WO2020185087A1

WO2020185087A1 - Distribution frame, in particular an optical distribution frame, and a method for using said distribution frame

Info

Publication number: WO2020185087A1
Application number: PCT/NL2020/050169
Authority: WO
Inventors: Guy-Noël Rodriguez; Wouter MULLING
Original assignee: B.V. Twentsche Kabelfabriek
Priority date: 2019-03-14
Filing date: 2020-03-13
Publication date: 2020-09-17
Also published as: EP3938826A1; NL2022743B1

Abstract

The invention relates to a distribution frame, in particular an optical distribution frame, for patching patch cords between an entry side and an exit side of the distribution frame, wherein the distribution frame comprises a first panel section, a switch section and a first guide section between the first panel section and the switch section, wherein the first guide section comprises guide elements for guiding all patch cords originating from the patch panels along respective guide paths, wherein the guide paths have different lengths, wherein the switch section is arranged for switching the plurality of patch cords received from the plurality of guide elements of the first guide section to any destination at the exit side of the distribution frame. The invention further relates to an assembly of the distribution frame and the patch panels, and to a method for patching patch cords between an entry side and an exit side of the distribution frame.

Description

Distribution frame, in particular an optical distribution frame, and a method for using said distribution frame

BACKGROUND

The invention relates to a distribution frame, in particular an optical distribution frame, and a method for using said distribution frame.

Modern fibre optic networks are growing increasingly more complex with more and more connections. Consequently, the known distribution frames that are used to patch said connections to local equipment with patch cables are increasing in size and complexity as well. To prevent entanglement, various solutions have been proposed that attempt to reduce slack in the patch cables.

EP 1 217 411 A2 discloses a main optic fibre distribution frame that receives fibre connectors from an outside network and guides patch cables through the frame to form bridges with fixed lengths, common to any position. In particular, said main optic fibre distribution frame has a first stack of coupling holders that receive fibre connections from the outside network, a second stack of coupling holders and a section with an array of cable supports distributed in the vertical direction between the two stacks to guide the patch cables from a coupling holder at a source level in the first stack to a coupling holder at a destination level in the second stack. Depending on the source level and the destination level of a specific bridge to be formed, one of the cable supports is chosen such that the bridge formed by the respective patch cable travels the same length as any other patch cable running from any other source level to any other destination level. The patch cables received at the second stack are subsequently guided to splicing trays for splicing to the equipment .

US 7,457,505 B2 discloses a patch cord management system aimed at minimizing the variety of patch cord lengths required and optimizing the routing of patch cords. The patch cord management system is provided with a plurality of patch panels, divided into a top stack and a bottom stack, with a slack control area in between. The slack control area holds a first plurality of slack spools for guiding patch cords along paths at the left side of the frame and a second plurality of slack spools for guiding patch cords along paths at the right side of the frame. The path of each patch cord along the slack spools is chosen based on the source and the destination.

SUMMARY OF THE INVENTION

A disadvantage of the distribution frame known from EP 1 217 411 A2 is that the section with the cable supports is responsible for both the absorption of any excess length in the patch cables between the source and the destination as well as switching said patch cables from the source to the destination. The same applies to the slack control area and the slack spools as disclosed in US 7, 457, 505 B2. Hence, for each bridge to be formed or for each path to be travelled, both the source and the destination have to be established to correctly determine the correct cable support or the correct slack spool for guiding. This is different for every bridge or path to be travelled and cannot be easily determined. Moreover, guiding each patch cable individually from a specific source to a specific destination while simultaneously absorbing or compensating for excess length or slack and crossing other patch cables running over the same cable support or slack spool from another source to another destination still results in a very complex web of cross connections. As a consequence, rerouting of the patch cables after their initial patching can be difficult, if not impossible, in particular with the ever increasing number of sources and destinations in modern fibre optic networks. Therefore, the capacity of the known solutions is limited .

It is an object of the present invention to provide a distribution frame and a method for using said distribution frame, wherein the complexity of the distribution frame can be reduced.

