The CRS328-4C-20S-4S+RM is a 28 independent port switch with a combo
group. This device has twenty SFP ports, four SFP+ ports for 10G
modules and four combo ports, where you can choose to use SFP or RJ45
ports from the combo group. These ports can also be software selected,
so if you have plugged in all eight cables, you can use scripting, to
decide which four combo ports will be active.
The device comes in a 1U rackmount case with two 100-240 V power
supplies with failover functionality. A RJ45 console port is available
for management and debugging, and a mode button can be customised to
execute any RouterOS commands.