With a passive twin-ax cable assembly of 3 meters and two SFP+ connectors on each side, SM5220-3M (TL-SM5220-3M) is suitable for short distances and offers a cost-effective way to connect within racks and across adjacent racks.
With a passive twin-ax cable assembly of 1 meter and two SFP28 connectors on each side, SM6220-1M is suitable for short distances and offers a cost-effective way to connect within racks and across adjacent racks.