The Soft Power Switch - JST 2mm is a passive, hard on/off switch with software feedback and control. In other words, it's like the on/off switch on a laptop. A simple press will turn the system on.
Poe Lurker have an installer you will need to run the PoeLurkerSetup.exe once. If you're already using Poe Lurker, you won't need these, since it will update itself. If you like and use Poe Lurker ...
Starlink Cable: The standard kit includes a 15 meters (49.2 feet) or 25 meters (82 feet) detachable PoE cable that connects the 'Dishy' to the power supply/router unit. This cable is power-rated ...
In short TPS23730 is rated for 51W (Class-6) standard PD and TPS23731 is rated for 25.5W (Class-4) standard PD. In majority of cases, BT PoE is for Class 5-8 (40W - 71.3W), and TPS23730 is recommended ...