Which pin of the UTP cable does PoE function use to supply power?

1. Alternative A Power supply superposition on 1, 2, 3, 6 pins
2. Alternative B Power supply superposition on 4, 5, 7, 8 pins

Applicable models
Product name Product number Classification
Switch-M24eGLPWR+ PN28248 A
Switch-M16eGLPWR+ PN28168 A
Switch-M12eGLPWR+ PN28128 A
Switch-M8eGLPWR+ PN28088 A
Switch-M5eGLPWR+ PN28058 A
Switch-M24PWR PN23249A B
Switch-M16PWR PN23169A B
Switch-M12PWR PN23129A B
Switch-M8ePWR PN27089KA B
Switch-M8esPWR PN27089NA B
Switch-S24GPWR PN25249 A
Switch-S9GPWR PN24099 A
Switch-S5GPWR PN24059 A