[IPOE-171-60W][IPOE-171-95W][POE-171A-60][POE-171A-95] What is the difference between Standard Mode and Legacy Mode?

The IPOE-171-60W, IPOE-171-95W, POE-171A-60 and POE-171A-95 come with a built-in DIP switch for selecting a PoE mode (Standard/Legacy). The difference between Standard Mode and Legacy Mode is shown below: 

• Standard Mode: The PoE injector will have a handshake with PD. If the PD replies to the PoE injector, and the handshake has failed, the PoE injector will not send the PoE power to the PD. 
• Legacy Mode: The PoE injector will have a handshake with PD. If the PD replies to the PoE injector, and the handshake has failed, the PoE injector will still send the PoE power to the PD.If the PD does not reply the PoE injector, it means the PD does not support PoE; the PoE injector will not send the PoE power to the PD.