When Ethernet Switches are connected through a UTP cable, some ports can link up but others cannot. Why does such a difference exist?

For some ports, the function which identifies whether the connected UTP cable is a straight cable or a crossing cable is disabled by factory default, but a cross cable is required for connecting such ports.
There are models which can enable/disable this function.

Applicable models
Product name Product number Applicable port
Switch-M48eG PN28480K 1-46port
Switch-M16eG PN28160K 1-22port
Switch-M16eG PN28160K 1-14port
Switch-M8eG PN28080K 1-7port
Switch-M24eGLPWR+ PN28248 1-24port
Switch-M16eGLPWR+ PN28168 1-16port
Switch-M12eGLPWR+ PN28128 1-12port
Switch-M8eGLPWR+ PN28088 1-8port
Switch-M5eGLPWR+ PN28058 1-4port
Switch-M24PWR PN23249A 1-24port
Switch-M16PWR PN23169A 1-16port
Switch-M12PWR PN23129A 1-12port
Switch-M8ePWR PN27089KA 1-8port
Switch-M8esPWR PN27089NA 1-8port
Switch-S24GPWR PN25249 1-24port
Switch-S9GPWR PN24099 1-9port
Switch-S5GPWR PN24059 1-4port