If I read it correctly, this is what he means:
I have an interface. It is PCI/USB/Firewire/whatever
It has inputs, but it also has outputs. Why?
-- so you can feed other pieces of outboard gear
Do the inputs pass audio through to the outputs? Like Input 1 to output 1, input 2 to output 2, etc.
-- yes
If this is not what you mean, please clarify. Hell, why don't you clarify it for us anyway, Sleepy...