In Australia (Qantaslink) we have two types of ramps other than the use of the Dash-8 stairs.
One is a small covered ramp that connects from a standard aerobridge to the Dash doorway, and the other is a "Q-ramp" which is about 10m long and is a ramp to the tarmac.
Both fit to the forward exit of the Q400 (also fit onto a Q300).
DIVOSH!