Avaya G860 Installing And Operating page 158

Avaya G860 Media Gateway
5. Verify that the fan tray unit is functioning correctly by putting your left hand over
the grill on the left side of the Avaya G860 Media Gateway chassis (when facing
the front cage), and your right hand over the grill on the right side. Your left hand
should feel a reasonably strong suction of the air drawn in by the fan. Your right
hand should feel the air blowing reasonably strongly out of the Avaya G860
Media Gateway.
158 Installation & Operation Manual