The Motorola Premisys 8164 is a 4-port DSM (Data Service Module) network card designed for use with Motorola networking equipment. This product allows for the expansion of networking capabilities, specifically providing four additional ports for connecting various devices. As part of the Premisys product line, this DSM 4 PORT module is compatible with Motorola networking devices, offering a reliable and high-quality solution for expanding network connectivity. Ideal for businesses or home offices looking to enhance their network infrastructure.