Yes Sausages can be deep fried.
Just like you can deep fry hot dogs you can also deep fry sausages.
I've deep fried sausages a lot and they come out really good.
I mostly prefer my sausages just grilled or in the skillet but sometimes having some fried sausages is great.
Deep frying the sausages takes around 5 minutes if the sausages are thawed.
If the sausages are frozen it can take between 6 to 7 minutes to fully cook the sausage.
If you deep fry frozen sausage you should put the sausage in the deep fryer oil first and then turn the deep fryer on.
Because putting frozen sausage directly into hot hold can cause the oil to splash back and cause a fire and can burn you.
I mostly deep fry or cook sausages once they've thawed out in the refrigerator overnight.