0:06
Air valve release hose connect, leak, hollow hiss.
0:01
Air valve, release hose connecting - short metallic his.
0:02
Pneumatic air valve connect
0:01
Short light clicking of an elevator button being depressed
0:01
Solid clunk of electrical equipment jack connector into socket
0:12
Dial tone, numbers keyed, ring tone heard, hook flash button pressed. Heard through earpiece.