Local convergence cabinet

• US 6,792,191 B1
• Filed: 04/22/2003
• Issued: 09/14/2004
• Est. Priority Date: 04/22/2003
• Status: Expired due to Term

• Current Assignee: Corning Optical Communications LLC (Corning Incorporated)
• Original Assignee: Corning Cable Systems LLC (Corning Incorporated)
• Inventors: Strause, Kevin L., Clapp, Donnie R. Jr., Smith, Kelly J.
• Primary Examiner(s): NGUYEN, KHIEM M
• Application Number:
  US10/420,687
• Time in Patent Office: 511 Days
• Field of Search: 385/134, 385/135, 385/136, 385/137
• US Class Current: 385/135
• CPC Class Codes: G02B 6/4452 Distribution frames
• CPC Class Codes: G02B 6/44524 with frame parts or auxiliary devices mounted on the frame and collectively not covering a whole width of the frame or rack cassettes G02B6/4453
• CPC Class Codes: G02B 6/44528 Patch-cords; Connector arrangements in the system or in the box routing arrangements H04Q1/00

Abstract

An outdoor cabinet interconnects an optical fiber of a feeder cable with at least two optical fibers of a distribution cable at a local convergence point in an optical network. The cabinet defines an interior compartment comprising a feeder cable side having a feeder cable entry port and a feeder cable slack storage area, a distribution cable side having a distribution cable entry port and a distribution cable slack storage area, at least one splice tray and at least one coupler module. A feeder pigtail is routed from the splice tray and connected to an adapter provided on the coupler module. At least two distribution pigtails are routed from the splice tray and connected to adapters provided on the coupler module. The coupler module splits an optical signal carried on the optical fiber of the feeder cable into optical signals carried on the optical fibers of the distribution cable.

Claims

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

a cabinet defining a vertical direction, a lateral direction and an interior compartment comprising a feeder cable side and a distribution cable side positioned laterally adjacent the feeder cable side;

at least one feeder cable port in communication with the interior compartment and defining at least one opening therethrough for receiving the feeder cable;

at least one distribution cable port in communication with the interior compartment and defining at least one opening therethrough for receiving the distribution cable;

a feeder cable slack storage area for storing slack lengths of the feeder cable within the feeder cable side of the interior compartment;

a distribution cable slack storage area for storing slack lengths of the distribution cable within the distribution cable side of the interior compartment;

a fiber splicing area comprising at least one splice tray for splicing the optical fiber of the feeder cable to a feeder pigtail and the optical fibers of the distribution cable to distribution pigtails; and

a fiber coupling area comprising at least one coupler module for splitting an optical signal carried by the feeder pigtail into optical signals carried by the distribution pigtails.

2. An enclosure according to claim 1 wherein the feeder pigtail and the distribution pigtails are connectorized and wherein the coupler module comprises a feeder adapter for receiving the feeder pigtail and a pair of distribution adapters for receiving the distribution pigtails.

3. An enclosure according to claim 2 wherein the fiber coupling area comprises a plurality of coupler modules each removably attached to a coupler module housing.

4. An enclosure according to claim 3 wherein each of the coupler modules is retained within the coupler module housing such that the coupler modules are generally parallel to the vertical direction defined by the cabinet and generally perpendicular to the lateral direction defined by the cabinet.

5. An enclosure according to claim 3 wherein at least one of the coupler modules comprises two feeder adapters and eight distribution adapters.

6. An enclosure according to claim 3 wherein at least one of the coupler modules comprises two feeder adapters and sixteen duplex distribution adapters.

7. An enclosure according to claim 1 further comprising at least one feeder radius control guide for routing a slack length of the feeder pigtail between the splice tray and the coupler module and at least one distribution radius control guide for routing slack lengths of the distribution pigtails between the splice tray and the coupler module.

8. An enclosure according to claim 1 further comprising at least one feeder routing guide for guiding the feeder pigtail between the splice tray and the coupler module and at least one distribution routing guide for guiding the distribution pigtails between the splice tray and the coupler module.

9. An enclosure according to claim 8 wherein the fiber coupling area comprises a plurality of coupler modules installed within a coupler module housing defining a lower row of the coupler modules and an upper row of the coupler modules and wherein a plurality of the feeder routing guides are located between the lower row and the upper row and wherein a plurality of the distribution routing guides are located below the lower row and above the upper row.

