Optical network architecture and terminals for use in such networks

• US 7,444,056 B2
• Filed: 10/20/2005
• Issued: 10/28/2008
• Est. Priority Date: 05/31/2005
• Status: Active Grant

• Current Assignee: CommScope Technologies, LLC (CommScope Holding Company, Inc.)
• Original Assignee: Tyco Electronics Corporation (TE Connectivity Limited)
• Inventors: Braga, David J., Allen, Barry
• Primary Examiner(s): Font; Frank G
• Assistant Examiner(s): WONG, ERIC K
• Application Number:
  US11/254,899
• Publication Number:
  US 20060269208A1
• Time in Patent Office: 1,104 Days
• Field of Search: None
• US Class Current: 385/135
• CPC Class Codes: G02B 6/3878 comprising a plurality of ferrules, branching and break-out means
• CPC Class Codes: G02B 6/4471 Terminating devices demountable connectors G02B6/3807; Cable clamps
• CPC Class Codes: G02B 6/44715 Fan-out devices

Abstract

A terminal for connecting customers to an optical fiber network includes a terminal housing and an optical fiber splitter in the housing. An optical fiber cable stub extends from the housing. The optical fiber cable stub has an optical fiber extending therein that is coupled to the splitter in the housing. A plurality of termination connectors are connected to the housing. Ones of the termination connectors have a customer optical fiber connection point accessible from outside the terminal housing and respective optical fibers extending in the housing from the termination connectors to the splitter. The splitter is configured to couple the optical fiber from the optical fiber cable stub to the optical fibers extending from the termination connectors to couple a single optical fiber from the optical fiber cable stub to a plurality of customer optical fiber connection points.

Claims

1. A terminal for connecting customers to an optical fiber network, the terminal comprising:

a terminal housing;

an optical fiber splitter in the housing;

an optical fiber cable stub extending from the housing, the optical fiber cable stub having an optical fiber extending therein and coupled to the splitter in the housing;

a plurality of termination connectors connected to the housing, ones of the termination connectors having a customer optical fiber connection point accessible from outside the terminal housing and respective optical fibers extending in the housing from the termination connectors to the splitter;

wherein the splitter is configured to couple the optical fiber from the optical fiber cable stub to the optical fibers extending from the termination connectors to couple a single optical fiber from the optical fiber cable stub to a plurality of customer optical fiber connection points.

2. The terminal of claim 1 wherein the optical fiber cable stub further comprises a termination connector on an end thereof removed from the terminal housing, the termination connector being configured to optically couple the optical fiber extending in the optical fiber cable stub to the optical fiber network.

3. The terminal of claim 2 wherein the termination connector is configured to connect the optical fiber extending in the optical fiber cable stub to a distribution closure of the optical fiber network.

4. The terminal of claim 2 wherein the optical fiber cable stub includes only a single optical fiber extending therein.

5. The terminal of claim 1 wherein the respective customer optical fiber connection points comprise an end of the termination connectors extending from the termination housing and being configured to couple to an individual customer premise line to provide service to a customer.

6. The terminal of claim 1 wherein the terminal housing comprises an environmentally sealed housing and wherein the ends of the termination connectors extending from the housing include a seal member that seals the termination connector when a customer premise line is not coupled thereto and wherein the ends of the termination connectors extending from the housing are configured to sealingly couple to a customer premise line coupled thereto to maintain environmental sealing of the housing.

7. The terminal of claim 1 wherein the plurality of termination connectors comprises four and/or eight termination connectors, each of which is coupled to a single optical fiber extending in the optical fiber cable stub.

8. The terminal of claim 1 wherein the optical splitter comprises a non-symmetrical splitter and wherein one of the termination connectors comprises a pass through port having an optical fiber extending therefrom to the splitter configured to carry a plurality of customer signals.

9. The terminal of claim 8 further comprising an additional terminal having its optical fiber cable stub coupled to the pass through port.

17. The terminal of claim 1 wherein the respective optical fibers extending from the termination connectors are coupled to an output side of the optical fiber splitter and the optical fiber from the optical fiber cable stub is coupled to an input side of the optical fiber splitter.

18. The terminal of claim 1 wherein the optical fiber splitter is entirely contained within the terminal housing.

19. The terminal of claim 1 wherein the termination connectors are connected to a side of the terminal housing displaced from a side of the terminal housing having the optical fiber cable stub extending therefrom.

20. The terminal of claim 1 wherein the respective optical fibers extending from the termination connectors extend flexibly and independently from the termination connectors to an output side of the optical fiber splitter.

24. The terminal of claim 1 wherein the respective optical fibers extending from the customer termination connectors extend flexibly and independently from the customer termination connectors to an output side of the optical fiber splitter.

10. An optical fiber distribution system, comprising:

means for selectively changing a number of optical ports for connecting to customer premises coupled to a single fiber extending to a distribution closure; and

at least one optical fiber of the optical fiber distribution system extending to the distribution closure.

11. The system of claim 10, further comprising means for changing a portion of a capacity of at least one fiber extending from a central office of the optical fiber distribution system allocated to the single fiber extending to the distribution closure based on the changed number of optical ports.

12. The system of claim 11 wherein the means for changing a portion of a capacity of at least one fiber comprises an optical splitter cabinet including a splitter and/or a non-symmetric splitter.

13. The system of claim 10 wherein the means for selectively changing a number of optical ports includes a terminal having a splitter therein configured to couple a plurality of customer connection points of the terminal to a single optical fiber having an end configured to be coupled to the distribution closure.

14. The system of claim 13 wherein the means for selectively changing a number of optical ports further includes an optical splitter cabinet having a connector field for selectively coupling the single fiber extending to the distribution closure to a fiber extending from the optical splitter cabinet to a central office of the optical fiber distribution system.

15. A terminal for connecting customers to an optical fiber network, the terminal comprising:

a terminal housing;

an optical fiber splitter in the housing;

an optical fiber cable connector member extending from the housing and having a network termination connector on an end thereof removed from the terminal housing that is configured to optically couple to the optical fiber network, the optical fiber cable connector member having an optical fiber extending therein that couples the network termination connector to the splitter in the housing;

a plurality of customer termination connectors connected to the housing, ones of the customer termination connectors having a customer optical fiber connection point accessible from outside the terminal housing and respective optical fibers extending in the housing from the customer termination connectors to the splitter;

wherein the splitter is configured to couple the optical fiber from the network termination connector to the optical fibers extending from the customer termination connectors to couple a single optical fiber from the network termination connector to a plurality of customer optical fiber connection points.

16. The terminal of claim 15 wherein the terminal housing comprises an environmentally sealed housing and wherein the ends of the customer termination connectors extending from the housing include a seal member that seals the customer termination connector when a customer premise line is not coupled thereto and wherein the ends of the customer termination connectors extending from the housing are configured to sealingly couple to a customer premise line coupled thereto to maintain environmental sealing of the housing.

21. The terminal of claim 15 wherein the respective optical fibers extending from the customer termination connectors are coupled to an output side of the splitter and the optical fiber from the network termination connector is coupled to an input side of the splitter.

22. The terminal of claim 15 wherein the optical fiber splitter is entirely contained within the terminal housing.

23. The terminal of claim 15 wherein the customer termination connectors are connected to a side of the terminal housing displaced from a side of the terminal housing having the optical fiber cable connector member extending therefrom.