Abstract:
A method of retrofitting an existing patching system with an intelligent patching module includes the steps of: providing at least one patching shelf unit populated with interconnection sites, the shelf unit including a rear face and an opposing front side; routing a cable between a rear location located rearward of the rear face and the front side; connecting the cable to the intelligent patching module; and attaching the intelligent patching module to the shelf unit.

Description:
RELATED APPLICATION 
     This application claims priority from U.S. Provisional Patent Application No. 61/158,500, filed Mar. 9, 2009, the disclosure of which is hereby incorporated herein in its entirety. 
    
    
     FIELD OF THE INVENTION 
     The present invention is directed generally to communication patching systems, and more particularly to shelf units for communication patch systems. 
     BACKGROUND 
     Common communication patching systems include multiple patching shelves mounted on two upright mounting rails. Such shelves typically include multiple patching sites for the interconnection of communication cables and patch cords. Also, each of the shelves typically includes a cover that separates the shelf from its neighboring shelves. When densely populated, the patching system has relatively little available space. 
     Patching systems have been developed that are “intelligent” in that they include functionality that enables the system to track the interconnections of the various cables and cords. One such system is sold by CommScope, Inc. under the trademark iPATCH®. Some existing non-intelligent systems may be retrofitted with intelligent functionality through the attachment of one or more components (see, e.g., the “iPATCH Ready Kit”, available from CommScope, Inc., Hickory, N.C.). In order to connect the components of the retrofitting kit, it is typically necessary to connect the additional components to a ribbon cable or other cord or cable that extends between the rear face of the patching system and the front. In a densely populated shelf, unless current connections are disconnected, it can be very difficult to thread the ribbon cable along this path given the dearth of available space within the shelf. 
     SUMMARY OF THE INVENTION 
     As a first aspect, embodiments of the present invention are directed to a method of retrofitting an existing patching system with an intelligent patching module. The method comprises the steps of: providing at least one patching shelf unit populated with interconnection sites, the shelf unit including a rear face and an opposing front side; routing a cable between a rear location located rearward of the rear face and the front side; connecting the cable to the intelligent patching module; and attaching the intelligent patching module to the shelf unit. 
     In some embodiments, the cable is routed between the rear and front location by engaging the cable with an engagement structure of a shelf cover that overlies the shelf unit, then sliding the shelf cover between a retracted position and an extended position. 
     As a second aspect, embodiments of the invention are directed to a telecommunication patching system, comprising: a communication rack; and a patching shelf unit mounted to the communication rack. The patch shelf unit is populated with interconnection sites. The shelf unit comprises a shelf cover that is positioned above the interconnection sites, a rear face, and a front side opposite the rear face. The shelf cover includes an engagement projection, the engagement projection projecting rearwardly of the rear face of the shelf unit and configured to engage and capture a communication cable, such as a ribbon cable. 
     As a third aspect, embodiments of the present invention are directed to a patching shelf unit, comprising: a plurality of interconnection sites; a rear face; and a shelf cover positioned above the plurality of interconnection sites. The shelf cover includes a substantially planar body portion and an engagement projection attached to the rear edge of the body portion that projects rearwardly of the rear face. 
    
    
     
       BRIEF DESCRIPTION OF THE FIGURES 
         FIG. 1  is a perspective view of a patching system with a conversion kit according to embodiments of the present invention, with shelves containing patching sites mounted on mounting rails. 
         FIG. 2  is an exploded perspective view of the patch system of  FIG. 1 . 
         FIG. 3  is a rear perspective view of the patching system of  FIG. 1  with the shelf cover in a retracted position such that the hook extends beyond the rear face of the patching system. 
         FIG. 4  is a rear perspective view of the patching system of  FIG. 1  with the shelf cover in a retracted position and a ribbon cable engaged and captured by the hook in the cover. 
         FIG. 5  is a perspective view of the patching system of  FIG. 1  with the shelf cover of the conversion kit in or beyond an extended position in which the captured ribbon cable has been drawn through the shelf unit. 
         FIG. 6  is a perspective view of the patching system of  FIG. 1  showing the attachment of the ribbon cable to an intelligent patching module. 
         FIG. 7  is a perspective view of the patching system of  FIG. 1  with the intelligent patching module mounted to the front of the shelf unit. 
     
