US20050233640A1 - Module-less cross connect assembly - Google Patents
Module-less cross connect assembly Download PDFInfo
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- US20050233640A1 US20050233640A1 US11/011,484 US1148404A US2005233640A1 US 20050233640 A1 US20050233640 A1 US 20050233640A1 US 1148404 A US1148404 A US 1148404A US 2005233640 A1 US2005233640 A1 US 2005233640A1
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- assembly
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K5/00—Casings, cabinets or drawers for electric apparatus
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q1/00—Details of selecting apparatus or arrangements
- H04Q1/02—Constructional details
- H04Q1/023—Constructional details using sliding mechanisms for accessing the interior of the apparatus
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q1/00—Details of selecting apparatus or arrangements
- H04Q1/02—Constructional details
- H04Q1/15—Backplane arrangements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q2201/00—Constructional details of selecting arrangements
- H04Q2201/10—Housing details
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q2201/00—Constructional details of selecting arrangements
- H04Q2201/12—Printed circuits
Definitions
- the present invention relates to assemblies, and, in particular, the present invention relates to a telecommunication assembly that performs a telecommunication cross connect function without any cross connect module installed in the telecommunication assembly. Further included in the present invention is a “make before break” circuit connection that exists between the circuit board of each backplane and the card edge connector of each individual DSX module.
- a digital signal cross connect (DSX) module is a passive telecommunication module that is disposed between, and couples together two active sections of telecommunication network equipment.
- DSX modules function as test access points allowing users to monitor or reroute telecommunication signals running through the network equipment. Only occasionally does the need arise to test or reroute these signals.
- PCB backplane with permanently mounted connectors on the back, which serves as a back wall for each assembly, and removable jack modules that connect to the backplane.
- a major disadvantage with these assemblies is that if one circuit on the PCB backplane becomes inoperable, the entire PCB backplane must be removed and replaced. This replacement makes the entire assembly inoperable for a given amount of time.
- many assemblies cannot function without every jack module installed in the assembly because the single backplane is not closed circuited.
- the singular PCB backplane prevents jacks mounted thereon from easily coupling to the network equipment because they do not protrude outward in stair-step fashion without costly modifications to the connectors themselves.
- the assemblies do not have DSX module guides, which also act as structural supports, thereby resulting in fragile assemblies.
- Self-closing doors are also not provided in current DSX assemblies to protect the interior of the assemblies when a particular DSX module is absent from a slot.
- Current designs have a removable plate that screws or snaps into position when the DSX module is removed. This is very cumbersome and time consuming to operate.
- telecommunication assemblies of the present fail to provide a means for cross-connecting two different pieces of telecommunication equipment such as a multiplexor and a router when a module is not installed in the assembly. This failure is due to the cross connect in an out ports being contained within the module instead of the backplane. This lack of cross-connecting functionality adds costs and complexity to present telecommunication assemblies.
- a telecommunication assembly has a plurality of slots for receiving a plurality of modules therein.
- the telecommunication assembly couples to a telecommunication network and includes a plurality of distinct backplane circuit boards secured therein for each coupling to one of the plurality of modules.
- the invention is not limited thereto, but instead is more generally a backplane or module.
- the backplane may be a coaxial connection or any other type of make before you break module or arrangement.
- Each of the plurality of distinct backplane circuit boards include a bounding edge and a back side partially encompassed by the bounding edge.
- a plurality of first connectors are coupled to the back side for receiving a telecommunication signal from the telecommunication network, a front side is coupled to the back side, and a second connector is mounted on the front side and spaced apart from the at least one jack for coupling to one of the plurality of modules.
- the telecommunication assembly is operable with one or more of the plurality of distinct backplane circuit boards removed from the assembly. What's more, the back side of each of the plurality of distinct backplane circuit boards is stepped, staggering at least one of the plurality of first connectors for easy access.
- the plurality of first connectors are coupled to the back side and are mounted to the bounding edge of the each of the plurality of distinct backplane circuit boards.
- a pair of guide ridges are attached to the telecommunication assembly for guiding the plurality of distinct backplane circuit boards when installed in, and removed from, the telecommunication assembly. At least one notch is formed in the bounding edge of each of the plurality of distinct backplane circuit boards.
- a plurality of tines are coupled to the telecommunication assembly with at least one of the plurality of tines partially extending into one of the notches on the backplane circuit boards.
- a plurality of stops are disposed on the telecommunication assembly against which the bounding edge of each of the plurality of distinct backplane circuit boards abuts.
- a plurality of guide walls are disposed in the assembly for defining the plurality of slots, serving to guide each of the plurality of modules into the telecommunication assembly, and providing structural support to the telecommunication assembly.
- At least one projection or strip is disposed on each of the guide walls for aiding in guiding each of the plurality of modules into the telecommunication assembly.
- Each of the modules includes a flange mounted thereon for gripping by an operator.
- An aperture is disposed in the assembly for receiving a tab mounted on one of the modules upon insertion of each of the plurality of modules into one of the plurality of slots.
- each of the plurality of distinct backplane circuit boards are secured in parallel with one of the plurality of modules when inserted into one of the slots.
- backplanes or modules which are shown in the preferred embodiment to be circuit boards, are complete and operational without the front modules being inserted or operationally connected to the corresponding backplane.
- Still another feature of this invention is the operational connection between the front module (item 100 in the Figures) and the backplane is a make before you break connection, meaning that the operational connection between the two is made before the circuit is broken or interrupted.
- FIG. 1 is a front perspective view of a digital cross connect assembly, a module, and a backplane circuit board therefor of the present invention.
- FIG. 2 is a rear perspective view of a digital cross connect assembly, a module, and a backplane circuit board therefor of the present invention.
- FIG. 3 is a side elevational view of a guide wall of the present invention.
- FIG. 4 is a perspective view of the module inserted into the backplane circuit board of the present invention.
