Paradyne 7612 SNMP DSU manual Troubleshooting 2 Symptom Possible Cause Solutions

Messages and Troubleshooting

Table 8-2. Troubleshooting (2 of 2)

Symptom	Possible Cause	Solutions
Device Fail appears	The DSU detects an	H Power the DSU off and on and
on the System and	internal hardware failure.	try again.
Test Status screen		H Clear the message using the
under Self-Test
		Clear command.
results.
		H Contact your service
		representative.
An LED is not lit.	LED is burned out.	Run the Lamp test. If the LED in
		question does not flash with the
		other LEDs, then contact your
		service representative.
No power, or the	The power cord is not	Check that the power cord is
LEDs are not lit.	securely plugged into the	securely attached at both ends.
	wall receptacle and into the
	rear panel connection.
	The wall receptacle has no	H Check the wall receptacle power
	power.	by plugging in some equipment
		that is known to be working.
		H Check the circuit breaker.
		H Verify that your site is not on an
		energy management program.
Not receiving data;	H DDS line rate/speed has	H Verify that your subscriber loop is
DSU is not	changed.	running at 56 or 64 CC kbps.
responding.	H Excessive BPVs causing	H Verify that the DSU is set to the
	DSU to become stuck in	same rate as your subscriber
	Autobaud mode.	loop. (The DSU's rate is
	H Excessive Loop Loss	displayed on the Network
		Interface Status screen.)
	causing DSU to become
	stuck in Autobaud mode.	H If getting Excessive BPVs, verify
		that you do not have a bad cable.
		If the cable is good, contact the
		network provider.
		H If getting excessive Loop Loss
		(dB) indications, install a higher
		quality cable. For maximum
		distances in LADS applications,
		refer to Table F-3 in Appendix F.
		H If the DDS Line Rate (Kbps) field
		shows Autobaud, the DSU may
		be stuck in Autobaud mode.
		Configure Line Rate (Kbps) for
		56 or 64 kbps.
		H Run Loopback tests. Refer to
		Tests Available in Chapter 7.
Power-Up Self-Test	The DSU has detected an	H Reset the DSU and try again.
fails. Only Alarm	internal hardware failure.	H Contact your service
LED is on after
		representative.
power-up.

8-4 November 1997 7612-A2-GB20-10