Troubleshooting - Paradyne 3350 User Manual

ACCULINK 3350 E1 NTU

Troubleshooting

AT&T Paradyne's E1 NTU is designed to provide you
with many years of trouble-free service. However,
Table 4-7 gives you some direction if a problem occurs.
Symptom
No power 1. The power module is not securely attached.
2. The wall receptacle has no power.
Power-Up The E1 NTU has detected an internal hardware
Self-Test fails failure.
Message LOS on 1. Network cable problem.
Loop1 or LOS on
Loop2 appears
2. The far-end LTU/NTU is not transmitting.
3. Network problem.
Message LOS at 1. G.703 DTE cable problem.
DTE appears
2. No signal being transmitted from the DTE.
3. The 120 ohm interface is being used and the
RX SHIELD switch is in the EARTH position.
Message OOF at 1. Incompatible framing format between the
Net appears network and the E1 NTU.
2. Network cabling problem.
3. Facility problem.
Message OOF at 1. Incompatible framing format between the
DTE appears G.703 port on the customer premises
equipment and the E1 NTU.
2. G.703 DTE cabling problem.
Message 1. Network cable problem.
RAI at Net
appears
2. Far-end LTU/NTU has detected an LOS, LOF,
AIS, or EER condition on the line.
3. Facility problem.
Message DTE has detected an LOS, LOF, AIS, or EER
RAI at DTE condition.
appears
Message 1. Upstream LTU/NTU is transmitting an AIS.
AIS at Net
2. The network is transmitting an AIS.
appears
4-12
contact your AT&T Paradyne service representative.
Table 4-7
(1 of 2)

Troubleshooting

Possible Cause
June 1996
For problems other than those listed in the table, please
Solutions
1. Check the power module attachment.
2. Check the wall receptacle power by plugging
in some equipment that is known to be
working.
Contact your AT&T Paradyne field service
representative.
1. Check that the network cable is securely
attached at both ends.
2. Check the far-end status.
3. Contact your facility provider.
1. Check that the G.703 DTE cable is securely
attached at both ends.
2. Check the DTE status.
3. Change the RX SHIELD switch to the OPEN
position when using the 120 ohm interface.
1. Check that the framing format for the network
interface is correct.
2. Check that the network cable is securely
attached at both ends.
3. Contact your facility provider.
1. Check that the framing format for the G.703
DTE interface is correct.
2. Check that the G.703 DTE cable is securely
attached at both ends.
1. Check that your network cable is securely
attached at both ends.
2. Check the status of the far-end device.
3. Contact your facility provider.
1. Check the status of the DTE.
2. Check that the G.703 DTE cable is securely
attached at both ends.
1. Check the status of the upstream device(s).
2. Contact your facility provider.
3350-A2-GB20-10