Abstract:
A cable breakout assembly is provided, including a feeder cable, a breakout structure having a first end threadedly engaged with a cable nut having a single-port cable gland through which the feeder cable extends, a central conduit which houses the sections of the feeder cable passing there through, and an opposed second end threadedly engaged with a cable nut having a multi-port cable gland, whose number of ports corresponds to the number of splices of the feeder cable. A plurality of environmentally sealed, flexible conduits are provided, each having a first end that interfaces with and extends from a respective port of the multi-port gland, and a second end adapted to interface with an external device, wherein each flexible conduit houses a respective spliced section of the feeder cable therein.

Description:
CROSS REFERENCE TO RELATED APPLICATIONS 
       [0001]    This application is a continuation of U.S. application Ser. No. 13/817,589, filed Feb. 19, 2013, which in turn is the National Stage of International Application No. PCT/EP2011/054276, filed Mar. 21, 2011, which in turn claims the benefit of Provisional Application No. 61/384,827, filed Sep. 21, 2010, the entireties of which are incorporated herein by reference. 
     
    
     FIELD OF THE INVENTION 
       [0002]    The present invention relates to a cable breakout assembly remote radio heads (RRH). 
       BACKGROUND OF THE INVENTION 
       [0003]    Radio heads and other equipment for amplifying and transmitting signals from antenna towers were traditionally positioned at the base of the tower in order to better facilitate the installation and maintenance thereof. However, there has been a problem with respect to the signal losses experienced and the power consumption involved in this configuration. 
         [0004]    So called remote radio heads (RRH) have become an important subsystem of todays new distributed base stations. The remote radio head in general contains the base station&#39;s RF circuitry plus analog-to-digital/digital-to-analog converters and up/down converters. RRHs may also have operation and management processing capabilities and a standardized optical interface to connect to the rest of the base station. Relocating the transmission and amplification components to the top of the tower served to reduce the signal losses and power requirements, however, even though the signal was run through the feeder cable extending up the tower, it was also necessary to run a DC power cable up the tower in order to boost the signal power to the individual amplifiers. Also, this type of prior art system required a separate feeder cable to be connected with the individual radio leads for each amplifier at the top of the tower. 
         [0005]    This construction presents problems in that a larger number of cables are required to run up the tower, which involves a number of cable pulls, and also undesirably occupies space on the tower. This is especially costly when one considers that the installation costs are increased with more cables, because installers typically charge per cable pull required, and the overall costs are increased because tower owners may charge by the number of cables. The added weight of numerous cables can be a drawback, as well as wind loading issues related to multiple-cable configurations on the tower. In addition, the use of more components introduces the potential for increased installation steps, and more maintenance issues associated with more connections. 
       SUMMARY OF THE INVENTION 
       [0006]    It is an object of the present invention to overcome the drawbacks associated with the prior art noted above. 
         [0007]    Accordingly, the present invention provides the ability to provide a single power feeder cable and associated assembly that can provide power to a number of individual amplifiers at the top of a radio (cell) tower. In addition, the invention offers the ability to exchange data with the RRH in a single cable. The construction according to the present invention reduces the number of cables extending up the tower and cable pulls, and reduces the number of connections required. At the top of the tower, a single feeder cable interfaces with a number of radio leads for amplifiers within an environmentally sealed container or through sealed, flexible conduits. 
         [0008]    According to one embodiment of the present invention, a cable breakout structure is provided. The number of breakouts is ultimately determined by the size of the feeder cable, where a larger feeder cable can provide a greater number of breakouts, as would be understood by those skilled in the art. For example, a 6-conductor feeder cable is spliced 3 times, so each splice section includes a hot, a neutral and a drain wire. The wires of each spliced section of the feeder cable is crimped together with two conductors and a drain wire of a respective radio cable at splice crimps that are made, for example, of thin plated copper. Each splice/crimp section is sealed with a shrink tube (e.g. a ½ inch shrink tube) that encloses the spliced/crimped portions and extends, at each end, over a portion of the cable jackets of the spliced feeder cable and the radio lead cables, respectively. In that manner, six individually sealed splice crimps are provided as an interface between one feeder cable and three separate radio leads. The overall area of the splice/crimp sections is also sealed, for example, within a shrink tube boot, which also overlaps, at its four ends, the feeder cable jacket and the cable jackets of the respective radio leads. 
