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DIAGNOSTIC LED(S)
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|
LED
|
Color
|
Status
|
Condition
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|
OK
|
Green
|
On
|
DSU/CSU power is on
|
|
OK
|
Green
|
Off
|
DSU/CSU power is off, performing a self test, or detecting a system failure
|
|
FAIL
|
Red
|
On
|
DSU/CSU is performing a self test, or detecting a system failure
|
|
FAIL
|
Red
|
Off
|
DSU/CSU is not performing a self test, or detecting a system failure
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|
TST
|
Yellow
|
On
|
DSU/CSU is executing a test
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|
TST
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Yellow
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Off
|
DSU/CSU is not executing a test
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|
SIG
|
Green
|
On
|
A recoverable signal is detected on network
|
|
SIG
|
Green
|
Off
|
Network signal can not be recovered.
|
|
OOF
|
Yellow
|
On
|
DSU/CSU is detecting an out of frame condition
|
|
OOF
|
Yellow
|
Off
|
DSU/CSU is not detecting an out of frame condition
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ALM
|
Yellow
|
On
|
DSU/CSU has detected an alarm condition on network
|
|
ALM
|
Yellow
|
Off
|
DSU/CSU has detected an alarm condition on network
|
|
EER
|
Yellow
|
On
|
Excessive error rate threshold has been exceeded on network
|
|
EER
|
Yellow
|
Off
|
Excessive error rate threshold has not been exceeded on network
|
|
TXD
|
Green
|
On
|
Receiving all zeros from the DTE
|
|
TXD
|
Green
|
Off
|
Receiving all ones from the DTE
|
|
TXD
|
Green
|
Blinking
|
Data is being transferred
|
|
RXD
|
Green
|
On
|
Transmitting all zeros from the DTE
|
|
RXD
|
Green
|
Off
|
Transmitting all ones from the DTE
|
|
RXD
|
Green
|
Blinking
|
Data is being transferred
|
|
RTS
|
Green
|
On
|
RTS signal is high
|
|
RTS
|
Green
|
Off
|
RTS signal is low
|
|
CTS
|
Green
|
On
|
CTS signal is high
|
|
CTS
|
Green
|
Off
|
CTS signal is low
|
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DTR
|
Green
|
On
|
DTR signal is high
|
|
DTR
|
Green
|
Off
|
DTR signal is low
|