- FIG. 5 is a side elevational view of the module of the present invention.
- FIG. 6 is a perspective view of a card edge being inserted into a card edge connector of the backplane circuit board of the present invention.
- FIG. 7 is a perspective view of a leaf spring member of the present invention.
- FIG. 8 is a side elevational view of the backplane circuit board of the present invention.
- FIG. 9 is a rear elevational view of the backplane circuit board of the present invention.
- FIG. 10 is a circuit schematic of the backplane circuit board of the present invention.
- FIG. 11 is a side elevational view of two guide ridges of the present invention.
- FIG. 12 is a plan view of a spring hinge for a slot door of the present invention.
- FIG. 13 is a schematic view of the backplane circuit board coupled between a first and a second piece of network equipment.
- FIG. 1 Shown in FIG. 1 is a telecommunication assembly 10 , which is preferably a Digital Signal Cross Connect (DSX) assembly primarily constructed of metal, which has a first plate 12 , a second plate 14 , and two side walls 16 coupled between the first plate 12 and the second plate 14 . Extending in perpendicular fashion from each of the side walls 16 is a retention bracket 18 , as shown in FIGS. 1 and 2 , that has at least one attachment aperture 26 disposed therein for securing the telecommunication assembly 10 to a frame.
- DSX Digital Signal Cross Connect
- a telecommunication module 100 such as a Digital Signal Cross Connect (DSX) module, which is releasably secured within a panel for allowing communication between a piece of telecommunications equipment and a telecommunications network, such as a telephone network.
- DSX Digital Signal Cross Connect
- the DSX module is described in further detail in U.S. patent application Ser. No. 09/277,235, which is entitled “Telecommunication Jack Module Having Edge Mounted Jack and Switch Therefor” and that is wholly incorporated herein by reference.
- the present module 100 receives a DS-3 signal, which is at a frequency rate on the order of 44.736 megabits per second, but could be a lower frequency signal such as DS-1 on the order of 1.544 megabits per second or higher frequency signal such as a DS-4 on the order of 274.176 megabits per second.
- the module 100 includes a hard plastic casing 102 , preferably constructed of a thermo-plastic, to protect the contents of the module 100 .
- the module 100 has at least one jack such as a BNC for receiving a plug therein, but preferably has a plurality of WECO jacks including a first monitor jack 104 , an output jack 106 , an input jack 108 , and a second monitor jack 110 .
- the first monitor jack 104 and the second monitor jack 110 provide for the taking of samples of a signal from the telecommunications network and the output jack 106 and input jack 108 are for receiving the signal from, and inputting a signal to, the telecommunications network, respectively.
- At least one DSX module 100 is slid into a slot 28 of the panel assembly where it aligns with an individual PCB, which is connected to the network equipment, resulting in the DSX module 100 intruding or intercepting a telecommunication signal running through the network equipment.
- BNC jacks are referred to herein, the reference is by way of example only and any one of a number of currently known or to be developed jacks may be utilized within the contemplation of this invention, with no one in particular being necessary to practice this invention.
- this invention is not limited to four jacks, but instead may include others of a plurality, such as six jacks, for example. In a six-jack configuration, for example, additional jacks for cross-connect in and cross-connect out may be added to the module.
- a plurality of module guide walls 20 simultaneously direct the DSX module 100 upon insertion into the assembly and provide structural support for the assembly 10 .
- the present DSX module 100 is fully enclosed in the plastic casing 102 , which also provides the surface to guide the DSX module 100 into one of the slots 28 in the assembly 10 .
- one or more projections 24 such as those shown in FIG. 3 , or one or more horizontal strips 22 are disposed on each of the guide walls 20 , as shown in FIG. 1 , for aiding in guiding each of the plurality of modules 100 into the slots 28 of the telecommunication assembly 10 .
- the projections 24 and strips 22 are preferably pressed or stamped into the guide walls 20 and extended outward from the guide walls 20 a distance equal to the width of the hinges for the doors, as will be discussed below, such that the modules 100 have no interference when slid into a slot 28 .
- the guide walls 20 are preferably constructed of metal, such as stainless steel or tin.
- Each of the modules 100 includes a grip 114 mounted thereon for gripping by an operator, as shown in FIGS. 1, 4 , and 5 .
- a grip 114 Spaced apart from the grip 114 is a flange 118 , which is also gripped by the operator, and an integrally formed tab 120 .
- a retention aperture 112 is disposed in the assembly for receiving the tab 120 upon insertion of each of the plurality of modules 100 into one of the plurality of slots 28 .
- the grip 114 and flange 118 are squeezed toward one another thereby slidingly removing the tab 120 from the aperture disposed in the telecommunication assembly 10 as the module 100 is biased.
- the grip 114 , flange 118 , and tab 120 are constructed of a hard plastic, which is also preferably a thermoplastic similar to the casing 102 of the module 100 .
- a spring arrangement is created on the module 100 because the flange 118 and integrally formed tab 120 extend outward from the casing 102 of the module 100 .
- Each slot 28 in the assembly 10 has a self closing swing door 36 , as shown in FIG. 1 , which covers the front of the slot when a DSX module 100 is not installed in a particular slot, thereby preventing environmental elements such as dirt from entering therein.
- the doors 36 have spring hinges 90 , as shown in FIG. 12 , for returning the doors 36 back to their normally closed positions.
- a DSX module 100 is inserted into a slot 28
- the associated door 36 is held open by abutting the module 100 thereby allowing an operator to visually see that a module 100 is inserted into a particular slot 28 .
- One side of each door 36 has an integrally formed rod 36 a , which tapers at the top and bottom.
- Each of such tapered portions is inserted through one of the spring hinges 90 .
- An extension 92 protrudes from the top and bottom of each spring hinge 90 .
- the top extension is coupled to the assembly, while the bottom extension is biased against the swiveable door 36 .