         [0009]    This cable breakout section is then sealed within a cable breakout enclosure. The cable breakout enclosure is a hollow can structure having two separate portions, each of which includes an open end in communication with the space within the enclosure, and a substantially closed end. The closed end of the “bottom” or can portion includes a cable nut having a single cable gland, which is sealed with respect to the opening in the closed end of the bottom portion from which it extends, and through which the feeder cable extends. The single cable gland is ultimately environmentally sealed with respect to the jacket of the feeder cable. The closed end of the “top” or lid portion includes, in this case (see  FIGS. 1 ,  3  and  4 ), three separate cable nuts each having a single-port cable gland in sealed connection therewith and extending therefrom, and through which the respective radio leads each extend, each of which are ultimately environmentally sealed with respect to the radio lead cable jackets, the opposite ends of which are connected to a radio pig-tail connector to facilitate a direct connection at the tower top. It should be noted that the cable nut can also include a multi-port cable gland through which the respective radio leads extend, as shown, for example, in  FIG. 5 . 
         [0010]    The two open ends of the respective portions of the cable breakout enclosure are threaded together and sealed with a permanent bond adhesive, suitable examples of which include, but are not limited to, thread locker, adhesives, water blocks and gels. Thereby, the cable breakout enclosure provides further environmental protection and added mechanical stability for the cable breakout, and protects the cable breakout from experiencing potentially harmful flexing and reduces weakening or detachment of the spliced joints, for example. Three levels of sealing are thus provided in view of the importance of preventing moisture and contaminants from entering the cable breakout in order to prevent shorts and broken contacts, etc., so as to improve the performance and reliability of the cable breakout and the overall cell performance. 
         [0011]    The improved performance and reliability of the cable breakout assembly according to the present invention is also a cost effective solution, in that, for example, using a single feeder cable reduces installation costs (fewer cable pulls, fewer hoist grips, ground straps and support blocks) and tower fees (fewer cables) and, since service is needed less often, if at all, service and maintenance costs are reduced or prevented. In addition, the cable breakout assembly according to this embodiment of the present invention also enables the feeder cable to be supplied on reels at longer lengths (e.g., 200+ m), and provides a “plug and play” feature for direct deployment, with no tools required, which reduces the hardware and installation time. 
         [0012]    According to one aspect of the present invention, the cable breakout assembly includes a spool of feeder cable, a portion of a breakout enclosure (can) affixed to an end portion thereof at a location before the feeder cable is spliced, the sealed, splice/crimped breakout section, which is housed within the enclosure and which interfaces with the radio leads crimped thereto, and the radio lead extensions protruding from the other end of the breakout enclosure, which are fitted, for example, with connectors to enable the plug-and-play benefits of the present invention. 
         [0013]    According to another embodiment of the present invention, cable breakout structure is provided that also facilitates cable breakout from a single feeder cable running up the tower to multiple radio lead cables positioned at the top. The cable breakout according to this embodiment of the present invention is hereinafter referred to as a splice puck, and provides further advantages in that the size of the breakout is reduced, crimps are eliminated, the assembly is simplified and costs can be further reduced without sacrificing performance and reliability. In addition, a secure level of environmental protection is provided without the need for additional shrink tubes or boots or enclosure structures. 
