@JohnFro as said by others, it really depends on what features you use. We use some of the same CBS350 switches for HD video distribution as they are controlled by the vendor we use. If you only use them as isolated access switches and have the version with 4x 1Gb ports, then an MS120-48 is nearest, but if you use more features, you could need all the way up to an MS250-48.
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