Below grade closure for local convergence point

• US 6,778,752 B2
• Filed: 05/31/2002
• Issued: 08/17/2004
• Est. Priority Date: 05/31/2002
• Status: Active Grant

• Current Assignee: Corning Optical Communications LLC (Corning Incorporated)
• Original Assignee: Corning Cable Systems LLC (Corning Incorporated)
• Inventors: Rodriguez, Diana, Hoflich, Andrew D., Laporte, Richard B.
• Primary Examiner(s): Patel, Tulsidas C.
• Application Number:
  US10/160,796
• Publication Number:
  US 20030223725A1
• Time in Patent Office: 809 Days
• Field of Search: 385/134, 385/135, 385/136, 385/137
• US Class Current: 385/135
• CPC Class Codes: G02B 6/4442 Cap coupling boxes

Abstract

A closure interconnects at least one optical fiber of a feeder cable with two or more optical fibers of a distribution cable at a local convergence point in an optical network. The closure includes a frame defining a longitudinal axis and a plurality of mounting surfaces. The closure further includes a fiber coupling area adjacent one of the mounting surfaces and a fiber management area adjacent another one of the mounting surfaces. The fiber coupling area includes at least one coupler module for splitting an optical signal carried on the optical fiber of the feeder cable into different optical signals carried on the two or more optical fibers of the distribution cable. The optical fibers of the distribution cable may be pre-connectorized drop cables, connectorized pigtails that are field terminated to fanout connectors, or optical fibers that are field terminated by mechanically splicing the optical fibers to drop cables.

Claims

1. A closure for interconnecting at least one optical fiber of a feeder cable with two or more optical fibers of a distribution cable, the closure comprising:

a frame defining a longitudinal axis;

an end cap affixed to the frame and having at least one opening therethrough for receiving the feeder cable and at least one opening therethrough for receiving the distribution cable;

a fiber coupling area comprising a plurality of coupler modules for splitting an optical signal carried by the at least one optical fiber of the feeder cable into two or more optical signals carried by the two or more optical fibers of the distribution cable, the coupler modules removably attached to a first mounting surface defined by the frame that is parallel to the longitudinal axis; and

a fiber management area for routing the at least one optical fiber of the feeder cable to the fiber coupling area and for routing the two or more optical fibers of the distribution cable from the fiber coupling area, the fiber management area positioned adjacent a second mounting surface defined by the frame that is parallel to the longitudinal axis and is not parallel to the first mounting surface;

wherein the optical fiber of the feeder cable and the optical fibers of the distribution cable are connectorized; and

wherein each of the coupler modules comprises a plurality of adapters for receiving the connectorized optical fiber of the feeder cable and the connectorized optical fibers of the distribution cable, the adapters mounted on the coupler modules in a linear array that is parallel to the longitudinal axis.

2. A closure according to claim 1 wherein the frame defines a cavity and each of the coupler modules comprises a housing that is positioned within the cavity such that the housing is parallel to the longitudinal axis defined by the frame.

3. A closure according to claim 1 wherein each of the coupler modules comprises a housing having a hook at one end that is received within a hook opening formed in the first mounting surface and a latch plunger at the opposite end that engages a grommet provided in the first mounting surface to secure the coupler module to the first mounting surface.

4. A closure according to claim 1 wherein the fiber management area comprises at least one splice tray, at least one fiber routing guide, and a fiber routing panel.

5. A closure according to claim 4 wherein the fiber routing panel is positioned radially outwardly from the at least one splice tray and comprises at least one fiber routing clip and at least one fiber organizer.

6. A closure according to claim 5 wherein the fiber organizer comprises a base attached to the fiber routing panel, a lid movably attached to the base for movement between an opened position and a closed position, and a plurality of hook elements that define spaced apart rows for separating and guiding at least one optical fiber of the feeder cable and the two or more optical fibers of the distribution cable, the lid securing the optical fiber of the feeder cable and the optical fibers of the distribution cable between the rows of hook elements when the lid is moved to the closed position.

7. A closure according to claim 1 further comprising a fiber storage area for storing a slack length of the feeder cable.

8. A closure according to claim 7 wherein the fiber storage area comprises a slack storage basket having at least one flange for retaining the slack length of the feeder cable.

9. A closure according to claim 7 wherein the fiber management area and the fiber storage area are generally parallel and spaced apart.

10. A closure according to claim 1 further comprising a fiber connecting area.

11. A closure according to claim 1 wherein the two or more optical fibers of the distribution cable are pre-connectorized drop cables.

12. A closure according to claim 10 wherein the fiber connecting area comprises at least one fanout kit having a plurality of fanout connectors for interconnecting the two or more optical fibers of the distribution table with a plurality of optical fibers of drop cables.

13. A closure according to claim 10 wherein the fiber connecting area comprises a splice tray for interconnecting two more optical fibers of the distribution with a plurality of optical fibers of drop cables.