    
    
     DETAILED DESCRIPTION 
     The present invention will be described more particularly hereinafter with reference to the accompanying drawings. The invention is not intended to be limited to the illustrated embodiments; rather, these embodiments are intended to fully and completely disclose the invention to those skilled in this art. In the drawings, like numbers refer to like elements throughout. Thicknesses and dimensions of some components may be exaggerated for clarity. 
     Well-known functions or constructions may not be described in detail for brevity and/or clarity. 
     Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the description of the invention and the appended claims, the singular forms “a”, “an” and “the” are intended to include the plural forms as well, unless the context clearly indicates otherwise. As used herein, the term “and/or” includes any and all combinations of one or more of the associated listed items. Where used, the terms “attached”, “connected”, “interconnected”, “contacting”, “coupled”, “mounted,” “overlying” and the like can mean either direct or indirect attachment or contact between elements, unless stated otherwise. 
     The sequence of operations (or steps) is not limited to the order presented in the claims or figures unless specifically indicated otherwise. 
     Referring now to the figures, a communication patching system, designated broadly at  10 , is shown in  FIG. 1 . The system  10  includes a rack  11  having a pair of uprights  12  on which are mounted three patching shelf units  14   a ,  14   b ,  14   c . Each of the shelf units  14   a ,  14   b ,  14   c  includes a floor  16  and a rear face  19  (see  FIG. 3 ). Each shelf unit  14   a ,  14   b ,  14   c  also has a plurality of patching or interconnection sites  18  (in the illustrated embodiment, the patching sites  18  are provided by a patch panel  17  mounted to the front of the shelf unit  14   b ; however, in other embodiments, the patching sites  18  may take other forms. Those skilled in this art will also recognize that a communication cabinet may be used in place of the rack  11 ; the terms “rack” and “cabinet” are intended to be interchangeable as used herein. 
     Referring now to  FIG. 2 , each of the shelf units  14   a ,  14   b ,  14   c  has a substantially planar cover  20  that is positioned a top the shelf unit and separates a lower shelf unit from the shelf unit positioned immediately above (e.g., shelf cover  20  separates shelf unit  14   b  from shelf unit  14   a ). The shelf cover  20  is positioned above the interconnection sites  18 . As can be seen in  FIG. 2 , the shelf cover  20  of the shelf unit  14   b  has a hook  22  that projects rearwardly from the rear edge of the body portion  21  of the cover  20  for shelf unit  14   b . The hook  22  has two tines  24  that are substantially coplanar with the remainder of the cover  20 ; the tines  24  are separated from each other and from the remainder of the cover  20  by gaps  26 . The tines  24  and gaps  26  are arranged to engage and capture a ribbon cable  32  (see  FIG. 4 ). As shown in  FIG. 3 , when the cover  20  is in place, the hook  22  projects rearwardly beyond the rear face  19  of the shelf unit  14   b.    
     The shelf cover  20  can be employed in either of two ways. In one technique, the cover  20  is first inserted into the shelf unit  14   b  in the retracted position of  FIG. 3  and the ribbon cable  32  is engaged on the hook  22  by threading the ribbon cable  32  through the tines  24  of the hook  22  ( FIG. 4 ). Subsequent sliding of the cover  20  forwardly to a forward extended position (as shown in  FIG. 5 ) has the effect of drawing the engaged end of the ribbon cable  32  from a location rearward of the rear face  19  through the shelf cavity, even when the shelf  14   b  is densely populated. The end of the ribbon cable  32  can then be grasped by a technician forward of the rear face  19  and connected to an intelligent patching module  30  ( FIG. 6 ) that is then mounted onto the front of the shelf unit  14   b  ( FIG. 7 ). Exemplary intelligent patching modules include the SYSTIMAX 360™ iPatch® Panel Manager; the iPatch® Rack Manager Plus; and the SYSTIMAX 360™ iPatch® 1100GS3 Panel, each of which is available from CommScope, Inc., Hickory, N.C. 
     In the second technique, the cover  20  can be removed by sliding it forwardly of the extended position of  FIG. 5 . One end of the ribbon cable  32  is engaged on the hook  22 , and the cover  20  is re-inserted into the shelf unit  14   b  and slid into the retracted position of  FIG. 4 . Doing so threads the engaged end of the ribbon cable  32  through the densely populated shelf unit  14   b.    
     With either technique, upon completion the ribbon cable  32  is routed from the back face of the shelf unit  14   b  to the front of the shelf unit  14   b , where it can be connected with an intelligent patching module  30 . Such routing can be accomplished without the disconnection of numerous connections on the shelf unit  14   b.    
     Notably, during the routing of the ribbon cable  32 , the ribbon cable  32  may rest on the upper surface of the cover  20 . This position can be advantageous in that it prevents contact and possible snagging between the ribbon cable  32  and connections already present in the shelf unit  14   b , which snagging could disconnect the connections or otherwise harm these components. 
     Those skilled in this art will appreciate that engagement structures on the cover  20  for engaging the ribbon cable  32 , such as hooks of different configurations, pincers, eyelets, T-bars and other extensions, and the like may be also be employed in place of the hook  22 . In addition, other techniques for connecting the intelligent patching components, including routing the cable differently (e.g., over the cover  20  or within a channel formed in the cover  20 ) may also be employed. 
     The foregoing is illustrative of the present invention and is not to be construed as limiting thereof. Although exemplary embodiments of this invention have been described, those skilled in the art will readily appreciate that many modifications are possible in the exemplary embodiments without materially departing from the novel teachings and advantages of this invention. Accordingly, all such modifications are intended to be included within the scope of this invention.