Paradyne 3165-A2, 3164-A2, 3160-A3, 3161-B3 System LEDs Name Color Meaning, Network Interface LEDs

3. Operation

Table 3-1. System LEDs

Name	Color	Meaning
OK	Green	Indicates the current operational state of the DSU/CSU.
		ON: The DSU/CSU is operational and has power.
		OFF: The DSU/CSU is performing a power-up self-test or a
		system failure has occurred.
		BLINKING: A software download is in progress.
		FAST BLINK: The carrier-mounted DSU/CSU is currently
		selected by the SDCP.
FAIL	Yellow	Indicates a system failure or a self-test.
		ON: A device error/fault is detected or a reset has just occurred.
		OFF: No system failures are detected.
		BLINKING: A self-test is in progress.
TEST	Yellow	A system test is in progress.
		ON: A loopback or pattern test has been initiated either locally, by
		the network, or externally.
		OFF: No tests are active.

Table 3-2.	Network Interface LEDs
Name	Color	Meaning
SIG	Green	Monitors the signal being received from the network.
		ON: A recoverable signal is being received from the network.
		OFF: The signal cannot be recovered from the network (a Loss of
		Signal condition exists).
OOF	Yellow	Monitors Out Of Frame (OOF) conditions on the received
		network signal.
		ON: At least one OOF was detected on the signal during the
		sampling period.
		OFF: No OOFs were detected on the signal during the sampling
		period.
ALRM	Yellow	Indicates whether an alarm condition exists on the received
		network signal.
		ON: An alarm condition (LOS, LOF, EER, Yellow, AIS) exists on
		the received network signal. Use the Device Health and Status
		command to determine the alarm type.
		OFF: No alarm condition exists on the network interface signal.
EER	Yellow	Indicates the Excessive Error Rate (EER) has been exceeded on
		the network interface.
		NOTE: This LED is only valid when ESF framing is being used.
		ON: The EER has been exceeded on the network interface.
		OFF: The EER has not been exceeded on the network interface.

3-6 February 2001 3160-A2-GB21-90