- a spring force tension is created between the spring hinge 90 and the doors 36 upon insertion of a module 100 therein. This tension is relieved when the module 100 is removed from the slot 28 .
- the telecommunication assembly 10 couples to a telecommunication network and includes a plurality of distinct backplane circuit boards 80 secured therein for each coupling to one of the plurality of modules 100 .
- each of the plurality of distinct backplane circuit boards 80 include a bounding edge 94 and a back side 96 partially encompassed by the bounding edge 94 .
- a plurality of first connectors which are preferably BNC jacks 84 but could be any telecommunication adapter designed to attach to a circuit board such as a card edge connector 82 , WECO jack, or wire-wrap, are coupled to the back side 96 of the circuit board for receiving a telecommunication signal from the telecommunication network.
- the BNC jacks 84 may be such as those manufactured by the Amphenol Company, having a URL at http://www.Amphenol.com or those manufactured by the Molex Company, or equivalent.
- a front side 98 is integrally formed with the back side 96 , and a second connector is mounted on the front side 98 and spaced apart from the at least one jack 84 for coupling to one of the plurality of modules 100 .
- the second connector which is preferably a normally closed, card edge connector 82 but could also be a plurality of BNC jacks 84 , WECO jacks, or wire-wraps, is mounted on the PCB, as shown in FIGS. 4, 6 , 8 , and 9 .
- the card edge connector 82 receives a card edge 88 therein having electrical contacts on only one side of the edge 88 .
- the telecommunication signal loops through the normally closed, card edge connector 82 with negligible loss such that it can be monitored from either the first monitor jack 104 or the second monitor jack 110 .
- the present invention further provides a “make before break” feature wherein the connection or coupling of the card edge 88 of the module 100 to the card edge connector 82 is physically made before the operation of the normally closed circuit of the backplane circuit board 80 is broken.
- the circuit of each of the backplane circuit boards 80 such that the X-OUT port has continuity with the OUT port and the X-IN port has continuity with the IN port, as shown in FIGS. 10 and 13 .
- the signal from the IN port of network equipment 140 is terminated to the IN port of the backplane circuit board, the signal is transferred to the edge connector 82 via the PCB 80 .
- the edge connector 82 provides shorting terminals that pass the signal through the edge connector 82 when there is no module inserted within.
- the signal is transferred back to the X-IN port of the backplane circuit board via PCB 80 and finally to the OUT port of the first piece of equipment 130 .
- the signal from the OUT port of network equipment 140 is terminated to the OUT port of the backplane circuit board, the signal is transferred to the edge connector 82 via the PCB 80 .
- the edge connector 82 provides shorting terminals that pass the signal through the edge connector 82 when there is no module inserted within.
- the signal is transferred back to the X-OUT port of the backplane circuit board via PCB 80 and finally to the IN port of the first piece of equipment 130 .
- a significant feature of the present invention is that the telecommunication assembly 10 is operable with one or more of the plurality of distinct backplane circuit boards 80 removed from the assembly 10 . What's more, the back side 96 of each of the plurality of distinct backplane circuit boards 80 of the present invention is stepped, staggering at least one of the plurality of first connectors for easy access by an operator. This is best shown in FIGS. 6 and 8 .
- the plurality of BNC jacks 84 coupled to the back side 96 of the distinct backplane circuit boards 80 are mounted to the bounding edge 94 of the each of the plurality of distinct backplane circuit boards 80 .
- This mounting is preferably accomplished by two legs 30 extending from each BNC jack 84 and “pinching” the PCB by friction fit or being soldered to grounding pads on the backplane circuit board.
- a center conductor 38 press fits against a landing pad on one side of the circuit board. Shown in FIG. 10 is the circuit diagram for the backplane circuit boards 80 , coupling the card edge connector 82 to the BNC jacks 84 .
- each of the plurality of distinct backplane circuit boards 80 are secured in parallel with one of the plurality of modules 100 when inserted into one of the slots 28 .
- This allows for a maximum number of distinct backplane circuit boards 80 and associated modules 100 to be installed in a fixed space in the assembly.
- the edge mounted BNC jacks 84 instead of being board mounted, allow for the backplane circuit boards 80 to be no thicker than the diameter of the BNC jacks 84 further allowing for a maximum number of distinct backplane circuit boards 80 and associated modules 100 to be installed in a fixed space in the assembly 10 .
- At least one notch 86 is formed in the bounding edge 94 of each of the plurality of distinct backplane circuit boards 80 , as shown in FIGS. 1, 4 , and 6 .
- a plurality of tines 42 are coupled to the telecommunication assembly 10 with at least one of the plurality of tines 42 partially extending into the at least one notch 86 at such an angle that the tine 42 asserts little resistance as the backplane circuit board 80 is inserted into the assembly 10 and great resistance when the backplane circuit board 80 is removed from the assembly 10 .
- a screwdriver or extended implement is used to force the tine 42 from the notch 86 when the backplane circuit board 80 is removed from the assembly 10 .
- a leaf spring member 40 of the present invention has a plurality of apertures 44 for attaching the leaf spring member 40 to the assembly 10 .
- the plurality of tines 42 are integrally formed on the leaf spring member 40 .
- one leaf spring member 40 is attached to the lower half of the assembly 10 and another to the upper half of the assembly 10 such that a tine 42 extends into an upper and lower notch 86 in each of the backplane circuit boards 80 .
- a pair of guide ridges 34 are attached to the telecommunication assembly 10 for guiding the plurality of distinct backplane circuit boards 80 when installed in, and removed from, the telecommunication assembly 10 .
- the guide ridges 34 are preferably half-circle in shape, constructed of plastic or hard metal, and preferably there are two sets of guide ridges 34 for each backplane circuit board 80 with each set disposed on either side of the circuit board 80 .
