Paradyne 317x E1 manual of Troubleshooting, Symptom, Possible Cause, Solutions, RAI at Net

Maintenance

Troubleshooting	problems other than those listed in the table, please
	contact your service representative.
The E1 DSU/CSU is designed to provide you with
many years of trouble-free service. However, Table 4-6
gives you some direction if a problem occurs. For

Table 4-6

(1 of 2)

Troubleshooting

Symptom		Possible Cause		Solutions
No power	1.	The power cord is not securely plugged into	1.	Check that the power cord is securely
		the wall receptacle or rear panel connector.		attached at both ends.
	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 DSU/CSU has detected an internal		Contact your field service representative.
Self-Test fails	hardware failure.
Message LOS at	1.	Network cable problem.	1.	Check that the network cable is securely
Net appears	2.	No signal is being transmitted at the far-end		attached at both ends.
		E1 DSU/CSU.	2.	Check the far-end E1 DSU/CSU status.
	3.	E1 facility problem.	3.	Contact your E1 facility provider.
	4.	The 120 ohm interface is being used and the	4.	Change the RX SHIELD switch to the OPEN
		RX SHIELD switch is in the EARTH position.		position when using the 120 ohm interface.
Message LOS at	1.	DTE Drop/Insert cable problem.	1.	Check that the DTE Drop/Insert cable is
DTE appears	2.	No signal being transmitted from the DTE.		securely attached at both ends.
			2.	Check the DTE status.
Message OOF at	1.	Incompatible framing format between the	1.	Check that the framing format for the network
Net appears		network and the E1 DSU/CSU.		interface is correct.
	2.	Network cabling problem.	2.	Check that the network cable is securely
	3.	E1 facility problem.		attached at both ends.
			3.	Contact your E1 facility provider.
Message OOF at	1.	Incompatible framing format between the	1.	Check that the framing format for the DTE
DTE appears		Drop/Insert port on the customer premises		Drop/Insert interface is correct.
		equipment and the E1 DSU/CSU.	2.	Check that the DTE Drop/Insert cable is
	2.	DTE Drop/Insert cabling problem.		securely attached at both ends.
Message	1.	Network cable problem.	1.	Check that your network cable is securely
RAI at Net	2.	Far-end E1 DSU/CSU DTE has detected an		attached at both ends.
appears
		LOS, LOF, AIS, or EER condition.	2.	Check the status of the far-end device.
	3.	E1 facility problem.	3.	Contact your E1 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 DTE Drop/Insert cable is
appears
				securely attached at both ends.
Message	1.	Upstream E1 DSU/CSU is transmitting an AIS.	1.	Check the status of the upstream E1
AIS at Net	2.	The network is transmitting an AIS.		DSU/CSU(s).
appears			2.	Contact your E1 facility provider.

3170-A2-GB20-20 December 1996 4-11