According to a first aspect, the invention provides a distribution frame, in particular an optical distribution frame, for patching patch cords between an entry side and an exit side of the distribution frame,

wherein the distribution frame at the entry side comprises a first panel section with a plurality of levels for receiving a plurality of patch panels, wherein each patch panel is provided with a plurality of connectors for connecting a plurality of external cables terminating in said patch panel to a plurality of patch cords,

wherein the distribution frame further comprises a switch section and a first guide section between the first panel section and the switch section for guiding the patch cords from the first panel section to the switch section,

wherein the first guide section comprises a plurality of guide elements, wherein each guide element is arranged for guiding all patch cords of the plurality of patch cords originating from one of the levels of the first panel section along a respective guide path, wherein the plurality of guide paths have different lengths,

wherein the switch section is arranged for switching the plurality of patch cords received from the plurality of guide elements of the first guide section to any destination at the exit side of the distribution frame. For the purpose of this invention, the term 'switching' is understood to be the act of changing the routing of a patch cord from its patch panel at first panel section (the source) to any destination at the exit side of the distribution frame. By introducing a first guide section with guide paths of different lengths between the first panel section and the switch section, excess length of slack in the patch cords can be at least partially absorbed or compensated prior to the actual switching of said patch cords in the switch section. More in particular, by guiding all of the patch cords originating from a specific patch panel through the same guide element, the guide section does not perform any switching and can be dedicated for absorbing or compensating excess length or slack in the patch cords prior to the actual switching in the switch section. Consequently, length differences between the patch cords in the switch section can be reduced, thus allowing for a more structured and less complex switching of said patch cords.

The plurality of levels of the first panel section comprises a first outer level, a second outer level and a plurality of intermediate levels incrementally spaced apart between the first outer level and the second outer level in a first stacking direction, wherein each level of the plurality of levels is arranged for receiving a patch panel to form a first stack of patch panels, wherein the plurality of guide elements comprises a first outer guide element for guiding all patch cords of the plurality of patch cords originating from the patch panel at the first outer level of the first panel section along a first outer guide path, a second outer guide element for guiding all patch cords of the plurality of patch cords originating from the patch panel at the second outer level of the first panel section along a second outer guide path and a plurality of intermediate guide elements for guiding all patch cords of the plurality of patch cords originating from the respective patch panels at the intermediate levels of the first panel section along respective intermediate guide paths. As the levels in the first panel section are increasingly further away from the first guide section from the first outer level to the second outer level, the length travelled by the patch cords from the respective levels to the first guide section increases correspondingly. By receiving all patch cords from a patch panel at a certain level in the same guide element, all of said patch cords can be guided along a guide path with a length that can be specifically adapted to at least partially absorb or compensate for the length difference of the patch cords of the respective level up to the first guide section compared to the lengths of the other patch cords originating from different levels up to the first guide section.

The first outer guide path is the longest, the second outer guide path is the shortest and the intermediate guide paths have incrementally longer lengths from the second outer guide element towards the first outer guide element. In this manner, the patch cords originating from the patch panel at the first outer level can be made to travel the longest guide path to absorb or compensate for the length difference up to the first guide section compared to the patch cords that originate from the patch panel at one of the higher levels.

The terms ' first outer level' and 'second outer level' are to be interpreted as the outer levels of a group of levels, considered in the first stacking direction, that meets the requirements above. It does not exclude further levels that do not meet the requirements, i.e. levels with patch panels that are directly interconnected without passing through the switch section. Wherever the terms 'first outer' and 'second outer' are used in combination with other features of the device, it means that those features are in some way associated with the 'first outer level' and the 'second outer level', respectively.

In a preferred embodiment, the first outer level is closest to the first guide section and the second outer level is furthest away from the first guide section.

More preferably, the first outer level is a base level and the second outer level is a top level.

In a preferred embodiment the plurality of levels are spaced apart over a spacing increment, wherein the lengths of the guide paths incrementally increase with a length increment that is at least equal to the spacing increment between the respective levels. Hence, the length difference in the patch cords as a result of the relative positioning of their respective levels with respect to the first guide section can be absorbed or compensated completely or at least to a large extent.

In a further embodiment thereof the first guide section is located in the first stacking direction between the first panel section and the switch section. In other words, the first panel section, the first guide section and the switch section can be placed in line in the first stacking direction.