- a plurality of metal or hard plastic stops 32 are disposed on the telecommunication assembly 10 against which the bounding edge 94 of each of the plurality of distinct backplane circuit boards 80 abuts.
- the plurality of stops 32 work most effectively when each of the distinct backplane circuit boards 80 are inserted into the front of the assembly, slid between the guide ridges 34 , and subsequently abut the given stop 32 .
- the guide ridges 34 and stop 32 are also preferably integrally formed with the assembly 10 .
- the distinct PCBs 80 are slidably received in parallel to each other in the telecommunication assembly 10 and centered to be in a parallel plane with an associated DSX module 100 .
- a plurality of BNC jacks 84 are mounted on each PCB 80 and protrude outward in stair-step fashion thereby allowing easy coupling to the network equipment.
- the PCBs 80 are individually removable. This is desirable to the operator because they do not need to fully load the telecommunication assembly 10 with PCBs until telecommunication network growth requires such.
- the individual PCBs 80 are shown that individually and in the aggregate form the backplane of the telecommunication assembly 10 . As stated previously, only one PCB 80 is needed for the telecommunication assembly 10 to be operational. Moreover, the present invention also provides a module-less feature such that the telecommunication assembly 10 is enabled to cross-connect two separate devices of networking equipment to each other without any of the modules 100 being installed in the assembly 10 .
- FIG. 13 shows two devices of networking equipment 130 , 140 , such as a router and a multiplexer, being cross-connected via a single backplane circuit board 80 .
- the two devices of networking equipment could be any devices capable of communicating with each other via electrical signals and that are commonly used in telephone copper networks.
- the In port on the first piece of networking equipment 130 is coupled to the X-OUT port on the backplane circuit board 80 , which, in turn, is connected to the OUT port that is also contained on the backplane circuit board 80 .
- the OUT port of the circuit board 80 is coupled to the Out port of the second piece of networking equipment 140 .
- the In port of the second piece of networking equipment 140 is coupled to the IN port of the backplane circuit board, which, in turn, is connected via the circuit board 80 to the X-IN port and finally to the Out port of the first piece of networking equipment 130 .
- the circuit diagram coupling the ports on the PCB 80 is also shown in FIG. 10 . Such cross-connecting occurs without the need of a module 100 being disposed in the telecommunication assembly 10 or connected via the card edge connector 82 to the PCB 80 . This function yields added versatility and greatly reduces costs over prior telecommunication assemblies.
Abstract
A telecommunication assembly having a plurality of slots for receiving a plurality of modules therein. The telecommunication assembly couples to a telecommunication network and includes a plurality of distinct backplane circuit boards secured therein for each coupling to one of the plurality of modules. Each of the plurality of distinct backplane circuit boards includes a bounding edge, a back side partially encompassed by the bounding edge, a plurality of first connectors coupled to the back side for receiving a telecommunication signal from the telecommunication network, a front side coupled to the back side, and a second connector mounted on the front side and spaced apart from the at least one jack for coupling to one of the plurality of modules. The telecommunication assembly is operable with one or more of the plurality of distinct backplane circuit boards removed from the assembly and the assembly allows for two pieces of telecommunications equipment to be connected without a module being installed in the assembly. In addition, a “make before break” circuit is provided between each backplane and coupling module.
Description
- This application is a Continuation-in-Part of co-pending U.S. patent application Ser. No. 09/282,344 titled “Telecommunication Assembly,” filed Mar. 31, 1999 and that claims priority of Provisional Patent Application No. 60/100,845 filed Sep. 18, 1998, and entitled “Digital Signal Cross Connect Panel Assembly and System.”
- In general, the present invention relates to assemblies, and, in particular, the present invention relates to a telecommunication assembly that performs a telecommunication cross connect function without any cross connect module installed in the telecommunication assembly. Further included in the present invention is a “make before break” circuit connection that exists between the circuit board of each backplane and the card edge connector of each individual DSX module.
- A digital signal cross connect (DSX) module is a passive telecommunication module that is disposed between, and couples together two active sections of telecommunication network equipment. DSX modules function as test access points allowing users to monitor or reroute telecommunication signals running through the network equipment. Only occasionally does the need arise to test or reroute these signals.
- Current telecommunication assemblies include a PCB backplane with permanently mounted connectors on the back, which serves as a back wall for each assembly, and removable jack modules that connect to the backplane. A major disadvantage with these assemblies is that if one circuit on the PCB backplane becomes inoperable, the entire PCB backplane must be removed and replaced. This replacement makes the entire assembly inoperable for a given amount of time. Moreover, it is very costly to replace the entire backplane when only one of its hundreds of circuits goes “bad.” In addition, many assemblies cannot function without every jack module installed in the assembly because the single backplane is not closed circuited. Further, the singular PCB backplane prevents jacks mounted thereon from easily coupling to the network equipment because they do not protrude outward in stair-step fashion without costly modifications to the connectors themselves.
- In addition, the assemblies do not have DSX module guides, which also act as structural supports, thereby resulting in fragile assemblies. Self-closing doors are also not provided in current DSX assemblies to protect the interior of the assemblies when a particular DSX module is absent from a slot. Current designs have a removable plate that screws or snaps into position when the DSX module is removed. This is very cumbersome and time consuming to operate.
- What's more, telecommunication assemblies of the present fail to provide a means for cross-connecting two different pieces of telecommunication equipment such as a multiplexor and a router when a module is not installed in the assembly. This failure is due to the cross connect in an out ports being contained within the module instead of the backplane. This lack of cross-connecting functionality adds costs and complexity to present telecommunication assemblies.
- Further lacking in present telecommunication assemblies is a “make before break” circuit connection that exists between the backplane, which may be a printed circuit board, and the card edge connector of each individual cross connect module.
- A telecommunication assembly is provided that has a plurality of slots for receiving a plurality of modules therein. The telecommunication assembly couples to a telecommunication network and includes a plurality of distinct backplane circuit boards secured therein for each coupling to one of the plurality of modules.
