iConnectivity iConnectMIDI2+ Owner's Manual page 27

In the following screen from the Mac version you can see that iCM2 DIN 1 is routed to
both USB Device Jacks' first ports and to DIN 2. This is the default routing:
[Port Routing window]
There are countless applications in which the routing feature might be useful. Perhaps
you need one MIDI keyboard controller routed to a layered sound that's on two
different computer devices, or maybe you have a percussion pad that you want
"hardwired" to a percussion module. Or perhaps you don't need the computer device
connected to iCM2 USB Port 1 to see the MIDI keyboard connected to DIN port1, so
you disable the keyboard connection to free up the 16-channel MIDI port it was using.
Port Filters tab
This matrix is for filtering various types of MIDI data on input and/or output. To use it in
the Mac and Windows software, select the Port(s) to be filtered in the Port column.
Also choose whether you're filtering the input or output:
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