         [0014]    The splice puck is a unitary structure having a central through bore and including three distinct portions, a threaded feeder cable side, a centre conduit portion, and a threaded cable breakout side. The outer diameter of the threaded feeder cable side and the threaded cable breakout side are substantially the same, whereas the centre conduit portion has a smaller outer diameter and includes four flat sides (see  FIGS. 7A and 7B ), and since the outer shape of the splice puck is that of an “H”, the shape facilitates the ability to easily and sufficiently secure the splice puck using a pipe clamp, for example, at the top of the tower. Additionally, the four flat surfaces at the centre of the centre conductor provide a necessary holding surface for use in connection with a wrench during assembly. 
         [0015]    The inner diameter of the threaded feeder cable side and the central conduit portion are substantially the same, whereas the inner diameter of the cable breakout side is larger than that of the other two aforementioned sections. The feeder cable side is adapted to threadedly engage a single-port cable gland through which the feeder cable passes, and which is environmentally sealed about the feeder cable using the cable gland features (e.g., includes silicone compression gasket that securely engages the cable jacket). The cable breakout side is adapted to threadedly engage a multi-port cable gland through which individual flexible conduits, which are sealed with a waterproof shrink tube over the outer surfaces thereof and which internally house the separated cable conductor sections, extend. The multi-port cable gland is environmentally sealed onto the respective flexible conduits in the same manner as noted above in connection with the environmental seal between the single-port gland and the feeder cable jacket. The use of individual cable glands is also possible if such use is determined to be advantageous for a particular application. 
         [0016]    The ends of the separated cable sections within each of the environmentally protected flexible conduits respectively mate with a device, such as an end of a high pin count Buccaneer connector, which is connected to radio lead cables at its other end. That is to say, in that construction, the Buccaneer connector serves as an interface between the separated feeder cable sections and the respective radio lead cables. Other devices or cables that can interface with the feeder cable sections within the flexible conduits include, but are not limited to Remote Radio Heads (RRH), antennas, Remote Electronic Tilt (RET) and other suitable connectors. 
         [0017]    According to another aspect of the second embodiment of the present invention, the cable breakout assembly includes a spool of feeder cable, the splice puck breakout structure affixed to an end portion thereof at a location before the feeder cable is split, and the flexible conduits protruding from the other end of the splice puck breakout structure, which are fitted, for example, with connectors to enable the plug-and-play benefits of the present invention. 
         [0018]    When not using a drain wire, grounding through the tube enclosure or splice puck would be maintained through the use of EMI/RFI cord grips. By using such cord grips, an electrical path through the outer shield of the cables (Feeder &amp; Radio Leads) is completed through the cord grip to the cable breakout structure “can” or splice puck. A full description of the EMI/RFI Cord Grips is given in the ContaClip website. 
         [0019]    In one embodiment, a cable breakout assembly according to the present invention comprises a feeder cable adapted to be spliced or separated into a plurality of sections, each section including at least a hot wire and a neutral wire. A plurality of radio leads corresponding to the plurality of feeder cable sections, joined to the respective spliced sections of the feeder cable at crimps or similar means. A breakout enclosure including a first portion having a closed end and an open end to enable access to an interior space thereof, a second portion having a closed end and an open end to enable access to an interior space thereof, a cable nut having a single port cable gland installed in and extending from the closed end of the first portion and through which the feeder cable extends, and one or more cable nuts each having at least a single-port cable gland, so that a total number of ports corresponds to the plurality of radio leads, installed in and extending from the closed end of the second portion and through which respective ends of the radio leads extend. A plurality of first environmental sealing structures enclosing each crimp between the spliced sections of the feeder cable and a respective radio lead, and a second environmental sealing structure enclosing each sealed crimp and extending over a portion of a cable jacket of the feeder cable just before the sealed crimps and portions of cable jackets of the respective radio leads just after the sealed crimps and defining a sealed, crimped cable breakout section. The open end of the first portion of the breakout enclosure is threadedly engaged with the open end of the second portion of the breakout enclosure and sealed with a sealant to enclose the sealed, crimped cable breakout section therein. Furthermore, the cable breakout assembly may comprise a feeder cable having a plurality of conductors and being adapted to be separated into a plurality of conductor sections, a breakout structure (splice puck) having a first end threadedly engaged with a cable nut having a single-port cable gland through which the feeder cable extends, a central conduit which houses the sections of the feeder cable passing there through, and an opposed second end threadedly engaged with a cable nut having a multi-port cable gland, whose number of ports corresponds to the number of splices of the feeder cable; and a plurality of flexible conduits, each having a first end that interfaces with and extends from a respective port of the multi-port gland, and a second end adapted to interface with an external device, each flexible conduit housing a respective spliced section of the feeder cable therein. 
