon,tnerruc
dna,tnerrucgnilaes,langissetacidniFFO
.deveihcagnimarfCS
PANEERGneebsahtinuehttahtsetacidniNO
.denoisivorpyletomer
knillortnocetomersetacidniGNIHSALF
.evitca
denoisivorpyllacolsetacidniFFO
.noitarepo
KBLKWTNWOLLEYehtsdrawotkcabpoolasetacidniNO
SDDs'TRtadekovnisikrowten
tseTotesnopserniecafretniremotsuC
.kcabpoolUCOgniussiretneC
drawotkcabpoolsetacidniGNIHSALF
aivUSD/USCtadekovnisikrowten
dna,kcabpoolUSCdednammockrowten
tnerrucgnilaesgnisreverfoesnopsers'TR
.USD/USCot
KBLTSUCWOLLEYehtsdrawotkcabpoolasetacidniNO
R-UCOLSDItadekovnisiremotsuc
.nottubKBLlenaptnorfaivecafretni
sdrawotkcabpoolasetacidniGNIHSALF
NARTDAehttadekovnisiremotsuceht
lenaptnorfR-UCOLSDIaivET1RB-U
.nottubKBL
Table 5. LED Indication