In a further embodiment thereof the first panel section is arranged for incrementally offsetting the patch panels of the first stack from the first outer level to the second outer level in a first offset direction transverse or perpendicular to the first stacking direction, wherein the plurality of guide elements of the first guide section are incrementally offset from the first outer guide element to the second outer guide element in the same first offset direction. By offsetting the patch panels and the guide elements, the patch cords originating from one of the patch panel at one of the levels can be kept separate from the patch cords originating from the patch panels at the other levels. Moreover, the offset allows for the distribution frame to be more compact .

Preferably, the first outer guide element, the intermediate guide elements and the second outer guide element of the first guide section are arranged for guiding the plurality of patch cords in a first outer guide plane, intermediate guide planes and a second outer guide plane, respectively, which are mutually parallel and incrementally offset in the first offset direction. The patch cords originating from different patch panels at different levels can thus be guided in separate planes, i.e. without switching them between planes in either the first panel section and the first guide section.

More preferably, the first offset direction is perpendicular to the first outer guide plane. Hence, the planes can be arranged one behind the other. The guiding of the patch cords originating from different patch panels at different levels can therefore take place at different depths in the first offset direction.

In a further embodiment the first panel section is arranged for incrementally offsetting the patch panels of the first stack in the first offset direction over an offset increment, wherein the plurality of guide elements of the first guide section are offset over the same or substantially the same offset increment in the same first offset direction. Hence, the relative position between the guide elements and the patch panels can remain the same.

In another embodiment the number of guide elements of the first guide section is equal to the number of levels in the first panel section. Hence, for each level, a dedicated guide element can be provided to guide all patch cords originating from said one level.

In another embodiment the first panel section for each level of the plurality of levels comprises a transfer element to transfer all of the patch cords of the plurality of patch cords originating from the respective level towards or up to the first guide section, wherein each guide element of the plurality of guide elements of the first guide section is aligned with or connected to one of the transfer elements of the first panel section. Each transfer element can reliable guide all of the patch cords originating from the respective level towards and/or into the corresponding guide element at the first guide section.

Preferably, each transfer element extends parallel to or in a direction with at least a component parallel to the first stacking direction before feeding the patch cords into the corresponding guide elements of the first guide section. The distribution frame can be more compact when the patch cords are initially directed from the patch panels into a direction with a component parallel to the first stacking direction towards the first guide section .

In another embodiment each guide element of the plurality of guide elements of the first guide section comprises a guide channel extending along at least a part of the respective guide path. The guide element can for example extend along strategic positions of the respective guide path, i.e. where the respective guide path changes direction, to ensure that the patch cords follow the respective guide path. The guide element does not necessarily have to be continuous along the entire guide path but may have cut-outs or interruptions, i.e. to save weight or to allow access to the patch cords.

Preferably, each guide channel extends along at least half the length of the respective guide path and preferably along at least three-quarters of the length of the respective guide path. In this way, the patch cords can be guided more reliably along the respective guide path.

More preferably, the guide channel is continuous along the length of the respective guide path. In this way, the risk of the patch cords unintentionally leaving the respective guide path can be significantly reduced.

In another embodiment each guide channel comprises a plurality of sub-channels, wherein each sub channel is arranged for guiding one or more of the plurality of patch cords of the respective patch panel along at least a part of the respective guide path. All patch cords originating from a patch panel at one level of the first panel section may be distributed over said sub channels, i.e. according to the connector from which the respective one or more patch cords originate. Hence, when properly guided through the sub-channels, the one or more patch cords can be easily tracked back to a particular source, i.e. one of the respective connectors.

Preferably, the plurality of sub-channels are provided at least at one or more positions where the respective guide path changes direction. Hence, the one or more patch cords in each sub-channel can be reliably guided through said changes in direction separately from one or more patch cords in the other sub-channels.

More preferably, each sub-channel extends along at least half the length of the respective guide path and preferably along at least three-quarters of the length of the respective guide path. Most preferably, the sub channels are continuous along the length of the respective guide path. In this way, the risk of the patch cords unintentionally leaving the respective sub-channel can be significantly reduced or even eliminated.

