Abstract:
A connection panel for enabling quick change over of a network device comprises a body and an engaging device. An exterior side of the body has multiple sockets, each of which can receive a plug connector. The panel is configured for positioning at one end of a rack space for the network device. The panel&#39;s interior side has first network device connections configured to mate with second network device connections on the network device. The engaging device has at least one member extending between the network device and the panel, and is repositionable between at least an engaged position in which the network device is moved towards and mechanically coupled to the panel with the second network device connections urged into engagement with and electrically connected to the first connections, and a disengaged position in which the network device is disengaged from the panel and removable from the rack space.

Description:
BACKGROUND 
     Data centers and other similar installations include racks or cabinets of different network devices that are typically interconnected by cords, cables or other similar connections. In the case of a server rack, one type of network device is a top of rack switch that establishes a connection to internal and/or external networks, including connections for the other network devices of the rack. Top of rack switches can fail or otherwise require changing out, such as for maintenance or repair. Typically, there is no redundancy for the functionality of a top of rack switch, so reducing downtime in changing out the switch is advantageous. But the switch can have 10, 20 or even a greater number of cords connected to it, and each of these cords needs to be unplugged from the current switch and plugged into the correct location in the new switch, which is time consuming. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a perspective view of top, front and left sides of a typical server rack cabinet showing a top of rack switch being readily removed from the rear of the rack through use of a new first connection panel, as well as a new second connection panel for use with another network device (the connection panels are shown removed from their installed positions for the sake of illustration). 
         FIG. 2A  is a perspective view showing the exterior side of the first connection panel of  FIG. 1 , and several connections to the panel. 
         FIG. 2B  is a section view in elevation of the panel of  FIG. 2A  showing a plug connector extending through a socket. 
         FIG. 3  is a perspective view showing the interior side of the first connection panel. 
         FIG. 4A  is a perspective view showing the interior side of the second connection panel. 
         FIG. 4B  is a section view in elevation of the panel of  FIG. 4A  showing a separate connector connected to the plug connector and extending from an interior side. 
         FIG. 4C  is a perspective view showing the interior side of the second connection panel according to another implementation. 
         FIG. 4D  is a section view in elevation of the panel of  FIG. 4C  showing a separate SFP+ connector connected to the plug connector and extending from an interior side. 
         FIG. 5  is a perspective view showing a connection panel in relation to a panel engaging device extending from a switch for connecting the connection panel to the switch. 
         FIGS. 6-8  are side, top and rear views, respectively, showing a portion of a network component being installed into a rack space and having a cam arrangement for moving the network component into engagement with a connection panel mounted at an opposite end of the rack space. 
     
    
    
     DETAILED DESCRIPTION 
     Described below are implementations of a connection member, referred to as a connection panel, and associated methods used in making quick changeovers of electronic components having multiple individually wired connections, such as network devices in a server rack (including servers, switches and other components). An exterior side of the panel has multiple sockets, each shaped to receive a plug connector for one of the wired connections. The opposite or interior side of the panel has first network device connections configured for mating with second network device connections on one of the network devices, such as a server, switch or other network device. The first network device connections on the interior side of the panel are defined by protruding ends of the plug connectors positioned to extend through the panel, or as separate connections electrically connected to the plug connectors. Such separate connections can be protruding circuit board connectors configured for connection to edge connectors on the network device or protruding plug connectors (of the same or a different type), which are described below in more detail, or another suitable type of connector. 
     During use, the panel is fixed in place at one end of a slot or space in the rack for the corresponding network device (such as adjacent the front side of the rack). There is a panel engaging device on the network device having a member engageable with the panel to move the network device into its installed position and to urge the second connections on the network device together with the first connections on the panel. When the network device needs to be removed for replacement or service, the panel engaging device is released, and the network device can then be removed from the slot in the rack, typically from the rear side of the rack, while the panel remains in place with the plug connectors engaged with the connection panel. A replacement or repaired network device need only be inserted into the slot and re-engaged with the connection panel. Because there is no need to disengage and remove each plug connector from the network device, considerable time is saved and the potential for mis-wiring is avoided. 