- While the preferred embodiment of the invention is utilizing a printed circuit board as the backplane, the invention is not limited thereto, but instead is more generally a backplane or module. For example, instead of a circuit board, the backplane may be a coaxial connection or any other type of make before you break module or arrangement.
- Each of the plurality of distinct backplane circuit boards include a bounding edge and a back side partially encompassed by the bounding edge. A plurality of first connectors are coupled to the back side for receiving a telecommunication signal from the telecommunication network, a front side is coupled to the back side, and a second connector is mounted on the front side and spaced apart from the at least one jack for coupling to one of the plurality of modules.
- The telecommunication assembly is operable with one or more of the plurality of distinct backplane circuit boards removed from the assembly. What's more, the back side of each of the plurality of distinct backplane circuit boards is stepped, staggering at least one of the plurality of first connectors for easy access. The plurality of first connectors are coupled to the back side and are mounted to the bounding edge of the each of the plurality of distinct backplane circuit boards.
- A pair of guide ridges are attached to the telecommunication assembly for guiding the plurality of distinct backplane circuit boards when installed in, and removed from, the telecommunication assembly. At least one notch is formed in the bounding edge of each of the plurality of distinct backplane circuit boards. A plurality of tines are coupled to the telecommunication assembly with at least one of the plurality of tines partially extending into one of the notches on the backplane circuit boards.
- A plurality of stops are disposed on the telecommunication assembly against which the bounding edge of each of the plurality of distinct backplane circuit boards abuts. A plurality of guide walls are disposed in the assembly for defining the plurality of slots, serving to guide each of the plurality of modules into the telecommunication assembly, and providing structural support to the telecommunication assembly.
- At least one projection or strip is disposed on each of the guide walls for aiding in guiding each of the plurality of modules into the telecommunication assembly. Each of the modules includes a flange mounted thereon for gripping by an operator. An aperture is disposed in the assembly for receiving a tab mounted on one of the modules upon insertion of each of the plurality of modules into one of the plurality of slots. Moreover, each of the plurality of distinct backplane circuit boards are secured in parallel with one of the plurality of modules when inserted into one of the slots.
- Another feature of this invention is that the backplanes or modules, which are shown in the preferred embodiment to be circuit boards, are complete and operational without the front modules being inserted or operationally connected to the corresponding backplane.
- Still another feature of this invention is the operational connection between the front module (
item 100 in the Figures) and the backplane is a make before you break connection, meaning that the operational connection between the two is made before the circuit is broken or interrupted. -
FIG. 1 is a front perspective view of a digital cross connect assembly, a module, and a backplane circuit board therefor of the present invention. -
FIG. 2 is a rear perspective view of a digital cross connect assembly, a module, and a backplane circuit board therefor of the present invention. -
FIG. 3 is a side elevational view of a guide wall of the present invention. -
FIG. 4 is a perspective view of the module inserted into the backplane circuit board of the present invention. -
FIG. 5 is a side elevational view of the module of the present invention. -
FIG. 6 is a perspective view of a card edge being inserted into a card edge connector of the backplane circuit board of the present invention. -
FIG. 7 is a perspective view of a leaf spring member of the present invention. -
FIG. 8 is a side elevational view of the backplane circuit board of the present invention. -
FIG. 9 is a rear elevational view of the backplane circuit board of the present invention. -
FIG. 10 is a circuit schematic of the backplane circuit board of the present invention. -
FIG. 11 is a side elevational view of two guide ridges of the present invention. -
FIG. 12 is a plan view of a spring hinge for a slot door of the present invention. -
FIG. 13 is a schematic view of the backplane circuit board coupled between a first and a second piece of network equipment. - The above and other features, aspects, and advantages of the present invention will now be discussed in the following detailed description and appended claims, which are to be considered in conjunction with the accompanying drawings in which identical reference characters designate like elements throughout the views. Shown in
FIG. 1 is atelecommunication assembly 10, which is preferably a Digital Signal Cross Connect (DSX) assembly primarily constructed of metal, which has afirst plate 12, asecond plate 14, and twoside walls 16 coupled between thefirst plate 12 and thesecond plate 14. Extending in perpendicular fashion from each of theside walls 16 is aretention bracket 18, as shown inFIGS. 1 and 2 , that has at least oneattachment aperture 26 disposed therein for securing thetelecommunication assembly 10 to a frame. - Shown in
FIGS. 1,4 , and 5, is atelecommunication module 100, such as a Digital Signal Cross Connect (DSX) module, which is releasably secured within a panel for allowing communication between a piece of telecommunications equipment and a telecommunications network, such as a telephone network. The DSX module is described in further detail in U.S. patent application Ser. No. 09/277,235, which is entitled “Telecommunication Jack Module Having Edge Mounted Jack and Switch Therefor” and that is wholly incorporated herein by reference. Preferably, thepresent module 100 receives a DS-3 signal, which is at a frequency rate on the order of 44.736 megabits per second, but could be a lower frequency signal such as DS-1 on the order of 1.544 megabits per second or higher frequency signal such as a DS-4 on the order of 274.176 megabits per second. Themodule 100 includes a hard plastic casing 102, preferably constructed of a thermo-plastic, to protect the contents of themodule 100. - The
module 100 has at least one jack such as a BNC for receiving a plug therein, but preferably has a plurality of WECO jacks including afirst monitor jack 104, anoutput jack 106, aninput jack 108, and asecond monitor jack 110. Thefirst monitor jack 104 and thesecond monitor jack 110 provide for the taking of samples of a signal from the telecommunications network and theoutput jack 106 andinput jack 108 are for receiving the signal from, and inputting a signal to, the telecommunications network, respectively. When patching or monitoring is required to telecommunication network equipment, at least oneDSX module 100 is slid into aslot 28 of the panel assembly where it aligns with an individual PCB, which is connected to the network equipment, resulting in theDSX module 100 intruding or intercepting a telecommunication signal running through the network equipment. - While BNC jacks are referred to herein, the reference is by way of example only and any one of a number of currently known or to be developed jacks may be utilized within the contemplation of this invention, with no one in particular being necessary to practice this invention.