Preferably, the plurality of sub-channels extend mutually parallel, side-by-side in a common plane. Consequently, the one or more patch cords in each sub channel can be guided in a common plane. In such a common plane, it can be relatively easy to follow the routing of said one or more patch cords through the first guide section. Moreover, each sub-channel can be easily accessed.

More preferably, the orientation of the common plane is twisted at least once along the respective guide path. By twisting the common plane, i.e. prior to, shortly after or at a change in direction of the respective guide path, the orientation of the common plane can be optimized for the next part of the respective guide path. The common plane may for example be twisted such that in the next part of the respective guide path the patch cords can be more easily accessed or manipulated.

In another embodiment each guide elements of the first guide section is arranged for receiving the plurality of patch cords from the first panel section in a feeding direction and for discharging the plurality of patch cords to the switch section in the same feeding direction, wherein the respective guide path in each guide element extends partially transverse to the feeding direction. The transverse part of each guide path defines the amount of excess length or slack that is being absorbed or compensated in the respective guide path.

In another embodiment the first outer guide element of the first guide section is formed by a sequence of geometric shapes, wherein the intermediate guide elements of the first guide section have the same sequence of geometric shapes, wherein one or more of the geometric shapes have incrementally smaller proportions from the first outer guide element towards the second outer guide element of the first guide section. The guide elements may for example comprise a sequence of line segments and corners, wherein the line segments are incrementally smaller from the first outer guide element towards the second outer guide element. Alternative, the guide element may comprise a circular segment or a semicircle, wherein the radius of said circular segment or semicircle is incrementally smaller from the first outer guide element towards the second outer guide element.

Preferably, the guide elements are nested one inside the other from the first outer guide element towards the second outer guide element of the first guide section. Hence, the guide elements can be placed relatively close together and/or the first guide section can be relatively compact. Moreover, each guide element can remains accessible as it is not overlapped by the other guide elements .

In another embodiment the distribution frame at the exit side comprises a second panel section with a plurality of levels for receiving patch panels and a second guide section between the switch section and the second panel section for guiding the patch cords from the switch section to the second panel section. The patch cords can be patched to any destination, i.e. to external cables, at the exit side of the distribution frame by means of the second panel section. The patch cords can be continuous or uninterrupted from the patch panels in the first panel up to the patch panels in the second panel section. The second guide section can reliably guide the patch cords, after switching in the switch section, to the respective patch panel in the second panel section according to the destination chosen in the switch section.

Preferably, each level of the plurality of levels of the second panel section is arranged for receiving a patch panel to form a second stack of patch panels in a second stacking direction parallel or substantially parallel to the first stacking direction. The second panel section thus has substantially the same configuration with a second stack of patch panels that is parallel to the first stack of patch panels.

More preferably, the plurality of levels of the second panel section are at the same level as or correspond to the plurality of levels of the first panel section. Consequently, the levels of the first panel section and the second panel section can be more easily related to each other to simplify the patching, i.e. the first outer level of both panel sections can be at the same level.

In a further embodiment the second guide section comprises a plurality of guide elements having the same or substantially the same features as the plurality of guide elements of the first guide section. Accordingly, the guide elements of the second guide section can at least partially absorb or compensate excess length or slack in the patch cords as a result of the length differences of the patch cords in the second panel section. Hence, the second guide section can cooperate with the second panel section in substantially the same way as the first guide section cooperates with the first panel section.

In a further embodiment the second panel section is mirrored to the first panel section about a mid-plane between the entry side and the exit side. The first panel section and the second panel section can thus share the same features, yet mirrored in or about said mid-plane. Having a symmetrical configuration allows for a more structured and/or organized approach to the patch of the patch cords.

In a further embodiment the second guide section is mirrored to the first guide section about a mid-plane between the entry side and the exit side. The first guide section and the second guide section can thus share the same features, yet mirrored in or about said mid-plane. Having a symmetrical configuration allows for a more structured and/or organized approach to the guiding of the patch cords.