         [0020]    A preferred cable breakout assembly according to the present invention in general comprises a breakout enclosure with a first end and a second end. A feeder cable is attached to the first end and at least two power feeder pigtail subassemblies are attached to the second end. Each power feeder pigtail subassembly comprises an electrical connector foreseen to be interconnected to a remote radio head. If appropriate the power feeder pigtail subassemblies can be hard wired to a RRH. In an embodiment, the first and the second end of the breakout enclosure are arranged opposite to each other at a distance spaced apart. If appropriate, the first and the second end can be arranged at an angle with respect to each other. A first axis of the feeder cable and second axis of the at least one pigtail subassembly are preferably arranged parallel to each other. Depending on the field of application, they can be arranged at an angle with respect to each other. In one embodiment, the distance between the first axis and the second axis is within a range of 0 to 20 centimeter (cm). In a preferred embodiment, the cable breakout assembly has a hybrid setup with at least one optical feeder pigtail subassemblies, whereby the number of optical feeder pigtail subassemblies corresponds to the number of power feeder pigtail subassemblies. 
         [0021]    Furthermore, a feeder cable according to the present invention comprises at least one first empty conduit (ductwork) foreseen to receive at least one optical fibre. The optical fibre is preferably displaceable within and relative to the first empty conduit. If appropriate for each optical fibre a single ductwork can be foreseen. In an embodiment, the first empty conduit ends in a secondary breakout structure in which at least one second empty conduit ends foreseen to receive at least one optical fibre. The second empty conduit is preferably arranged in general opposite to the first empty conduit with respect to the secondary breakout structure. Alternatively or in addition the feeder cable may comprises several first empty conduits, each directly ending in an optical connector of an optical pigtail subassembly. 
         [0022]    The breakout enclosure may comprise a bottom part and a top part which are interconnected to each other, e.g. by a thread or in an other manner. The bottom and the top part may be shaped cylindrical. The breakout enclosure may at least partially be filled with a casting resin. 
         [0023]    A cable breakout assembly according to the present invention normally comprises a hybrid cable assembly which preferably has factory terminated fibers and an integrated shielded power cable. It becomes possible to install the cable breakout assembly by plug and play installation whereby—in difference to the prior art—no field termination/wrapping/or other preparation is necessary. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0024]    For a better understanding of the present invention, please refer to the detailed description below read in connection with the accompanying drawings which should not be considered limiting to the invention described in the appended claims. The drawings are showing: 
           [0025]      FIG. 1  is an exploded, perspective assembly view of a cable breakout assembly according to the first embodiment of the present invention; 
           [0026]      FIG. 2  is a schematic cross-sectional view of the sealed splice/crimp portion of the assembly shown in  FIG. 1 ; 
           [0027]      FIG. 3  is a perspective assembly view of the breakout enclosure according to the first embodiment of the present invention, as shown in connections with  FIGS. 1-2 ; 
           [0028]      FIG. 4  is a perspective assembly view of the breakout enclosure according to  FIG. 3 , as assembled; 
           [0029]      FIG. 5  is an assembled view of a breakout assembly according to another aspect of the first embodiment of the present invention, wherein the top portion of the breakout enclosure is fitted with a plurality of cable glands through which the radio leads extend; 
           [0030]      FIG. 6  is a schematic side view of the cable breakout assembly referred to as a splice puck according to the second embodiment of the present invention; 
           [0031]      FIGS. 7A and 7B  are cross-sectional views of the splice puck breakout assembly shown in  FIG. 6 ; 
           [0032]      FIG. 8  shows a first embodiment of a hybrid cable breakout assembly in a first perspective view; 
           [0033]      FIG. 9  is the hybrid cable breakout assembly according to  FIG. 8  in a second perspective view; 
           [0034]      FIG. 10  shows Detail D according to  FIG. 8 ; 
           [0035]      FIG. 11  shows Detail E according to  FIG. 8 ; 
           [0036]      FIG. 12  shows a second embodiment of a hybrid cable breakout assembly in a perspective view; 
           [0037]      FIG. 13  shows a third embodiment of a hybrid cable breakout assembly; 
           [0038]      FIG. 14  shows a fourth embodiment of a cable breakout assembly. 
