Fiber optic module with adapters mounted at open front

1. A fiber optic module adapted to be held by a frame, the fiber optic module comprising:

a housing including a top surface and a bottom surface extending parallel to each other, the top and bottom surfaces interconnected by two spaced-apart side surfaces extending parallel to each other, the top surface, bottom surface, and side surfaces extending between front and rear ends of the housing, the front end being open and defined by edges of the surfaces;

a front end portion mounted at the open front end of the housing, the front end portion defining a plurality of apertures extending through a plane parallel to the top surface of the housing, the front end portion being sized to fit within a perimeter defined by the open front of the housing;

a plurality of fiber optic adapters mounted to the front end portion at the front end of the housing, each fiber optic adapter having a port facing forwardly of the housing; and

a front flange coupled to the housing at the open front end, the front flange being configured to latch the housing to the frame.

2. The fiber optic module of claim 1 , wherein the housing defines a first side flange that extends planar with the top surface of the housing past a first of the side surfaces.

3. The fiber optic module of claim 2 , wherein the first side flange extends planar with the top surface along a direction running between the front end of the housing and the rear end of the housing.

4. The fiber optic module of claim 2 , wherein the housing also defines a second side flange that is planar with the top surface of the housing past a second of the side surfaces.

5. The fiber optic module of claim 1 , wherein one of the side surfaces defines first and second openings, the first opening being positioned further from the rear end of the housing than the second opening, each of the first and second openings being sized to receive a ball end of a spring loaded ball plunger.

6. The fiber optic module of claim 5 , wherein the first and second openings are aligned along a direction running between the front end of the housing and the rear end of the housing.

7. The fiber optic module of claim 5 , wherein the first opening is smaller than the second opening.

8. The fiber optic module of claim 1 , wherein the housing encloses at least one internal cable extending from a first end to a second end, the first end being plugged into rear ports of the fiber optic adapters.

9. The fiber optic module of claim 8 , wherein the housing also encloses a passive optical device to which the second end of the internal cable is optically coupled.

10. The fiber optic module of claim 9 , wherein the passive optical device comprises an optical splitter.

11. The fiber optic module of claim 9 , wherein the passive optical device comprises a straight through connector.

12. The fiber optic module of claim 1 , wherein the top surface of the housing defines a second plurality of apertures that align with the apertures defined by the front end portion.

13. The fiber optic module of claim 12 , wherein each of the fiber optic adapters includes projections that fit into the apertures of the front end portion and the top surface.

14. The fiber optic module of claim 1 , further comprising a second front flange coupled to the housing at the open front end opposite the first front flange, the second front flange being smaller than the first front flange.

15. The fiber optic module of claim 1 , wherein the housing encloses holders that are configured to hold couplers.