In another embodiment the switch section for each guide element of the plurality of guide elements of the first guide section comprises a switch entry position for receiving the patch cords from the respective guide element. Hence, the patch cords originating from a patch panel at a respective level of the first panel section can be guided through a dedicated guide element of the first guide section and can subsequently be entered into the switch section via a dedicated switch entry position. The patch cords can thus be tracked back relatively easily from the switch entry position to the corresponding patch panel in the first panel section.

Preferably, the switch entry positions are aligned with the guide paths defined by the respective guide elements of the first guide section. Hence, each switch entry position can reliably receive the patch cords from the respective guide element.

Preferably, the switch entry positions are all at the same or substantially the same distance from the first panel section. This is possible because the guide paths have different lengths to at least partially absorb or compensate the excess length or slack in the patch cords prior to the arrival of said patch cords at the switch section. Hence, there is no immediate need to offset the switch entry positions to compensate further for said excess length or slack. Preferably, all patch cords have travelled the same or substantially the same length from their respective patch panels up to the respective switch entry position.

In a further embodiment the switch section comprises a plurality of switch exit positions for receiving the plurality of patch cords from any one of the switch entry positions and for supplying said plurality of patch cords to any destination at the exit side, wherein the switch section is arranged for switching the plurality of patch cords between the plurality of switch entry positions and the plurality of switch exit positions. The switching can thus be performed exclusively between the switch entry positions and the switch exit positions.

Preferably, the switch entry positions and the switch exit positions lie in a switch plane that extends perpendicular or substantially perpendicular to the first stacking direction. The switching of the patch cords can thus be performed in a plane that is at a constant distance from the first panel section. In particular, the switch entry positions and the switch exit positions are at the same distance from the first panel section in the first stacking direction. Consequently, if all patch cords travel over the same or substantially the same length through the switch section, said patch cords can leave the switch section with their mutual length differences substantially unaffected compared to entry of said switch section at the switch entry positions.

Preferably, the switch section further comprises a plurality of redirection members located between the switch entry positions and the switch exit positions for forming a plurality of switch paths for switching the patch cords between any one of the switch entry positions and any one of the switch exit positions. The redirection members can help structure the switching process.

More preferably, the plurality of redirection members are strategically placed such that in a group of one switch path for each pair of one of the switch entry positions and one of the switch exit positions all switch paths in the group have the same length within a tolerance of less than twenty percent, and preferably less than ten percent. Consequently, the patch cords can leave the switch section with their mutual length differences substantially unaffected compared to entry of said switch section at the switch entry positions.

According to a second aspect, the invention provides an assembly of a distribution frame according to any one of the aforementioned embodiments and a plurality of patch panels distributed over the plurality of levels.

The assembly combines the aforementioned distribution frame with a plurality of the patch panels which may be supplied separately from said distribution frame and assembled on-site. The assembly of the distribution frame and the patch panels has the same technical advantages as any of the previously discussed embodiments .

According to a third, unclaimed aspect, the invention provides a patch panel for use in the assembly according to the second aspect of the invention, wherein the patch panel is provided with a plurality of connectors for connecting a plurality of external cables terminating in said patch panel to the plurality of patch cords in a patch direction, wherein the plurality of connectors are placed side-by-side in a row direction perpendicular to the patch direction to form at least one row, wherein the patch panel further comprises a feed member with a plurality of feed channels for receiving the plurality patch cords from the plurality of connectors parallel to the patch direction and for directing said plurality of patch cords into the row direction towards one side of the patch panel in said row direction, wherein at least some of the feed channels of the plurality of feed channels comprise a diversion part that initially directs the patch cords away from the one side .

As mentioned before, the patch panels may be provided separately and can be installed in the distribution frame on-site. The patch panels themselves have distinguishing features over the prior art that further contribute to the same general inventive concept of reducing excess length and slack in the patch cords. In particular, the diversion part already absorbs or compensates for length differences or slack occurring between the connectors and the one side of the patch panel.

In a preferred embodiment each feed channel comprises a leading end where the patch cords are first received into the feed channel from the plurality of connectors, wherein the leading ends of the plurality of feed channels are incrementally offset in the patch direction. The incremental offset can effectively increase the length of the path travelled by the respective patch cords from the connector into the respective feed channels.

