Black Box LRU4240 manual Unit Problems 2

Dual Trunk E1 Router

Table 11-1 Unit Problems (2 of 4)

Symptom	Probable Cause	Solution
Current user initiated tests	• Misconfiguration for Menu-9A	• Make sure the system is set to run
terminate themselves without user	Timeout.	the test for an unlimited amount of
intervention.		time.
		• Test length options are 15 min., 1
		min., 60 min., Unlimited.
		With Self Test, Loop Up Remote
		and Loop Down Remote, Unlimited
		does not apply.
		• If the above step does not correct
		the problem, call Black Box
		Technical Support for assistance.
The system cannot be put into	• Unit does not recognize Loop	• Make sure the remote unit is
network loopback from the remote	command being sent.	sending the correct loop code.
unit.	• Loopback detect is disabled on	• Make sure the system is set to
	unit.	receive the same standard or
	• Circuit is down or in Loop towards	alternate code as the remote unit.
		• Using your E1 test set, send a loop
	remote unit.
		up code into the system. If the
		system still does not loop up, call
		Black Box Technical Support for
		assistance.
The system cannot be put into	• Framing protocol choice.	• Make sure the system is set for
payload loopback from the	• Wrong timeslots used for test	T1.403 Annex B fractional
network.		loopback code, if the network is
	signal.
		sending T1.403 Annex B to loop it
		up.
		• Make sure the payload portion you
		are attempting to loop up has
		assigned bandwidth.
		• If the LRU4240 still does not loop
		up, use your E1 test set to inject a
		fractional loopback signal into the
		payload you wish to loop up.
		• If the above steps fail, call Black
		Box Technical Support for
		assistance.
After power-up, the menu clock no	• Time not set.	• Set the time in Menu-4.
longer shows the correct time or		• If the time is still incorrect, call
date.
		Technical Support.

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