- It will also be appreciated by those of ordinary skill in the art that while four jacks are shown in the preferred embodiment, this invention is not limited to four jacks, but instead may include others of a plurality, such as six jacks, for example. In a six-jack configuration, for example, additional jacks for cross-connect in and cross-connect out may be added to the module.
- As is best shown in
FIGS. 1 and 4 , a plurality ofmodule guide walls 20 simultaneously direct theDSX module 100 upon insertion into the assembly and provide structural support for theassembly 10. Thepresent DSX module 100 is fully enclosed in theplastic casing 102, which also provides the surface to guide theDSX module 100 into one of theslots 28 in theassembly 10. To aid in module insertion, one ormore projections 24, such as those shown inFIG. 3 , or one or morehorizontal strips 22 are disposed on each of theguide walls 20, as shown inFIG. 1 , for aiding in guiding each of the plurality ofmodules 100 into theslots 28 of thetelecommunication assembly 10. Moreover, theprojections 24 and strips 22 are preferably pressed or stamped into theguide walls 20 and extended outward from the guide walls 20 a distance equal to the width of the hinges for the doors, as will be discussed below, such that themodules 100 have no interference when slid into aslot 28. Theguide walls 20 are preferably constructed of metal, such as stainless steel or tin. - Each of the
modules 100 includes agrip 114 mounted thereon for gripping by an operator, as shown inFIGS. 1, 4 , and 5. Spaced apart from thegrip 114 is aflange 118, which is also gripped by the operator, and an integrally formedtab 120. As shown inFIG. 4 , aretention aperture 112 is disposed in the assembly for receiving thetab 120 upon insertion of each of the plurality ofmodules 100 into one of the plurality ofslots 28. To remove themodule 100 from thetelecommunication assembly 10, thegrip 114 andflange 118 are squeezed toward one another thereby slidingly removing thetab 120 from the aperture disposed in thetelecommunication assembly 10 as themodule 100 is biased. Thegrip 114,flange 118, andtab 120 are constructed of a hard plastic, which is also preferably a thermoplastic similar to thecasing 102 of themodule 100. A spring arrangement is created on themodule 100 because theflange 118 and integrally formedtab 120 extend outward from thecasing 102 of themodule 100. - Each
slot 28 in theassembly 10 has a selfclosing swing door 36, as shown inFIG. 1 , which covers the front of the slot when aDSX module 100 is not installed in a particular slot, thereby preventing environmental elements such as dirt from entering therein. Thedoors 36 have spring hinges 90, as shown inFIG. 12 , for returning thedoors 36 back to their normally closed positions. When aDSX module 100 is inserted into aslot 28, the associateddoor 36 is held open by abutting themodule 100 thereby allowing an operator to visually see that amodule 100 is inserted into aparticular slot 28. One side of eachdoor 36 has an integrally formedrod 36 a, which tapers at the top and bottom. Each of such tapered portions is inserted through one of the spring hinges 90. Anextension 92 protrudes from the top and bottom of eachspring hinge 90. The top extension is coupled to the assembly, while the bottom extension is biased against theswiveable door 36. A spring force tension is created between thespring hinge 90 and thedoors 36 upon insertion of amodule 100 therein. This tension is relieved when themodule 100 is removed from theslot 28. - The
telecommunication assembly 10 couples to a telecommunication network and includes a plurality of distinctbackplane circuit boards 80 secured therein for each coupling to one of the plurality ofmodules 100. As is best seen inFIG. 6 , each of the plurality of distinctbackplane circuit boards 80 include a boundingedge 94 and aback side 96 partially encompassed by the boundingedge 94. A plurality of first connectors, which are preferably BNC jacks 84 but could be any telecommunication adapter designed to attach to a circuit board such as acard edge connector 82, WECO jack, or wire-wrap, are coupled to theback side 96 of the circuit board for receiving a telecommunication signal from the telecommunication network. The BNC jacks 84 may be such as those manufactured by the Amphenol Company, having a URL at http://www.Amphenol.com or those manufactured by the Molex Company, or equivalent. - A front side 98 is integrally formed with the
back side 96, and a second connector is mounted on the front side 98 and spaced apart from the at least onejack 84 for coupling to one of the plurality ofmodules 100. The second connector, which is preferably a normally closed,card edge connector 82 but could also be a plurality of BNC jacks 84, WECO jacks, or wire-wraps, is mounted on the PCB, as shown inFIGS. 4, 6 , 8, and 9. Thecard edge connector 82 receives acard edge 88 therein having electrical contacts on only one side of theedge 88. During normal operation the telecommunication signal loops through the normally closed,card edge connector 82 with negligible loss such that it can be monitored from either thefirst monitor jack 104 or thesecond monitor jack 110. - Referring with particularity to
FIGS. 8, 9 , and 10, the present invention further provides a “make before break” feature wherein the connection or coupling of thecard edge 88 of themodule 100 to thecard edge connector 82 is physically made before the operation of the normally closed circuit of thebackplane circuit board 80 is broken. As stated above, the circuit of each of thebackplane circuit boards 80 such that the X-OUT port has continuity with the OUT port and the X-IN port has continuity with the IN port, as shown inFIGS. 10 and 13 . Once thecard edge 88 is physically and electrically coupled to thecard edge connector 82 which whereby will allow themodule 100 and thenetwork equipment 140 to be coupled to the particular backplane circuit board to be monitored via themodule 100. - The signal from the IN port of
network equipment 140 is terminated to the IN port of the backplane circuit board, the signal is transferred to theedge connector 82 via thePCB 80. Theedge connector 82 provides shorting terminals that pass the signal through theedge connector 82 when there is no module inserted within. The signal is transferred back to the X-IN port of the backplane circuit board viaPCB 80 and finally to the OUT port of the first piece ofequipment 130. In addition, the signal from the OUT port ofnetwork equipment 140 is terminated to the OUT port of the backplane circuit board, the signal is transferred to theedge connector 82 via thePCB 80. Theedge connector 82 provides shorting terminals that pass the signal through theedge connector 82 when there is no module inserted within. The signal is transferred back to the X-OUT port of the backplane circuit board viaPCB 80 and finally to the IN port of the first piece ofequipment 130. - It is important that the physical connection of the