In another embodiment the plurality of connectors are placed in two or more rows which are superimposed in a column direction perpendicular to the patch direction and the row direction, wherein the two or more rows are offset with respect to each other in the patch direction. By offsetting the rows in the patch direction, the rows closer to the feed member can be recessed in the patch direction so that the patch cords originating from the connectors in said recessed rows have to travel the a longer path to the respective feed channels compared to a situation in which said rows are not offset in the patch direction.

According to a fourth aspect, the invention provides a method for patching patch cords between an entry side and an exit side of a distribution frame, in particular an optical distribution frame, according to any one of the embodiment of first aspect of the invention, wherein the method comprises the steps of:

a) providing a plurality of patch panels at the plurality of levels of the first panel section; b) connecting a plurality of patch cords to the patch panels at the first panel section;

c) guiding all patch cords of the plurality of patch cords originating from one of the patch panel of the first panel section via a respective one of the plurality of guide elements of the first guide section to the switch section;

d) switching the plurality of patch cords received from the guide elements of the first guide section in the switch section to any destination at the exit side of the distribution frame.

The method relates to the practical implementation or use of the optical distribution frame according to the first aspect of the invention. Hence, the method has the same technical advantages which will not be repeated hereafter.

In a preferred embodiment step c) comprises the steps of :

cl) guiding all patch cords of the plurality of patch cords originating from the patch panel at the first outer level of the first panel section via the first outer guide element of the first guide section to the switch section;

c2) guiding all patch cords of the plurality of patch cords originating from the patch panels at the intermediate levels of the first panel section via the respective intermediate guide elements of the first guide section to the switch section; and

c3) guiding all patch cords of the plurality of patch cords originating from the patch panel at the second outer level of the first panel section via the second outer guide element of the first guide section to the switch section .

In a further embodiment the plurality of patch cords are continuous or uninterrupted from the patch panels of the first panel section up to the exit side of the distribution frame. In another embodiment the distribution frame at the exit side comprises a second panel section with a plurality of levels for receiving patch panels and a second guide section between the switch section and the second panel section, wherein the method further comprises the steps of :

e) providing a plurality of patch panels at the plurality of levels of the second panel section;

f) switching the plurality of patch cords received from the guide elements of the first guide section in the switch section to any patch panel at the second panel section; and

g) guiding the plurality of patch cords through the second guide section to the respective patch panels at the second panel section.

Preferably, the plurality of patch cords are continuous or uninterrupted from the patch panels of the first panel section up to the patch panels of the second panel section.

In another embodiment the plurality of patch cords all have the same or substantially the same length. Hence, a single standardized type of patch cable can be used in the entire distribution frame.

According to a fifth, unclaimed aspect, the invention provides a distribution frame, in particular an optical distribution frame, for patching patch cords between an entry side and an exit side of the distribution frame,

wherein the switch section is arranged for switching the plurality of patch cords received from the plurality of guide elements of the first guide section to any destination at the exit side of the distribution frame.

The various aspects and features described and shown in the specification can be applied, individually, wherever possible. These individual aspects, in particular the aspects and features described in the attached dependent claims, can be made subject of divisional patent applications .

BRIEF DESCRIPTION OF THE DRAWINGS

The invention will be elucidated on the basis of an exemplary embodiment shown in the attached schematic drawings, in which:

figure 1 shows a perspective view of a distribution frame with a first panel section, a second panel section, a first guide section, a second guide section and a switch section according to a first embodiment of the invention;

figure 2 shows a front view of the distribution frame according to figure 1;

figure 3 shows a side view of the distribution frame according to figure 1;

figure 4 shows a detail of the first panel section according to circle IV in figure 1;

figure 5 shows a top view of the first panel section according to figure 4;

figure 6 shows a detail of the first guide section according to circle VI in figure 1;

figure 7 shows a detail of an alternative first guide section;

figure 8 shows a detail of the first guide section according to circle VIII in figure 2;

figure 9 shows a detail of the first guide section according to circle IX in figure 1;

figures 10A and 10B show front views of the distribution frame according to figure 2 with different guide paths;

figure 11 shows an alternative distribution frame according to a second embodiment of the invention;

figure 12 shows a further alternative distribution frame according to a third embodiment of the invention;

figure 13 shows a further alternative distribution frame according to a fourth embodiment of the invention;

figure 14 shows a further alternative distribution frame according to a fifth embodiment of the invention;

figure 15 shows a further alternative distribution frame according to a sixth embodiment of the invention;

figure 16 shows a further alternative embodiment according to a seventh embodiment of the invention; and

figures 17A-17D show bottom views of the switch section during exemplary steps of a switching method.

