HP 3162 manual System LEDs Name Color Meaning, Network Interface LEDs Name Color Meaning

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-on self-test
			or a system failure has occurred.
		BLINKING : A software download is in progress.
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 System
			and Test Status screen 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.

3-2 August 2000 3162-A2-GB20-40