Paradyne 336x E1 manual Troubleshooting Symptom Possible Cause Solutions

ACCULINK 336x E1 NTU

Troubleshooting	For problems other than those listed in the table, please
	contact your service representative.
The E1 NTU is designed to provide you with many
years of trouble-free service. However, Table 4-7gives
you some direction if a problem occurs.

Table 4-7

(1 of 2)

Troubleshooting

Symptom		Possible Cause		Solutions
No power	1.	The power module is not securely attached.	1.	Check the power module attachment.
	2.	The wall receptacle has no power.	2.	Check the wall receptacle power by plugging
				in some equipment that is known to be
				working.
Power-Up	The E1 NTU has detected an internal hardware		Contact your field service representative.
Self-Test fails	failure.
Message LOS on	1.	Network cable problem.	1.	Check that the network cable is securely
Loop1 or LOS on				attached at both ends.
Loop2 appears	2.	The far-end LTU/NTU is not transmitting.	2.	Check the far-end status.
	3.	Network problem.	3.	Contact your facility provider.
Message LOS at	1.	G.703 DTE cable problem.	1.	Check that the G.703 DTE cable is securely
DTE appears				attached at both ends.
	2.	No signal being transmitted from the DTE.	2.	Check the DTE status.
	3.	The 120 ohm interface is being used and the	3.	Change the RX SHIELD switch to the OPEN
		RX SHIELD switch is in the EARTH position.		position when using the 120 ohm interface.
Message OOF at	1.	Incompatible framing format between the	1.	Check that the framing format for the network
Net appears		network and the E1 NTU.		interface is correct.
	2.	Network cabling problem.	2.	Check that the network cable is securely
				attached at both ends.
	3.	Facility problem.	3.	Contact your facility provider.
Message OOF at	1.	Incompatible framing format between the	1.	Check that the framing format for the G.703
DTE appears		G.703 port on the customer premises		DTE interface is correct.
		equipment and the E1 NTU.
	2.	G.703 DTE cabling problem.	2.	Check that the G.703 DTE cable is securely
				attached at both ends.
Message	1.	Network cable problem.	1.	Check that your network cable is securely
RAI at Net				attached at both ends.
appears	2.	Far-end LTU/NTU has detected an LOS, LOF,	2.	Check the status of the far-end device.
		AIS, or EER condition on the line.
	3.	Facility problem.	3.	Contact your facility provider.
Message	DTE has detected an LOS, LOF, AIS, or EER		1.	Check the status of the DTE.
RAI at DTE	condition.		2.	Check that the G.703 DTE cable is securely
appears
				attached at both ends.
Message	1.	Upstream LTU/NTU is transmitting an AIS.	1.	Check the status of the upstream device(s).
AIS at Net	2.	The network is transmitting an AIS.	2.	Contact your facility provider.
appears

4-12 December 1996 3360-A2-GB20-20