Abstract: An Ethernet card (CL) is dedicated to the connection of a communication terminal (UE) to a local network via an Ethernet connection (CX). The terminal (UE) can be powered electrically by first power means (MAP), and includes a first internal bus (PCI1). The card (CL) includes i) second power means (MAA) capable of being powered remotely, via the Ethernet connection (CX), by power control means (PPP) on the local network, ii) a second bus (PCI2) coupled to the first internal bus (PCI1), iii) coupling means (MCP) coupled to the second bus (PCI2), and iv) control means (MCC) connected logically to the first (MAP) and second (MAA) power means and tasked, in the event of detection of remote powering of the card (CL) and the absence of electrical powering of the terminal (UE) by its first power means (MAP), to command the coupling means to electrically decouple the card from the first internal bus (PCI1), in order to allow its operation independently of the terminal (UE).