Module-less cross connect assembly
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.
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.”
Field of the InventionIn 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.
BACKGROUNDA 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.
SUMMARYA 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.
BRIEF DESCRIPTION OF THE DRAWINGS
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
Shown in
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. When patching or monitoring is required to telecommunication network equipment, 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.
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
Each of the modules 100 includes a grip 114 mounted thereon for gripping by an operator, as shown in
Each slot 28 in the assembly 10 has a self closing swing door 36, as shown in
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. As is best seen in
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
Referring with particularity to
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. In addition, 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.
It is important that the physical connection of the card edge 88 and card 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 the card edge 88 into the card edge connector 82 before the circuit of the circuit board 80 is broken, a gap 150 exists from the end of the card edge 88 to where the one sided electrical contacts 70 are mounted and also from the end of the card edge connector 82 to where its internal contacts are located, as shown in
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
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
As is best seen in
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
As shown in
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. As is best shown in
As mentioned above, 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. Preferably, 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.
Referring now with particularity to
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 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
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
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.
Type: Application
Filed: Dec 13, 2004
Publication Date: Oct 20, 2005
Inventor: Duane Kutsch (Seattle, WA)
Application Number: 11/011,484