D-Link DES-3010PA Product Manual - Page 260

Appendix B, Troubleshooting Problems No response from the terminal emulation software Response from the terminal emulations software is not readable Self-test exceeds 15 seconds No connection is established and the port LED is on Device is in a reboot loop No connection and the port LED is off Possible Cause Faulty serial cable Incorrect serial cable Software settings Faulty serial cable Software settings The device may not be correctly installed. Wrong network address in the workstation No network address set Wrong or missing protocol Faulty ethernet cable Faulty port Faulty module Incorrect initial configuration Software fault Incorrect ethernet cable, e.g., crossed rather than straight cable, or vice versa, split pair (incorrect twisting of pairs) Fiber optical cable connection is reversed Bad cable Wrong cable type Solution Replace the serial cable Replace serial cable for a pin-to-pin straight/flat cable Reconfigure the emulation software connection settings. Replace the serial cable Reconfigure the emulation software connection settings. Remove and reinstall the device. If that does not help, consult your technical support representative. Configure the network address in the workstation Configure the network address in the workstation Configure the workstation with IP protocol Replace the cable Replace the module Replace the module Erase the connection and reconfigure the port Download and install a working or previous software version from the console Check pinout and replace if necessary Change if necessary. Check Rx and Tx on fiber optic cable Replace with a tested cable Verify that all 10 Mbps connections use a Cat 5 cable Check the port LED or zoom screen in the NMS application, and change setting if necessary Page 259