10. An enclosure according to claim 1 wherein the feeder cable side and the distribution cable side are located in a lower portion of the interior compartment and wherein the splice tray and the coupler module are located in an upper portion of the interior compartment.

11. An enclosure according to claim 1 wherein the splice tray comprises at least one feeder splice tray for splicing the optical fiber of the feeder cable to the feeder pigtail within the feeder cable side of the interior compartment and at least one distribution splice tray for splicing the optical fibers of the distribution cable to the distribution pigtails within the distribution cable side of the interior compartment.

12. An enclosure according to claim 1 wherein the cabinet comprises a lower wall, a pair of laterally spaced side walls, an upper wall spaced from the lower wall by the side walls and a back wall.

13. An enclosure according to claim 12 wherein the feeder cable side is located adjacent one of the side walls and the distribution cable side is located adjacent the other side wall.

14. An enclosure according to claim 12 further comprising a base removably attached to the lower wall of the cabinet and wherein the feeder cable port and the distribution cable port are each in communication with the base and the cabinet.

15. An enclosure for splitting an optical signal carried by an input optical fiber of a first fiber optic cable into optical signals carried by two or more output optical fibers of at least one second fiber optic cable and for interconnecting the input optical fiber and the output optical fibers, the enclosure comprising:

a cabinet defining a vertical direction, a lateral direction and an interior compartment;

a cable entry area comprising a cable port in communication with the interior compartment and defining at least one opening therethrough adapted for receiving the first fiber optic cable and the second fiber optic cable;

a cable slack storage area adapted for storing slack lengths of the first fiber optic cable and the second fiber optic;

a fiber splicing area comprising at least one splice tray for splicing the input optical fiber of the first fiber optic cable to a first pigtail and splicing the output optical fibers of the at least one distribution cable to second pigtails; and

a fiber coupling area comprising at least one coupler module for splitting an optical signal carried by the first pigtail into optical signals carried by the second pigtails;

wherein the cable entry area and the cable slack storage area are located in a lower portion of the cabinet and the fiber splicing area and the fiber coupling area are located in an upper portion of the cabinet spaced vertically from the lower portion.

16. An enclosure according to claim 15 wherein the cable entry area comprises a first cable port and a second cable port spaced laterally from the first cable port and wherein the cable slack storage area comprises a first cable slack storage area for storing slack lengths of the first fiber optic cable and a second cable slack storage area for storing slack lengths of the second fiber optic cable, the second cable slack storage area spaced laterally from the first cable slack storage area.

17. An enclosure according to claim 15 wherein the fiber coupling area comprises a plurality of coupler modules removably attached to a coupler module housing.

18. An enclosure according to claim 15 wherein the input optical fiber and the output optical fibers are pre-connectorized and wherein the coupler module comprises a plurality of adapters for receiving the pre-connectorized input optical fiber and the pre-connectorized output optical fibers.

19. An enclosure according to claim 15 wherein the first fiber optic cable is a feeder cable and the input optical fiber is a pre-connectorized feeder pigtail and wherein the at least one second fiber optic cable is a distribution cable and the output optical fibers are pre-connectorized distribution pigtails.

20. A method for interconnecting an optical fiber of a feeder cable and at least two optical fibers of a distribution cable, the feeder cable comprising at least one feeder buffer tube comprising the optical fiber of the feeder cable and the distribution cable comprising at least one distribution buffer tube comprising the two optical fibers of the distribution cable, the method comprising:

providing a cabinet defining an interior compartment and comprising at least one cable entry port, at least one splice tray and at least one coupler module;

routing the feeder cable and the distribution cable through the cable entry port into the interior compartment;

routing the feeder buffer tube of the feeder cable from the cable entry port to the splice tray and routing the distribution buffer tube of the distribution cable from the cable entry port to the splice tray;

splicing the optical fiber of the feeder cable to a feeder pigtail and slicing the optical fibers of the distribution cable to distribution pigtails;

routing the feeder pigtail and the distribution pigtails to the coupler module; and

using the coupler module to split an optical signal carried by the optical fiber of the feeder cable into optical signals carried by the optical fibers of the distribution cable.