14. A closure for interconnecting an input optical fiber with a plurality of output optical fiber, the closure comprising:

a frame defining a longitudinal axis and a plurality of mounting surfaces;

a fiber coupling area adjacent a first one of the mounting surfaces comprising a plurality of removable coupler modules for splitting an optical signal carried by the input optical fiber of the feeder cable into a plurality of optical signals carried by the output optical fibers, the first mounting surface generally parallel to the longitudinal axis; and

a fiber management area adjacent a second one of the mounting surfaces for routing the input optical fiber to the fiber coupling area and for routing the output optical fibers from the fiber coupling area, the second mounting surface generally parallel to the longitudinal axis and not parallel to the first mounting surface;

wherein the input optical fiber and the output optical fibers are connectorized; and

wherein each of the coupler modules comprises a plurality of adapters for receiving the connectorized input optical fiber and the connectorized output optical fibers, the adapters mounted on the coupler modules in a linear array that is parallel to the longitudinal axis.

15. A closure according to claim 14 wherein the frame defines a cavity and each of the coupler modules comprises a housing that is positioned within the cavity such that the housing is parallel to the longitudinal axis defined by the frame.

16. A closure according to claim 14 wherein each of the coupler modules comprises a housing having a hook at one end that is received within a hook opening formed in the first mounting surface and a latch plunger at the opposite end that engages a grommet provided in the first mounting surface to secure the coupler module to the first mounting surface.

17. A closure according to claim 14 wherein the fiber management area comprises at least one splice tray, at least one fiber routing guide, and a fiber routing panel.

18. A closure according to claim 17 wherein the fiber routing panel is positioned radially outwardly from the at least one splice tray and comprises at least one fiber routing clip and at least one fiber organizer.

19. A closure according to claim 18 wherein the fiber organizer comprises a base attached to the fiber routing panel, a lid movably attached to the base for movement between an opened position and a closed position, and a plurality of hook elements that define spaced apart rows for separating and guiding the input optical fiber and the output optical fibers, the lid securing the input optical fiber and the output optical fibers between the rows of hook elements when the lid is moved to the closed position.

20. A closure according to claim 14 further comprising a fiber storage area adjacent a third one of the mounting defined by the frame for storing a slack length of the feeder cable.

21. A closure according to claim 20 wherein the fiber storage area comprises a slack storage basket having at least one flange for retaining the slack length of the feeder cable.

22. A closure according to claim 20 wherein the second mounting surface adjacent the fiber management area and the third mounting surface adjacent the fiber storage area are generally parallel and spaced apart.

23. A closure according to claim 14 further comprising a fiber connecting area adjacent a fourth one of the mounting surface defined by the frame.

24. A closure according to claim 14 wherein the output optical fibers are pre-connectorized drop cables.

25. A closure according to claim 23 wherein the fiber connecting area comprises at least one fanout kit having a plurality of fanout connectors for interconnecting the output optical fibers with a plurality of optical fibers of drop cables.

26. A closure according to claim 23 wherein the fiber connecting area comprises a splice tray for interconnecting output optical fibers with a plurality of optical fibers of drop cables.

27. A closure for interconnecting an input optical fiber with a plurality of output optical fibers, the closure comprising:

a frame defining a longitudinal axis;

a housing affixed to the frame and having at least one opening therethrough for receiving the input optical fiber and at least one opening therethrough for receiving the output optical fibers;

a fiber coupling area comprising a plurality of coupler modules for splitting an optical signal carried by the input optical fiber into two or more optical signals carried by the output optical fibers, the coupler modules removable attached to a first mounting surface defined by the longitudinal axis and is not parallel to the longitudinal axis;

a fiber management area for routing the input optical fiber to the fiber coupling area and for routing the output optical fibers from the fiber coupling area, the fiber management area adjacent a second mounting surface defined by the frame that is parallel to the longitudinal axis and is not parallel to the first mounting surface; and

a fiber organizer for separating and guiding the output optical fibers comprising

a base defining a mounting surface; and

a plurality of hook elements attached to the mounting surface and arranged in spaced apart rows to receive the output optical fibers therebetween;

wherein the input optical fiber and the output optical fibers are connectorized; and

wherein each of the coupler modules comprises a plurality of adapters for receiving the connectorized input optical fiber and the connectorized output optical fibers, the adapters mounted on the coupler modules and arranged in a linear array that is parallel to the longitudinal axis.

28. A closure according to claim 27 wherein the output optical fibers are pre-connectorized drop cables.

29. A closure according to claim 27 further comprising a lid movably attached to the base for movement between an opened position and a closed position, the lid securing the output optical fibers between the rows of hook elements when the lid is moved to the closed position.

30. A closure according to claim 29 wherein the lid comprises a lip and the base comprises a protruding latch and wherein the lip of the lid engages the latch of the base when the lid is moved to the closed position.