card edge 88 andcard edge connector 82 be fully completed before the normally closed circuit is broken so that an electrical signal existing thereon is not inadvertently shorted to ground or that the circuit is prevented from being open circuited. To accomplish the physical seating of thecard edge 88 into thecard edge connector 82 before the circuit of thecircuit board 80 is broken, agap 150 exists from the end of thecard edge 88 to where the one sided electrical contacts 70 are mounted and also from the end of thecard edge connector 82 to where its internal contacts are located, as shown inFIG. 6 . - A significant feature of the present invention is that the
telecommunication assembly 10 is operable with one or more of the plurality of distinctbackplane circuit boards 80 removed from theassembly 10. What's more, theback side 96 of each of the plurality of distinctbackplane circuit boards 80 of the present invention is stepped, staggering at least one of the plurality of first connectors for easy access by an operator. This is best shown inFIGS. 6 and 8 . - The plurality of BNC jacks 84 coupled to the
back side 96 of the distinctbackplane circuit boards 80 are mounted to the boundingedge 94 of the each of the plurality of distinctbackplane circuit boards 80. This mounting is preferably accomplished by twolegs 30 extending from eachBNC jack 84 and “pinching” the PCB by friction fit or being soldered to grounding pads on the backplane circuit board. A center conductor 38 press fits against a landing pad on one side of the circuit board. Shown inFIG. 10 is the circuit diagram for thebackplane circuit boards 80, coupling thecard edge connector 82 to the BNC jacks 84. - As is best seen in
FIGS. 1 and 4 , each of the plurality of distinctbackplane circuit boards 80 are secured in parallel with one of the plurality ofmodules 100 when inserted into one of theslots 28. This allows for a maximum number of distinctbackplane circuit boards 80 and associatedmodules 100 to be installed in a fixed space in the assembly. In addition, the edge mounted BNC jacks 84, instead of being board mounted, allow for thebackplane circuit boards 80 to be no thicker than the diameter of the BNC jacks 84 further allowing for a maximum number of distinctbackplane circuit boards 80 and associatedmodules 100 to be installed in a fixed space in theassembly 10. - At least one
notch 86 is formed in the boundingedge 94 of each of the plurality of distinctbackplane circuit boards 80, as shown inFIGS. 1, 4 , and 6. A plurality oftines 42, as shown inFIGS. 1, 4 , 7, and 11, are coupled to thetelecommunication assembly 10 with at least one of the plurality oftines 42 partially extending into the at least onenotch 86 at such an angle that thetine 42 asserts little resistance as thebackplane circuit board 80 is inserted into theassembly 10 and great resistance when thebackplane circuit board 80 is removed from theassembly 10. In operation of the present invention, a screwdriver or extended implement is used to force thetine 42 from thenotch 86 when thebackplane circuit board 80 is removed from theassembly 10. - As shown in
FIG. 7 , aleaf spring member 40 of the present invention has a plurality ofapertures 44 for attaching theleaf spring member 40 to theassembly 10. The plurality oftines 42 are integrally formed on theleaf spring member 40. In the preferred embodiment, oneleaf spring member 40 is attached to the lower half of theassembly 10 and another to the upper half of theassembly 10 such that atine 42 extends into an upper andlower notch 86 in each of thebackplane circuit boards 80. - A pair of
guide ridges 34 are attached to thetelecommunication assembly 10 for guiding the plurality of distinctbackplane circuit boards 80 when installed in, and removed from, thetelecommunication assembly 10. Theguide ridges 34 are preferably half-circle in shape, constructed of plastic or hard metal, and preferably there are two sets ofguide ridges 34 for eachbackplane circuit board 80 with each set disposed on either side of thecircuit board 80. As is best shown inFIG. 11 , a plurality of metal or hard plastic stops 32 are disposed on thetelecommunication assembly 10 against which the boundingedge 94 of each of the plurality of distinctbackplane circuit boards 80 abuts. The plurality ofstops 32 work most effectively when each of the distinctbackplane circuit boards 80 are inserted into the front of the assembly, slid between theguide ridges 34, and subsequently abut the givenstop 32. Theguide ridges 34 and stop 32 are also preferably integrally formed with theassembly 10. - As mentioned above, the
distinct PCBs 80 are slidably received in parallel to each other in thetelecommunication assembly 10 and centered to be in a parallel plane with an associatedDSX module 100. Preferably, a plurality of BNC jacks 84 are mounted on eachPCB 80 and protrude outward in stair-step fashion thereby allowing easy coupling to the network equipment. ThePCBs 80 are individually removable. This is desirable to the operator because they do not need to fully load thetelecommunication assembly 10 with PCBs until telecommunication network growth requires such. - Referring now with particularity to
FIGS. 4, 6 , and 13, theindividual PCBs 80 are shown that individually and in the aggregate form the backplane of thetelecommunication assembly 10. As stated previously, only onePCB 80 is needed for thetelecommunication assembly 10 to be operational. Moreover, the present invention also provides a module-less feature such that thetelecommunication assembly 10 is enabled to cross-connect two separate devices of networking equipment to each other without any of themodules 100 being installed in theassembly 10. -
FIG. 13 shows two devices ofnetworking equipment backplane circuit board 80. It is understood that the two devices of networking equipment could be any devices capable of communicating with each other via electrical signals and that are commonly used in telephone copper networks. To perform the function of cross-connecting thenetworking equipment networking equipment 130 is coupled to the X-OUT port on thebackplane circuit board 80, which, in turn, is connected to the OUT port that is also contained on thebackplane circuit board 80. Finally, the OUT port of thecircuit board 80 is coupled to the Out port of the second piece ofnetworking equipment 140. - In addition, the In port of the second piece of
networking equipment 140 is coupled to the IN port of the backplane circuit board, which, in turn, is connected via thecircuit board 80 to the X-IN port and finally to the Out port of the first piece ofnetworking equipment 130. The circuit diagram coupling the ports on thePCB 80 is also shown inFIG. 10 . Such cross-connecting occurs without the need of amodule 100 being disposed in thetelecommunication assembly 10 or connected via thecard edge connector 82 to thePCB 80. This function yields added versatility and greatly reduces costs over prior telecommunication assemblies. - Although the invention has been described in detail above, it is expressly understood that it will be apparent to persons skilled in the relevant art that the invention may be modified without departing from the spirit of the invention. Various changes of form, design, or arrangement may be made to the invention without departing from the spirit and scope of the invention. Therefore, the above mentioned description is to be considered exemplary, rather than limiting, and the true scope of the invention is that defined in the following claims.