       FIG. 1  is a perspective view of a server rack, such as a conventional 19-inch rack, having a cabinet  10  for holding multiple server computers  20  (also called servers or host devices), one or more top of rack switches  30 , one or more other switches  40  and/or other similar network device(s) in a stacked arrangement. At least some of the network devices in a typical server rack are electrically connected to other network devices in the same rack or in another location by cables or cords, typically with ends having plug connections allowing for repeated insertion and removal (portions of representative patch cords  112  are shown in  FIG. 1  for the sake of illustration). There is a connection panel  100  according to a first type shown for the sake of illustration spaced from its installed position at a forward end of a top slot for a first network device, which in this case is a top of rack switch  30 . The top of rack switch  30  is shown immediately after having been disengaged from the panel  100  and removed from a rear side of the slot. Immediately below, a second instance of the connection panel is shown in the second position in the rack to illustrate the installed position of the connection panels. The connection panels can be held in place using any suitable approach, such as, e.g., conventional EIA plates. At an intermediate rack position, there is a connection panel  100 ′ according to a second type shown in relation to a second network device, in this case, a switch  40 . 
     Referring to  FIGS. 2A, 2B and 3 , the connection panel  100  is illustrated in more detail (the connection panel  100 ′ is similar in many respects, and its different characteristics are described below). The connection panel  100  has a body  102  with an exterior side  104  (visible in  FIGS. 1 and 2A ) and an interior side  106  (visible in  FIG. 3 ). On the exterior side  104 , multiple sockets  108  are defined to receive plug connectors  110  at the ends of respective patch cords. In  FIG. 1 , there are six plug connectors received in six corresponding sockets. In the enlarged perspective view of  FIG. 2A , four plug connectors  110  are shown inserted in four of the sockets  108 , and two of the plug connectors  110  are shown spaced apart from their respective sockets  108 , e.g., as they would be positioned directly before they are inserted or removed. Each of the connectors  110  extends from a flexible cord  112  and forms the end of a patch cord. 
     In the panel  100 , the plug connectors  110  extend through the sockets  108  and protrude from the interior side  106 , as shown in  FIGS. 2A and 3 . Protruding ends  118  of the plug connectors  110  form first network device connections  116  on the panel  100 . These first network device connections  116  are designed to connect with second network device connections  120  ( FIGS. 1 and 5 ) on the network device. 
     In the illustrated implementations, the plug connectors  110  are conventional plug connections, but the panel  100 , the sockets  108  and the other structural elements could be configured to work with a plug connections having one or more custom configurations. In the illustrated implementations, the plug connectors  110  are conventional SFP+ connectors, also called modules, having an outer housing with a length several times greater than a major dimension of its cross section, which is generally rectangular. SFP+ connections are enhanced small form-factor pluggable connections for transceiver modules. Conventional SFP+ connectors and cables are available from a number of different suppliers, including Molex and Cisco, among others. 
     An SFP+ connector or module typically has a retainer mechanism operable to retain it in a receiving socket on a network device. As is well known, the retainer can comprise one or more teeth or tabs that protrude from one of the sides of the module to engage with one or more corresponding recesses in the receiving socket to retain the module in position and prevent it from being pulled or pushed longitudinally. The teeth or tabs can be withdrawn from their protruding position to allow the module to be moved longitudinally and removed from the socket. The retainer also comprises an actuator, such as a latch, clasp, bail, button, pull tab or other element, that is manually actuatable by a user, to move the teeth or tabs or otherwise disengage the module from the socket and allow it to be removed. 
     Although the top of rack switch  30  has been shown with only six sockets for clarity, other top of rack switches may have 10, 20 or even more sockets, and each socket may be occupied by a required plug connector. As described, in the case of SFP+ modules and most other similar connector technologies, removing the plug connector requires manually actuating an actuator, such as of one of the types described above. Changing out the top of rack switch requires disengaging and re-engaging each plug connector, and thus may require 20, 40 or even more manipulations, which can take a trained operator five minutes or more, especially to ensure that all connections are made completely and accurately. In the case of the top of rack switch in some network configurations, this can mean a loss of connectivity for five minutes or more, which can be problematic. 
     Using the panel  100 ,  100 ′, however, requires far fewer operations and thus allows for much faster changeovers of a switch or other network device. Instead of individually disengaging each plug connector from each socket of the network device and then individually re-engaging it with the new network device, the panel  100 ,  100 ′ is disengaged from the network device, and then the panel is re-engaged with the replacement network device, with the plug connectors  110  remaining engaged with the panel throughout the process. Thus, the plug connectors do not need to be disengaged and removed and then inserted and re-engaged. 
       FIG. 2B  is a section view in elevation showing one of the plug connectors  110  engaged in one of the sockets  108  of the panel  100 . The socket  108  is configured to have one or more recesses  122  configured to receive one or more projections  124  of the plug connector  110 . The projections  124  may be biased toward the engaged position as shown in which they protrude from the plug connector and extend into the recess. The projections  124  are movable to a disengaged position in which they are retracted within the plug connector  110  by actuation of an actuator, which is shown schematically at block element  126 . In this way, the plug connectors  108  can be connected to and removed from the connection panel  100 ,  100 ′ in the same way they are connected and removed from a conventional network device. 
       FIG. 4A  is a perspective view showing the interior side of the connection panel  100 ′, which has a different configuration that the interior side of the connection panel  100 . In the connection panel  100 ′, the first network device connections  116 ′ are separate connectors that are fixed in place in or on the interior side  106 ′. The first network device connections  116 ′ are electrically connected to any corresponding plug connectors  100  present in the corresponding sockets  108  by an internal conductor(s), which is shown schematically at  119  in  FIG. 4B  within the panel  100 ′. In the illustrated implementation, the first network device connections  116 ′ can be projecting edge connectors  121  of a circuit board, as one example. Correspondingly, the second network device connections on the network device can be edge sockets (not shown) configured to receive the edge connectors  121 . The panel  100 ′ can have a greater depth dimension than the panel  100  as shown, or other geometries can be implemented. Circuit board edge connections are advantageous because they are fairly inexpensive to implement and durable, but other types of connections could also be used to achieve the same result. It would be possible to implement a connection panel that has some connections made according to the panel  100  approach and others according to the panel  100 ′ approach. 
       FIG. 4C  is a perspective view showing the interior side of a connection panel  100 ″, which is similar to the connection panel  100 ′ of  FIG. 4A , but has first network connections  116 ″ that are separate connectors of the SFP+ type instead of the edge connector type. Thus, the projecting connectors  127  have the same general geometry as at least the ends of the plug connectors  110 . As shown in  FIG. 4D , the projecting connectors  127  are electrically connected to the plug connectors  110  by the internal conductors  119 , similar to the connection panel  100 ′ shown in  FIGS. 4A and 4B . 
       FIG. 5  is a perspective view of the panel  100  in relation to a network device  128  to show one representative implementation of a panel engaging device  130  operable to engage and disengage the network device from the panel. Although  FIG. 5  illustrates the configuration of the connection panel  100 , the same approach to the panel engaging device  130  can be used for the panel  100 ′, the panel  100 ″ and other panels. Engaging the network device  128  with the panel  100  is understood to mean aligning it, moving it toward the panel  100 , and establishing electrical connections between the second connections on the network device and the corresponding first connections on the panel, which typically entails urging the first and second connections together to overcome some minimal assembly force (and/or structural engagement) to secure them together. In the illustrated implementation, the panel engaging device  130  has a member  132  configured to span a space between the network device  128  and the panel  100  and to be manually actuatable to exert a force to urge them together. As illustrated, the member  132  extends from the network device  128  towards the connection panel  100  and has an engaging end  134  engageable with the panel, such as in a recess formed in the panel. An actuating end  136  of the member  132  on an opposite side of the network device  128  is accessible by a user. 
