Tether assembly having individual connector ports

• US 20060120672A1
• Filed: 12/03/2004
• Published: 06/08/2006
• Est. Priority Date: 12/03/2004
• Status: Active Grant

• Current Assignee: Corning Optical Communications LLC (Corning Incorporated)
• Original Assignee: Corning Cable Systems LLC (Corning Incorporated)
• Inventors: Cody, Joseph T., Szentesi, Otto I., Curran, Martin J.
• Granted Patent: US 7,277,614 B2
• Time in Patent Office: Days
• US Class Current: 385/86
• CPC Class Codes: G02B 6/3807 Dismountable connectors, i.e. comprising plugs
• CPC Class Codes: G02B 6/3849 using mechanical protective elements, e.g. caps, hoods, sealing membranes G02B6/3816 takes precedence; provisionally see H01R13/44
• CPC Class Codes: G02B 6/3897 Connectors fixed to housings, casing, frames or circuit boards G02B6/44528 takes precedence
• CPC Class Codes: G02B 6/4472 Manifolds

Abstract

A tether assembly includes a tether cable containing optical fibers and adapted to be attached to a fiber optic distribution cable at a mid-span access location. A furcation at the end of the tether cable separates and transitions the optical fibers into furcation legs terminating in individual connector ports. Each connector port may be a receptacle for receiving a connector mounted upon one of the optical fibers and a mating connector of a drop cable, a plug mounted upon one of the optical fibers that is received within a plug alignment member operable to align the plug with a mating plug of a drop cable, or a connector that is routed to a receptacle disposed within an external wall of a network connection terminal from within the enclosure. The tether assembly provides a distribution cable assembly and method for mitigating a span length measurement difference in a pre-engineered communications network.

Claims

1. A tether assembly for a fiber optic cable, comprising:

a tether cable having a first end adapted to be attached to the fiber optic cable and a second end, the tether cable containing a plurality of optical fibers optically connected to a corresponding plurality of optical fibers accessed and terminated from the fiber optic cable;

a furcation at the second end of the tether cable for separating the optical fibers of the tether cable and transitioning the optical fibers into at least one furcation leg, the furcation leg having a first end attached to the furcation and a second end;

at least one individual connector port at the second end of the furcation leg for providing access to at least one of the plurality of optical fibers of the tether cable optically connected to the plurality of optical fibers accessed and terminated from the fiber optic cable.

2. The tether assembly of claim 1, wherein the connector port comprises a receptacle for receiving a connectorized fiber optic drop cable and optically connecting at least one optical fiber of the connectorized fiber optic drop cable with the at least one of the plurality of optical fibers of the tether cable.

3. The tether assembly of claim 1, wherein the connector port comprises a plug that is received within a plug alignment member operable for aligning the plug with a mating plug of a connectorized fiber optic drop cable.

4. The tether assembly of claim 1, wherein the connector port comprises a fiber optic connector mounted upon the end of the at least one of the plurality of optical fibers of the tether cable that is received within a receptacle disposed within an external wall of a network connection terminal.

5. The tether assembly of claim 1, wherein the tether cable is attached to the fiber optic cable at a mid-span access location and the at least one connector port is routed to a desired location in a fiber optic communications network.

6. The tether assembly of claim 1, wherein the at least one connector port is covered by a protective dust cap during shipping and deployment and until the connector port is needed to interconnect the at least one optical fiber of the plurality of optical fibers of the tether cable with an optical fiber of a connectorized drop cable.

7. The tether assembly of claim 1, wherein the tether assembly is factory-prepared and the optical fibers of the tether cable are splice-ready at the first end of the tether cable so that the tether assembly is configured to be optically connected to the fiber optic cable in the field.

8. The tether assembly of claim 1, wherein the tether assembly is factory-prepared and the optical fibers of the tether cable are connectorized at the first end of the tether cable so that the tether assembly is configured to be optically connected to the fiber optic cable in the field.

9. The tether assembly of claim 1, wherein the furcation is secured within a first opening defined by an external wall of a network connection terminal and the at least one connector port is routed to a second opening defined by the external wall from within the network connection terminal.

10. The tether assembly of claim 1, further comprising a pulling member that protects the at least one connector port during shipping and deployment of the tether assembly.

11. The tether assembly of claim 1, wherein at least one of the furcation and the connector port are overmolded on the furcation leg.

12. A tether assembly adapted to be attached to a fiber optic distribution cable at a mid-span access location to interconnect a plurality of optical fibers accessed and terminated from the distribution cable at the mid-span access location to at least one optical fiber of a connectorized fiber optic drop cable, comprising:

a tether cable containing a plurality of optical fibers and having a first end and a second end;

a furcation at the second end of the tether cable at which the plurality of optical fibers of the tether cable are separated;

at least one furcation leg containing at least one of the optical fibers of the tether cable separated by the furcation at the second end of the tether cable, the furcation leg having a first end adjacent the furcation and a second end; and

at least one individual connector port at the second end of the furcation leg for optically connecting the at least one of the plurality of optical fibers of the tether cable with the at least one optical fiber of the connectorized fiber optic drop cable.