       
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
       [0039]    When nothing else is indicated similar parts are indicated with the same reference numerals. 
         [0040]      FIG. 1  is an exploded, perspective assembly view of a cable breakout assembly  100  according to the first embodiment of the present invention. The cable breakout assembly  100  includes a feeder conductor wire  1 , which is fed through a large cable gland  2  of a large cable nut  3  extending from the closed end of the bottom portion  4  of the breakout enclosure (can)  16 . The conductor feeder cable  1  is spliced, crimped with respective radio leads and sealed with shrink tubes, as denoted by numerals  5 - 9 . A shrink boot  11  is fitted over the sealed splice/crimp area denoted by reference numbers  5 - 9 . The crimped, sealed, radio lead sections are fed though three cable glands  12  of respective cable nuts  13  which extend from the closed end of the top portion  10  of the breakout enclosure (can). The respective radio leads are shrink sealed and color coded (as shown by reference numeral  14 ) and interface with the power feeder pigtail subassembly at reference numeral  15 , which are fitted with respective connector devices to enable plug and play connectivity. 
         [0041]      FIG. 2  is a schematic cross-sectional view of the sealed splice/crimp portion of the assembly shown in  FIG. 1 . 
         [0042]      FIG. 3  is a perspective assembly view of the breakout enclosure  16  according to the first embodiment of the present invention, as shown in connection with  FIGS. 1-2 . The breakout enclosure  16  comprises a bottom portion  4  which in a mounted position is threadedly engaged with a top portion  10  along a first axis  31 . In the shown embodiment the portions (tube and cap enclosure)  4 ,  10  of the breakout enclosure  16  are made of aluminum (e.g. black anodized with treaded interface). The cable glands are made of nickel plated brass with silicon inserts and seals (temp. rating −40 to 200° C., IP68 Nema 4x). While a first cable gland  2  is arranged coaxial to the first axis  31  second cable glands  12  are arranged offset to the first axis  31 . The axis of the first and the second cable glands  2 ,  12  are arranged parallel to each other.  FIG. 4  is a perspective assembly view of the breakout enclosure  16  according to  FIG. 3 , as assembled. Visible are the feeder cable/conductor  1 , the breakout enclosure  16  and three radio leads  14 . 
         [0043]      FIG. 5  is an assembled view of a breakout assembly  100  according to another aspect of the first embodiment of the present invention, wherein the top portion of the breakout enclosure is fitted with a cable nut having a multi-port cable gland through which the respective radio leads extend. An example of a 1 to 3 cable split construction of the feeder conductor wire  1  is schematically explained. 
         [0044]      FIG. 6  is a schematic side view of a cable breakout assembly referred to as a splice puck  200  according to the second embodiment of the present invention, and  FIGS. 7A and 7B  are cross-sectional views of the splice puck breakout assembly shown in  FIG. 6 . Suitable examples of materials for the splice puck  200  include, but are not limited to plastic, polycarbonate, nylon, aluminum, stainless steel and other suitable materials. The open cavity of the splice puck  200  can be filled with potting filler in a known manner, if desired, thereby eliminating the chance of environmental contamination. 
