COM port mapping
pull down menu
The COM port mapping pull down menu allows you to reassign the selected Keyspan COM port in the
COM port list window. This window also reports whether a COM port is 'in use'. In this menu, 'in use'
means that the selected COM port has assigned or reserved. It is highly recommended that you only
change the COM port mapping to COM ports that are not 'in use'.
Note: The COM port mapping pull down menu allows you to change the COM port mapping to any
COM port including those that have already been assigned (aka in use). Changing the COM port map-
ping to a COM port that is in use may render any hardware and/or software using that port inoper-
able.
Adapter Port Mapping Mode
box
The Adapter Port Mapping Mode box allows you to change the behavior of how Keyspan COM port
numbers are assigned when you connect the Keyspan adapter to a different USB port than the one it
was originally connected to.
Dynamic:
Dynamic assigns a COM port number (or numbers if your Keyspan adapter has multiple serial
ports) to a particular Keyspan adapter. If you disconnect the Keyspan adapter and connect it
to a different USB port, the COM port number of that Keyspan adapter will not change. This is
the default setting and is recommended setting if you only have one Keyspan adapter.
Geographic:
Geographic assigns a COM port number (or numbers if your Keyspan adapter has multiple serial
ports) to a particular USB port on your computer. If you disconnect the Keyspan adapter and
connect it to a different USB port, the COM port number of that Keyspan adapter will change.
This setting is recommended if you are using multiple Keyspan adapters and want the COM port
numbers to remain the same.
Delete All Keyspan USB Serial Adapter Port Mappings
button
Note: this is an option for advanced users only. If you are unsure about how this command will affect
your computer, do not use it.
The Delete All Keyspan USB Serial Adapter Port Mappings button clears the Windows registry of all
Keyspan USB Serial Adapter COM port numbers and Keyspan USB information. This allows Windows to
create new COM port assignments.
Diagnostics tab
The Diagnostic tab in the Keyspan Serial Assistant reports diagnostic information about your Keyspan
adapter's software and hardware. The following is an explanation of the items in this tab.
Diagnostics tab
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