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As technology improves CC sunsets older models due to offering higher speeds that the device may not be capable of. It still works but, it may not get the newer speed tiers. If it's working then don't worry about it When it starts to be a problem then it's time to start shopping for a newer model that has either 16x4 channels or 32x8 for the longevity of the purchase. One step further would be an upgrade to a D3.1 model.