NEP-2 Network Expansion Port Lowrance NEP-2 Network Expansion Port-2 plug-and-play hub for high-speed data-sharing of multiple HDS, LCX,and LMS products with ethernet modules, like the LWX-1 SIRIUS Satellite Radar and Radio module and the Broadband Sounder module across the onboard network. Lowrance NEP-2 Waterproof expansion ports resist corrosive marine environments. Unused expansion ports capped for future expansion.