Claims (6)
1. A telecommunication assembly disposed to receive a plurality of modules therein, the telecommunication assembly for coupling to a telecommunication network and comprising:
a plurality of distinct backplanes secured in the telecommunications assembly each for coupling to one of the plurality of modules, each of the plurality of distinct backplanes including:
a back side,
a plurality of first connectors coupled to the back side for receiving a telecommunication signal from the telecommunication network,
a front side coupled to the back side, and
a second connector mounted on the front side and spaced apart from the at least one jack, the second connector for coupling to one of the plurality of modules, wherein the second connector is a normally closed connector such that a circuit is formed and operable between the plurality of first connectors without a module being connected to the second connector.
2. The telecommunication assembly of claim 1 wherein the plurality of distinct backplanes are releasably secured within the telecommunication assembly.
3. The telecommunication assembly of claim 1 and further wherein the telecommunication assembly is operable with one or more of the plurality of distinct backplanes removed from the assembly.
4. A telecommunication assembly disposed to receive a plurality of modules therein, the telecommunication assembly for coupling to a telecommunication network and comprising:
a plurality of distinct backplanes secured in the telecommunications assembly each for coupling to one of the plurality of modules, each of the plurality of distinct backplanes including:
a back side;
a plurality of first connectors coupled to the back side for receiving a telecommunication signal from the telecommunication network;
a front side coupled to the back side;
a second connector mounted on the front side and spaced apart from the at least one jack, the second connector for coupling to one of the plurality of modules, wherein the second connector is a normally closed connector such that a circuit is formed and operable between the plurality of first connectors without a module being connected to the second connector; and further wherein the second connector is disposed to make an electrical connection to the module before the circuit between the plurality of first connectors is broken.
5. The telecommunication assembly of claim 4 wherein the plurality of distinct backplanes are releasably secured within the telecommunication assembly.
6. The telecommunication assembly of claim 4 and further wherein the telecommunication assembly is operable with one or more of the plurality of distinct backplanes removed from the assembly.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/011,484 US20050233640A1 (en) | 1998-09-18 | 2004-12-13 | Module-less cross connect assembly |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10084598P | 1998-09-18 | 1998-09-18 | |
US09/282,344 US6587354B1 (en) | 1998-09-18 | 1999-03-31 | Telecommunication assembly |
US56274300A | 2000-05-02 | 2000-05-02 | |
US11/011,484 US20050233640A1 (en) | 1998-09-18 | 2004-12-13 | Module-less cross connect assembly |
Related Parent Applications (1)
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US56274300A Continuation | 1998-09-18 | 2000-05-02 |
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US09/282,344 Expired - Lifetime US6587354B1 (en) | 1998-09-18 | 1999-03-31 | Telecommunication assembly |
US11/011,484 Abandoned US20050233640A1 (en) | 1998-09-18 | 2004-12-13 | Module-less cross connect assembly |
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US09/282,344 Expired - Lifetime US6587354B1 (en) | 1998-09-18 | 1999-03-31 | Telecommunication assembly |
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EP (1) | EP0987905A3 (en) |
JP (1) | JP2000102045A (en) |
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- 1999-03-31 US US09/282,344 patent/US6587354B1/en not_active Expired - Lifetime
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- 1999-07-09 CA CA002277398A patent/CA2277398A1/en not_active Abandoned
- 1999-07-28 BR BR9903013-6A patent/BR9903013A/en not_active Application Discontinuation
- 1999-07-29 AR ARP990103770A patent/AR025261A1/en unknown
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-
2004
- 2004-12-13 US US11/011,484 patent/US20050233640A1/en not_active Abandoned
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Cited By (1)
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US9258024B2 (en) * | 2013-05-21 | 2016-02-09 | Huizhou Tcl Mobile Communication Co., Ltd | SIM card connector and mobile terminal |
Also Published As
Publication number | Publication date |
---|---|
AR025261A1 (en) | 2002-11-20 |
CA2277398A1 (en) | 2000-03-18 |
US6587354B1 (en) | 2003-07-01 |
AU3686099A (en) | 2000-03-23 |
EP0987905A2 (en) | 2000-03-22 |
JP2000102045A (en) | 2000-04-07 |
KR20000022684A (en) | 2000-04-25 |
BR9903013A (en) | 2000-08-15 |
EP0987905A3 (en) | 2000-07-05 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |