What action will connect the Flight Deck handset to the Cabin Interphone system?

What action will connect the Flight Deck handset to the Cabin Interphone system?

• A. Pick up the handset
• B. Push the PTT button on the handset
• C. Turn the interphone selector switch
• D. Press the PA button on the overhead panel

Answer: (A)

Taking the Flight Deck handset off its cradle (off-hook) is what establishes the connection to the Cabin Interphone. This action closes the circuit and creates the two-way audio link between the flight deck and the cabin. Once the handset is off-hook, you can speak using the PTT control or simply speak if the system allows, depending on the setup. The PTT button is for transmitting after the connection is made, not for initiating it. The interphone selector switch is used to choose who you’re calling once connected, and the PA button on the overhead panel uses a separate public-address path rather than connecting the flight deck handset to the interphone.

Taking the Flight Deck handset off its cradle (off-hook) is what establishes the connection to the Cabin Interphone. This action closes the circuit and creates the two-way audio link between the flight deck and the cabin. Once the handset is off-hook, you can speak using the PTT control or simply speak if the system allows, depending on the setup. The PTT button is for transmitting after the connection is made, not for initiating it. The interphone selector switch is used to choose who you’re calling once connected, and the PA button on the overhead panel uses a separate public-address path rather than connecting the flight deck handset to the interphone.