         [0045]    The conductor cable  1  is fed through a cable nut  3  having a single port cable gland  2  and into the input end  201  of the splice puck  200 . The conductors of the cable  1  are routed through the central conduit portion  202  of the splice puck  200  and into the breakout end  203  thereof, which is interfaced with a cable nut  204  having a multi-port cable gland  205 . The conductors of the cable  1  pass through the respective ports of the multi-port cable gland  205  and into respective flexible conduits  206 , which are sealed with waterproof shrink tubes  207  over the surfaces thereof. The sealed, flexible conduits  206 , made, for example, of stainless steel, aluminum, copper or plastic, and having the cable conductors housed therein are respectively connected to connector devices such as, but not limited to, Buccaneer connectors, RRH, RBT, antennas and other suitable connectors. 
         [0046]      FIGS. 8 and 9  are showing a partially cut, perspective assembly view of a cable breakout assembly  100  according to a further embodiment of the present invention.  FIG. 10  is showing Detail D and  FIG. 11  is showing detail E according to  FIG. 8 . 
         [0047]    The cable breakout assembly  100  includes a feeder conductor wire (feeder cable)  1 , which is fed through a large cable gland  2  of a large cable nut  3  extending from the closed end of the bottom portion  4  of the breakout enclosure (can)  16 . To offer a view at the inside the breakout closure  16  is displayed in a partially cut manner. The conductor feeder cable  1  has a hybrid configuration and comprises electrical wires  20  and glass fibers  21  within a cable sheath  17 . The electrical wires  20  of the feeder cable  1  are interconnected to electrical connectors  18  via pigtail subassemblies  15 . Depending on the field of application the electrical wires  20  can run continuously into the pigtail subassemblies  15 . Alternatively or in addition the electrical wires  20  can be spliced within the breakout enclosure  16 , e.g. a shrink boot is fitted over the sealed splice/crimp area. The crimped, sealed, radio lead sections are fed through four small cable glands  12  of respective small cable nuts  13  which extend from the closed end of the top portion  10  of the breakout enclosure (can)  16 . If appropriate the respective radio leads  14  are shrink sealed and color coded and interfaces with the power feeder pigtail subassembly  15 , which are fitted with respective connector devices  20  to enable plug and play connectivity. 
         [0048]    If appropriate, instead of connecting the connector devices  20  directly to thereto assigned RRHs for power supply, the connector devices  20  can be designed as standardized interfaces which are foreseen to be interconnected indirectly via a specific interface cable or connecting device adapted to the specific RRHs or devices. Therefore complete and standardized factory assembly of the cable breakout assembly  100  according to the present invention becomes even more simplified. 
         [0049]    As it can be seen the number of optical fibers  21  corresponds to the number of optical connectors  19  attached to the optical feeder pigtail subassemblies  22 . Each optical connector  19  is foreseen to be interconnected directly or indirectly to an associated RRH (not shown in detail) or another device. In a preferred embodiment the optical fibers  21  are not spliced (spliceless arrangement). Instead the feeder conductor cable  1  comprises at least one ductwork (first empty conduit)  23  which ends in the shown embodiment inside of the breakout enclosure  16 . The ductwork  23  is foreseen to receive one or several optical fibers  21 . Preferably the optical fibers  21  are displaceable with respect to the ductwork  23  in length direction such that the optical fibers  21  can be inserted at a later stage if necessary. If appropriate for each optical fibre  32  an individual ductwork  23  can be foreseen. If required the individual ductworks  23  can be spliced or continuously run into the optical feeder pigtail subassemblies  22 . Thereby it is not necessary to splice the optical fibers  21 . A further advantage is that the length and position of the optical fibers  21  arranged within the ductwork  23  can be adjusted after the device has been assembled. As it can be seen in  FIG. 8  in the shown embodiment the feeder cable  1 , the power feeder pigtail subassemblies  15  and the optical feeder pigtail subassemblies  22  are arranged at a distance a with respect to each other. 
