The Alcatel Composite RNDIS Interface is a type of driver that allows a Windows computer to communicate with certain Alcatel mobile devices (such as smartphones, tablets, or mobile hotspots) through a USB connection. RNDIS (Remote Network Driver Interface Specification) is a Microsoft protocol used to enable network communication between a device (like a mobile phone) and a computer, typically for tethering or using the mobile device as a network adapter.

This driver is typically needed when you want to use your Alcatel device to share its mobile data connection or for other network-related tasks over a USB connection. When installed, it allows your PC to recognize the mobile device as a network adapter.