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The Panasonic KX-NS7130 is an expansion card for connecting up to 3 expansion shelves.The card has been designed to connect to the network servers KX-NS700 with shelves expansion KX-NS720. The device allows you to connect up to 3 expansion shelves. The device comes with an EXP-M card and mounting hardware. The card has 3 RJ45 slots for connectivity.