         [0050]    As best visible in  FIG. 11  the shown embodiment the ductwork  23  ends in a secondary breakout structure  24  for the optical fibers  21 . In  FIG. 11  the invisible lines are shown in a dashed manner. The secondary breakout structure  24  is attached to one end of the breakout housing  16 . The secondary breakout structure  24  comprises a splice puck housing  25  in which the ductwork  23  from the feeder cable  1  ends on the inner side. The splice puck housing  25  reaches through an opening of the top portion  10  of the breakout enclosure  16 . On its inner end the splice puck housing  25  comprises an inner gland  26  to which the ductwork  23  is attached. The splice puck housing  25  encompasses a cavity  28  in which the ductwork  23  ends. At the opposite end of the cavity  28  an outer gland  27  is arranged to which here four second empty conduits (smaller empty conduits)  29  are attached. In the shown embodiment the ductwork (first empty conduit)  23  and the smaller conduits  29  are attached to the splice puck housing  25  by a casting compound  30 . Other methods to attach the empty conduits  23 ,  29  to the splice puck housing  25  are possible. 
         [0051]    In the shown embodiment the first empty conduit  23  is foreseen to receive four optical fibers  21  which are led into the cavity  26 . In the cavity  26  the optical fibers  21  are separated and each guided into one of the smaller empty conduits  29 . The separated fibers are then guided to the optical connectors  19  arranged at the distal end of the smaller empty conduits  29 . 
         [0052]    The splice puck housing  25  of the shown embodiment acts as cable gland for the optical fibers  21  with respect to the breakout enclosure  16 . If appropriate the splice puck housing  25  can be arranged within the breakout enclosure  16  and the smaller empty conduits  29  can be guided across the splice puck housing  25  by additional cable glands (not shown). 
         [0053]    Depending on the field of application the optical fibers  21  can be spliced alternatively or in addition. If appropriate at least one optical connector can be arranged at the inside of the breakout enclosure  16  to interconnect two optical fibers. However these solutions are disadvantageous with respect to the above described spliceless solution. 
         [0054]    The breakout enclosure  16  of the shown embodiment comprises an in general cylindrical bottom portion  4  which is arranged concentric along a first axis  31  to and sealing up with the in general cylindrical top portion  10  as described above. A second axis of the first cable gland  2  for the feeder cable  1  is arranged parallel to the third axis  33  of a second cable gland  12  and a fourth axis  34  of the splice puck housing  25  (or the additional cable glands for the empty conduits  29 ). By this arrangement negative bending especially of the optical fibers  21  can be avoided. In a preferred embodiment the third and the fourth axis  33 ,  34  of the at least one second cable gland  12  and the at least one splice puck housing  25  (or the additional cable glands for the optical fibers  21 ) are arranged in general parallel with respect to the first axis  31  of the splice puck housing  25 . However, as long as the bending of the optical fibre has not negative impact the first, the second and the fourth axis can be arranged at an angle with respect to each other. For example, depending on the field of application, an angle in the range of 0° to 90° is possible. This can be achieved when the second cable gland  12  and/or the secondary breakout structure  24  are arranged at an inclined section of the breakout enclosure  16 . 
         [0055]    With respect to the second axis more flexibility is given, because the electrical conductors are less sensitive regarding bending. For example, the second axis of the radio leads  14  can be arranged at an angle of 180° emerging from the breakout enclosure  16  next the first cable gland  2 . Depending on the field of application at least the third and the fourth axis  33 ,  34  are arranged within a radius of 15 cm with respect to the first axis  31 . 
         [0056]    In the shown embodiment at the pigtail sided end of the breakout enclosure  16 , a fastening eye  42  is attached which is for installation and/or transportation use. For example, it is possible to lift the cable breakout assembly  100  by attaching rope (not shown in detail) to the fastening eye  42 . 
