Modular ceiling system

A modular ceiling system comprising:

• a. a ceiling support structure for supporting a ceiling having a room side;
• b. a plurality of uniformly sized and shaped separate openings in the ceiling;
• c. a plurality of uniformly sized and shaped devices fitted to the openings, the devices of the plurality of devices have different functions, and the devices with different functions are connected to a network having a common communication protocol and a common power source;
• d. a central control system having the same communication protocol as the devices;
• e. the network connecting the central control system and all of the devices together and communications among the central control system and the devices uses the common communication protocol;
• and
• f. a drop-down tray for access to functional components of the modular ceiling system, for accommodating a video monitor, or for accommodating signage.

A modular ceiling system comprising:

• a. a ceiling support structure for supporting a ceiling having a room side;
• b. a plurality of uniformly sized and shaped separate openings in the ceiling;
• c. a plurality of uniformly sized and shaped devices with diverse functions fitted to the openings, wherein each device comprises:
• i. a housing fitted into and attached to the opening and a case inserted into and attached to the housing;
• ii. the case contains an operative unit for each device;
• and
• iii. each case is interchangeable with each other case so that the cases with the contained operative unit can be swapped between and among housings.

A modular ceiling system comprising:

• a. a ceiling support structure for supporting a ceiling having a room side;
• b. a plurality of uniformly sized and shaped separate openings in the ceiling;
• c. a plurality of uniformly sized and shaped devices with diverse functions fitted to the openings, wherein the devices share a common power supply and wherein each device comprises:
• i. a housing fitted into and attached to the opening and a case inserted into and attached to the housing;
• ii. the case contains an operative unit for each device;
• and
• iii. each case is interchangeable with each other case so that the cases with the contained operative unit can be swapped between and among housings.