DETAILED DESCRIPTION OF THE INVENTION Figures 1, 2 and 3 show an assembly of an optical distribution frame 1 and a plurality of patch panels 8 according to a first exemplary embodiment of the invention. The distribution frame 1 is used for patching patch cords 9. Only one patch cord 9 is separately from the distribution frame 1 in figure 1 by way of example. The length of said patch cord 9 is not representative of the actual length used in the distribution frame 1. The distribution frame 1 is configured in such a way that - in principle - a single standardized length of patch cord 9 can be used for making 'any-to-any' source to destination connections. The patch cords 9 are left out of most of the drawings to show the structural features of the distribution frame 1 more clearly. Figures 10A and 10B show two different exemplary routes, routings or paths that a single patch cord 9 can follow through the distribution frame 1. With the distribution frame 1 as shown, a maximum of five-hundred-and-four patch cords 9 can be connected according to the 'any-to-any' source to destination principle. It will be clear to one skilled in the art that the capacity of the distribution frame 1 according to the present invention can be easily increased to hand even more patch cords 9, i.e. to more than one-thousand patch cords 9 or more than several thousands of patch cords 9.

The distribution frame 1 is arranged for patching the patch cords 9 between an entry side SI and an exit side S2 of the distribution frame 1. The entry side SI of the distribution frame 1 may be connected to external cables of a telecommunication network (not shown) , while the exit side S2 may be connected to external cables that lead to local equipment (not shown) . In this exemplary embodiment, the distribution frame is an optical distribution frame for use in optical fiber networks. However, different applications of the distribution frame, i.e. in a copper- based telecommunication network or in a wired network with yet unknown materials to facilitate communication, are also within the scope of this invention.

As best seen in figures 1 and 2, the distribution frame 1 according to the first embodiment of the invention comprises a first panel section A1 and a first guide section B1 at the entry side SI and a second panel section A2 and a second guide section B2 at the exit side S2. The panel sections Al, A2 are arranged for receiving a plurality of patch panels 8. In this example, the panel sections Al, A2 are arranged side-by-side in a lateral direction Y of the distribution frame 1. The patch panels 8 of the first panel section Al and the second panel section A2 are arranged for patching or connecting the patch cords 8 of the distribution frame 1 to external cables at the entry side SI and the exit side S2, respectively. The distribution frame 1 further comprises a switch section C extending from the entry side SI to the exit side S2. The switch section C is arranged for switching the plurality of patch cords 9 received from the first panel section Al to any destination at the exit side S2 of the distribution frame 1. In this example, the patch cords 9 travel from the first panel section Al, through the first guide section Bl, into the switch section C, through the second guide section B2 and terminate in the second panel section A2.

Alternatively, one or more of the patch cords 9 can be patched to external cables or local equipment directly from the switch section S. When all patch cords 9 are directly patched from the switch section S to external cables or local equipment, the distribution frame 1 only requires the first panel section Al, the first guide section Bl and the switch section C.

The distribution frame 1 may comprise a cabinet or a frame 2 for supporting the different components of the distribution frame 1 relative to the fixed world, i.e. the ground. Typically, a cabinet (not shown) is provided to shield the distribution frame 1 from ambient conditions. In this exemplary embodiment, the cabinet or frame 2 is arranged for supporting the patch panels 8 in the first panel section Al at a plurality of levels L1-L7. Similarly, the cabinet or frame 2 supports the patch panels 8 in the second panel section A2 at a plurality of levels L8-L14. In this example, only some of the patch panels 8 are supported on and/or mounted to the cabinet or the frame 2 and the remaining patch panels 8 are interconnected to form a largely self-supporting stack of patch panels 8. Alternatively, each patch panel 8 may be individually supported on and/or mounted to the cabinet or the frame 2, i.e. by individual providing individual slots, racks or shelves for each patch panel 8 (not shown) .