         [0057]      FIG. 12  shows a further embodiment of the hybrid cable breakout assembly  100  according to the present invention. The general setup is similar to the cable breakout assembly according to  FIGS. 8-11 . With respect to the general explanations it is therefore referred to these Figs. The cable breakout assembly  100  comprises a different type of breakout enclosure  16  with a U-shaped frame  40  to which the first and second cable glands  2 ,  12  and the secondary breakout structure  24  are attached for mechanical stability. The inside of the frame  40  is filled with a casting resin  41  which encases and protects the electrical conductors  20  and their splices (not shown in detail). The casting resin  41  is shown in a partially cut manner, such that the encased electrical conductors and ductworks  23  of the optical fibers  21  are visible. If appropriate the large and the small cable glands  2 ,  12  can be made of casted material. 
         [0058]      FIGS. 13 and 14  are showing different embodiments of cable breakout assemblies  100  according to the present invention. The cable breakout assemblies  100  have a hybrid setup with electrical and optical connectors  18 ,  19 . The cable breakout assemblies  100  are normally manufactured with standardized lengths. As shown in  FIG. 14 , the standardized lengths (“x” meters) of the feeder cable  1  is, for example, 30, 60 or 90 Meters (m). Depending on the field of application, other dimensions are possible. At the front end, the feeder cable  1  ends in the breakout enclosure  16 . At the rear end, the optical fibers  21  end in standardized rear optical connectors  35  (e.g. LC-Connectors). The rear end of the feeder cable  1 , include the assembled rear optical connectors  35  and the electrical conductors  20  (not shown in  FIG. 15 ) can be protected by a pulling tube  36  which is put over the rear end and affixed to a base entry cable gland  37  attached to the cable sheet  17  of the feeding cable  1 . The cable breakout assembly  100  is preferably made in several configurations, e.g. with three, four or six optical feeder pigtail subassemblies  22  and a corresponding number of power feeder pigtail subassemblies  15 . Depending on the field of application, other numbers are possible. 
         [0059]    In addition to the above, the tables and diagrams following the abstract are furnished herewith to provide further data regarding specific technical details and beneficial attributes of the various components associated with the present invention, which constitutes part of the original disclosure and which can be used to support future specification descriptions and claims, if necessary. One skilled in the art should appreciate that modifications could be made with respect to the specific examples of the present invention described above without departing from the scope and objects thereof. 
       LIST OF DESIGNATIONS 
       [0000]    
       
         a Distance between feeder cable and pigtail subassemblies (x-Direction) 
           1  Feeder conductor wire/conductor cable/feeder cable 
           2  Large cable gland/first cable gland 
           3  Large cable nut/cable nut 
           4  Bottom portion (Breakout enclosure) 
           5 - 9  Splice, Crimpe, Shrink Tube 
           10  Top portion (Breakout enclosure) 
           11  Shrink Boot 
           12  Small cable gland (second cable gland) 
           13  Small cable nut 
           14  Radio Lead 
           15  Power feeder pigtail subassembly 
           16  Breakout enclosure (can) 
           17  Cable sheath (feeding cable) 
           18  Electrical connector 
           19  Optical connector 
           20  Electrical conductor 
           21  Glass fibre/Optical fibre 
           22  Optical feeder pigtail subassembly 
           23  Ductwork/first empty conduit 
           24  Secondary breakout structure 
           25  Splice puck housing 
           26  Inner gland 
           27  Outer gland 
           28  Cavity 
           29  Second empty conduits/Smaller Empty Conduit 
           30  Casting compound 
           31  First axis (breakout enclosure) 
           32  Second axis (of first cable gland) 
           33  Third axis (of second cable gland) 
           34  Fourth axis (of splice puck housing) 
           35  Rear optical connector 
           36  Pulling tube 
           37  Base entry cable gland 
           40  Frame 
           41  Casting resin 
           42  Fastening eye 
           100  Cable breakout assembly 
           200  Splice puck 
           201  Input end 
           202  Central conduit portion 
           203  Breakout end 
           204  Cable nut 
           205  Multi-port cable gland 
           206  Flexible conduits