Those are different Chips on the Switch. "An Ethernet PHYceiver is a chip that implements the hardware send and receive function of Ethernet frames; it interfaces to the line modulation at one end and binary packet signaling at the other. Functions like MAC addressing are implemented by the Media Access Control function. Wake-on-LAN and Boot ROM functionality is implemented in the network interface card (NIC), which may have PHY, MAC and other functionality integrated into one chip or as separate chips." Are you seeing any temperature issues with them?
Hi,   When I check the temperature of the PowerConnect 8132F I can see PHY and MAC temperatures.What are these? Thanks for any reply.   Regards, Martins
PowerConnect 8132F temperatures