Quick Eagle Networks DL3800E manual Troubleshooting 3

6

	Table 6-1 Troubleshooting (3 of 5)
Problem	Solution
The NETWORK E1 LEDs	Make sure a valid DTE device is connected to the DL3800E, and is powered
on an DL3800E unit are	on.
flashing green.	If no DTE device is connected and the unit is configured for V.35 or RS449,
	make sure that DTE LOSS is set to None. If the unit is configured for HSSI,
	check for a valid HSSI signal (TA).
	If a DTE device is connected, make sure all DTE port LEDs are on.
	Check the CURRENT ALARMS AND STATUS ITEMS MENU to make sure no
	alarm thresholds have been exceeded.
	An E1 circuit is taken out of service for a configured amount of time if
	Fallbacks (in Network Alarm Thresholds) or Second Error Restoral Interval (in
	Network Configuration) is enabled, and a threshold has been exceeded.
	Make sure that the correct E1 cable is connected to the correct E1 port.
	Make sure that the E1 lines are not crossed (Check Alarms & Status Menu).
	You must restore the E1 line manually if it is configured for use w/Manual
	Restore (in Network Configuration), and a threshold or alarm condition has
	been exceeded.
The DTE port LED’s on the	Make sure the correct DTE cable is securely attached to both units, and the
DL3800E unit do not	connected DTE device is actually passing traffic.
illuminate.	If the connected DTE device does not support the RTS or DTR leads,
	configure the DTE LOSS for None. This asserts the CTS lead from the
	DL3800E.
	Make sure the DL3800E unit is configured for the correct electrical signaling
	from the DTE device: V.35, RS449, HSSI or x.21.
The UNIT Major and	Alarm thresholds may have been exceeded for the 15 minute or 24 hour
Minor Alarm LEDs on the	periods. If other thresholds have not been exceeded, the DL3800E unit
DL3800E unit do not clear.	automatically clears these alarms after the period has passed.

6-6 DL3800E Inverse Multiplex User’s Guide — July 9, 2001