The ATM network was designed to deal with all sorts of traffic such as data-, voice-, and video-traffic. This is achieved using service categories (CBR, VBR, ABR, and UBR) and AAL protocols. Existing ATM Network Interface Cards (NICs) realize the full-range of service categories but generally perform only one AAL protocol (AAL1 $ARLR AAL5). Research in our laboratory investigates possibilities that offer reconfigurable logic (FPGA) in the field of ATM NICs. In this paper, we present a flexible multiservice ATM network interface. It is flexible through the use of FPGA (and eventually other resources like multipurpose processors) and it is multiservice as it enables lots of possible AAL-protocols, including complete AAL1 and AAL5, at one and the same time and also new specialized, proprietary adaptation protocols. These new protocols could be specially designed for security, compression, data structure recognition, ... Here present bandwidth estimations based on sample implementations and possible target architectures using different types of FPGAs (statically or partially/dynamically reconfigurable). Their advantages and drawbacks are discussed. Finally we try to isolate the open questions related to the flexible multiservice network interface.