The chief engineer had many phones. It’s my guess one connects to the pilot house and the other connects to the emergency steerage station that’s mid-deck.
Bells are highly symbolic, being used from everything from calling worshipers in the morning to exorcising demons at night.
The gauges on left of frame are the steam pressure indicators for the various steam-powered components around the ship, like the steering engine and windlass motors. Below the gauges are a case of tiny wooden parts drawers… note the ancient oiling can on the locker near the upper-right corner of the frame.
The elevator near the offices seemed a day’s work away from being operational