Paradyne 7610 manual Troubleshooting 2 Symptom Possible Cause Solutions, Tests Available section

Messages and Troubleshooting

Table 8-2. Troubleshooting (2 of 2)

Symptom	Possible Cause	Solutions
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	1.	Verify that your subscriber loop is
DSU is not	changed.		running at 56 or 64 CC kbps.
responding.	H Excessive BPVs causing	2.	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 displayed
	H Excessive Loop Loss		on the Network Interface Status
	causing DSU to become		screen.
	stuck in Autobaud mode.	3.	If getting Excessive BPVs, verify
			that you do not have a bad cable.
			If the cable is good, contact the
			network provider.
		4.	If getting excessive Loop Loss
			(dB) indications, install a higher
			quality cable. Refer to Model
			7610 DSU LADS Connection
			Distances, Table 3, in the
			Start-Up Instructions.
		5.	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.
		6.	Run Loopback tests. Refer to the
			Tests Available section of
			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.

8-6 November 1997 7610-A2-GB20-10