Sony NSBK-CL05 recording Solution Centra Security Services > Security Products > CCTV > Sony NSBK-CL05 recording Solution Posted on April 5, 2015 (May 5, 2019) by Centra Security Services The optional NSBK-CL05 allows you to add extra licenses for four cameras, and you can connect up to 24 network cameras to a single NSR-500 (including the original 16 cameras). Read more