Lantronix SISTP1040-551-LRT SISTP1040-551-LRT Install Guide Rev B - Page 21

Lantronix SISTP1040-551-LRT Install Guide Troubleshooting Procedure If the switch fails, isolate and correct the fault by determining the answers to the following questions and then taking the indicated action. First isolate the problem to the SISTP1040-551-LRT; troubleshoot any other network gear (e.g., other switches, remote devices such as IP cameras, WAPs, midspan injectors, etc.) to isolate the problem to the SISTP1040-551-LRT. 1. If one of the Green Power LEDs (P1 or P2) is not lit check the following: □ Is the power source live and to spec? Adjust the Power Supply front panel +V ADJ screw as needed. □ Is the power adapter properly installed? Verify that you are using the right power cord/adapter. Using a power adapter with DC voltage output higher than the rated voltage of the switch will damage the switch. Check connections between the switch, the power cord, and the wall outlet. □ Are the power cables properly installed? Check for loose power connections, power losses or surges at the power outlet. See the related section of this manual for details. 2. Check the port LEDs. If the Link/Act LED is not lit, then verify that the copper and fiber cable requirements are met. See Technical Specifications on page 5. 3. Make sure that the function you are trying to use is supported. See Features on page 4. 4. Verify the install procedures were performed correctly as described in previous sections of this manual. 5. Check that the proper cable type is used and its length does not exceed specified limits. See Ethernet Interface Connection (RJ45 Ethernet) on page 11 and Ethernet Interface Connection (Fiber, SFP) on page 13. 6. Verify the DIP switch option settings; see DIP Switch Settings on page 13. 7. If you still cannot resolve the problem, record the model and system information; see Contact Us. PoE Troubleshooting Try these simple steps: Verify that the PD accepts Power over Ethernet. Check the POE cabling. Make sure PoE power is sufficient. Check if PDs work on other PoE ports. Check if other PDs work on this PoE port. Make sure that the switch port is properly connected to the PD. 33841 Rev. B https://www.lantronix.com/ Page 21 of 26