     If the member  132  is configured as a cam member as shown, then the user manipulates the actuating end  136  (such as by rotating it or pivoting it) to cause the engaging end  134  to engage the panel  100  and draw the network device  128  towards the panel or to disengage the network device and allow it to be removed. In the illustrated implementation, the panel engaging device  130  includes two separate members  132 , but one member or more than two members could be used, depending upon the specific requirements. If more than one member is used, each can be separately actuated, or the device can be configured with a single actuating element. In any event, the panel engaging device  130  serves to allow the network device  128  to be disengaged and removed, thereby permitting a replacement network device to be substituted, with far fewer manual operations and without requiring each plug connector  110  to be removed and then re-inserted. 
     In other implementations, the panel engaging device may be connected to the rack or other stationary network device (instead of or in conjunction with being connected to the network device). 
     As shown in the figures, the panel  100  may include one or more guide pins  125 . The guide pins  125  may be positioned at side edges of the panel  100  as shown. The guide pins  125  are preferably dimensioned to project at least slightly beyond the next longest projection from the interior surface  106  of the connection panel. In this way, the guide pins  125  can be positioned in guide pin apertures  127  in the network device  128  to facilitate aligning the network device  128  with the panel  100  before the first and second connections contact each other. It would of course be possible to reverse the positions of the guide pins and guide pin apertures, as well as to implement different complementary guide structures. For example, there may be additional guiding and/or alignment features, such as chamfered surfaces on the connectors and/or connection panel, drawer slide rail surfaces to guide the connection panel into engagement with the network device, as well as other similar features, some of which are discussed in greater detail below. 
     In addition to the sockets  108 , the panel can have one or more optional power sockets, with one such power socket  114  being shown in the figures. The power socket  114  can be a conventional IEC C13 power socket as shown or any other appropriate power connection. 
     As shown in  FIGS. 6-8 , a network device  200  may be provided with a rough alignment rails  202  along its opposite sides and sized to engage a corresponding groove or slot, referred to herein as a pocket  203  ( FIGS. 6 and 8 ), in the rack space for the network device  200 . The network device  200  is slid into place along the rough alignment rails  202  in the direction of the arrow, and then guide pins  225  (if present) of the panel  204  are received, before the panel engaging device  227  is engaged to couple the network device  200  and the panel  204  together. As best shown in  FIG. 7 , which is a view from above, the panel engaging device  227  can take the form of a cam  229  coupled to the network device  200  that has a distal engaging end  231  shaped to engage the rack or other stationary structure, such as through an opening  233  in the in the pocket  203 . The cam also has a hand lever  235  to allow a user to actuate it, and to exert sufficient force to engage/disengage multiple connectors. The hand lever  235  can be shaped as shown to have a storage position as shown in dashed lines within the plan of the network device  200 , including an optional locked position. 
     The disclosed methods, apparatus, and systems should not be construed as limiting in any way. Instead, the present disclosure is directed toward all novel and nonobvious features and aspects of the various disclosed embodiments, alone and in various combinations and subcombinations with one another. The disclosed methods, apparatus, and systems are not limited to any specific aspect or feature or combination thereof, nor do the disclosed embodiments require that any one or more specific advantages be present or problems be solved. 
     In view of the many possible embodiments to which the principles of the disclosed invention may be applied, it should be recognized that the illustrated embodiments are only preferred examples of the invention and should not be taken as limiting the scope of the invention. Rather, the scope of the invention is defined by the following claims. We therefore claim as our invention all that comes within the scope of these claims.