13. The tether assembly of claim 12, wherein the at least one connector port comprises a receptacle for receiving a connector mounted upon the end of the at least one of the plurality of optical fibers of the tether cable and a mating connector mounted upon the end of the at least one optical fiber of the connectorized fiber optic drop cable.

14. The tether assembly of claim 12, wherein the at least one connector port comprises a plug that is received within a plug alignment member operable for aligning the plug with a mating plug of the connectorized fiber optic drop cable.

15. The tether assembly of claim 12, wherein the at least one connector port comprises a fiber optic connector mounted upon the end of the at least one of the plurality of optical fibers of the tether cable.

16. The tether assembly of claim 15, wherein the furcation is secured within a first opening defined by an external wall of a network connection terminal and the at least one connector port is routed to a second opening defined by the external wall from within the network connection terminal.

17. The tether assembly of claim 12, wherein the at least one furcation leg comprises a plurality of furcation legs each terminating in a corresponding one of the at least one connector ports, the furcation legs having different lengths so that the connector ports are staggered to thereby reduce the outer diameter of the fiber optic distribution cable and the tether assembly.

18. A fiber optic distribution cable assembly, comprising:

p1 a distribution cable containing a plurality of optical fibers and at least one mid-span access location positioned along the length of the distribution cable, at least one optical fiber of the plurality of optical fibers being accessed and terminated from the distribution cable at the mid-span access location;

a tether cable containing at least one optical fiber and having a first end adapted to be attached to the distribution cable at the mid-span access location and a second end, the at least one optical fiber being optically connected to the at least one optical fiber accessed and terminated from the distribution cable;

a furcation at the second end of the tether cable at which the at least one optical fiber of the tether cable is transitioned into at least one furcation leg having a first end adjacent the furcation and a second end; and

at least one individual connector port at the second end of the furcation leg for providing access to optically connect the at least one optical fiber of the tether cable with at least one optical fiber of a fiber optic drop cable.

19. The fiber optic distribution cable assembly of claim 18, wherein the at least one connector port comprises a receptacle operable for receiving a connector mounted upon the end of the at least one optical fiber of the tether cable and an opposing connector mounted upon the fiber optic drop cable to optically connect the at least one optical fiber of the connectorized fiber optic drop cable with the at least one optical fiber accessed and terminated from the distribution cable.

20. The fiber optic distribution cable assembly of claim 18, wherein the at least one connector port comprises a plug that is received within a plug alignment member operable for aligning the plug with a mating plug mounted upon the fiber optic drop cable.

21. The fiber optic distribution cable assembly of claim 18, wherein the at least one connector port comprises a fiber optic connector mounted upon the end of the at least one optical fiber of the tether cable and wherein the furcation is secured within a first opening defined by an external wall of a network connection terminal and the at least one connector port is routed to a second opening defined by the external wall from within the network connection terminal.

22. The fiber optic distribution cable assembly of claim 18, wherein the tether cable is factory-prepared and the optical fibers of the tether cable are splice-ready at the first end of the tether cable so that the tether cable is configured to be optically connected to the fiber optic distribution cable at the mid-span access location in the field.

23. The fiber optic distribution cable assembly of claim 18, wherein the tether cable is factory-prepared and the optical fibers of the tether cable are connectorized at the first end of the tether cable so that the tether cable is configured to be optically connected to the fiber optic distribution cable at the mid-span access location in the field.

24. The fiber optic distribution cable assembly of claim 18, wherein at least one of the furcation and the connector port are overmolded on the furcation leg.

25. A method for mitigating a span length measurement difference in a pre-engineered fiber optic communications network employing a fiber optic distribution cable assembly comprising a distribution cable having a plurality of optical fibers and at least one mid-span access location along the length of the distribution cable at which at least one of the plurality of optical fibers is terminated from the distribution cable, the method comprising:

optically connecting a tether assembly to the distribution cable, the tether assembly comprising a tether cable adapted to be attached to the distribution cable at the mid-span access location and containing at least one optical fiber optically connected to the at least one optical fiber terminated from the distribution cable, the tether cable having a first end and a second end terminating in at least one individual connector port for providing access to the at least one optical fiber of the tether cable optically connected to the terminated optical fiber of the distribution cable; and

positioning the at least one connector port at a desired location in the fiber optic communications network to compensate for the span length measurement difference.

26. The method of claim 25, wherein the at least one connector port comprises a receptacle operable for receiving a connector mounted upon the end of the at least one optical fiber of the tether cable and an opposing connector mounted upon a fiber optic drop cable to optically connect the at least one optical fiber of the connectorized fiber optic drop cable with the at least one optical fiber terminated from the distribution cable.

27. The method of claim 25, wherein the at least one connector port comprises a plug that is received within a plug alignment member operable for securing and aligning the plug with a mating plug mounted upon a connectorized fiber optic drop cable.

28. The method of claim 25, wherein the at least one connector port comprises a fiber optic connector mounted upon the end of the at least one optical fiber of the tether cable and wherein the furcation is secured within a first opening defined by an external wall of a network connection terminal and the at least one connector port is routed to a second opening defined by the external wall from within the network connection terminal.