Troubleshooting
Be systematic in your troubleshooting, from the environmental and then bottom-up from layer 1 upwards.
Table 8: Symptoms and Recommended Actions
Left LED on Port 1 does not light
Check power cabling, and the power supply. Verify
the outlet has power.
Port’s Right LED does not light up
after a device is connected.
1. Check port 1, left LED. If it is OFF, check power
cabling, and the power supply
2. Check that the ISDN device is powered up
3. Check device cabling. Verify interface type.
3. Try another port
4. Contact technical support
Port’s Left LEDs do not light up after
a device is connected.
1. Check that the ISDN device is powered up
2. Try another port (other than port 1)
3. Contact technical support
Left/Right LEDs are solid Green, and
do not start blinking after the placing
a call
1. Verify phone numbers dialed
2. Verify switch type and SPID settings
3. Verify ISDN device configuration
4. Try another port
5. Contact technical support
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User Manual