The plurality of levels L1-L7 of the first panel section A1 comprises a base level or first outer level Li, a top level or second outer level L7 and a plurality of intermediate levels L2-L6 incrementally spaced apart between the first outer level Li and the top level L7 in a first stacking direction D1. In this exemplary embodiment, the first outer level LI is closest to the first guide section B1 considered in the first stacking direction D1 and the second outer level L7 is furthest away from the first guide section B1 considered in the first stacking direction Dl. The plurality of levels L1-L7 are preferably spaced apart over a spacing increment II, more preferably a constant spacing increment II. Each level of the plurality of levels L1-L7 is arranged for receiving a patch panel 8 to form a first stack of patch panels 8.

As best seen in figure 3, the first panel section A1 is arranged for incrementally offsetting the patch panels 8 of the first stack from the first outer level LI to the second outer level L7 in a first offset direction XI transverse or perpendicular to the first stacking direction Dl . The patch panels 8 are offset in the first offset direction XI over an offset increment 12, preferably a constant offset increment 12. The patch panels 8 can thus be placed in a partial overlap or overhang with respect to the other patch panels 8 of the first stack in the first panel section A1. In this way, it can be prevented that all patch panels 8 feed out the patch cords 9 in the same plane. Instead, the each patch panel 8 has its feed-out in its own guide plane P1-P7, one behind the other.

Similarly, the plurality of levels L8-L14 of the second panel section A2 comprises a base level or a first outer level L8, a top level or a second outer level L14 and a plurality of intermediate levels L9-L13. Each level of the plurality of levels L8-L14 of the second panel section A2 is arranged for receiving a patch panel 8 to form a second stack of patch panels 8 in a second stacking direction D2. The second stacking direction D2 is preferably parallel or substantially parallel to the first stacking direction D1.

Moreover, as best seen in figure 2, the plurality of levels L8-L14 of the second panel section A2 are at the same or substantially the same level as or correspond to the plurality of levels L1-L7 of the first panel section A1. In this particular example, the second panel section A2 is mirrored to the first panel section A1 in the lateral direction Y and/or about a mid-plane M between the entry side SI and the exit side S2 of the distribution frame 1.

Figure 4 shows one of the patch panels 8 in more detail. Each patch panel 8 is provided with a plurality of connectors 80 for connecting a plurality of external cables (not shown) terminating in said patch panel 8 to a plurality of patch cords 9. The external cables terminate into connectors 80 at the back of the patch panel 8 and the patch cords 9 connect to the connectors 80 from the front of the patch panel 8 in a patch direction U. In this exemplary embodiment, each connector 80 has two ports and/or allows for connections between two patch cords 9 and two external cables. In this example, the connectors 80 are placed side-by-side in a row direction W perpendicular to the patch direction U to form a first row 81. The row 81 as shown comprises twelve connectors 80 to provide a total of twenty-four connections. Optionally, the patch panel 80 comprises one or more additional rows 82, 83 superimposed in a column direction Z perpendicular to the perpendicular to the patch direction U and the row direction W. Each row again holds twelve connectors 80. In total, the three rows 81, 82, 83 in the patch panel 80 as shown in figure 4 provide a total amount of seventy-two connections.

As shown in figures 4 and 5 the patch panel 8 further comprises a feed member 84 with a plurality of feed channels J1-J12 for receiving the plurality patch cords 9 from the plurality of connectors 80 parallel to the patch direction U and for directing said plurality of patch cords 9 into the row direction W towards one side 85 of the patch panel 8 in said row direction W. In this example, all patch cords 9 originating from the connectors 80 in a single column in the column direction Z are directed into the same feed channel J1-J12. Consequently, each feed channel J1-J12 may guide six patch cords 9.

At least some of the feed channels J1-J12 of the plurality of feed channels J1-J12 comprise a diversion part that initially directs the patch cords 9 away from the one side 85. The diversion part already absorbs or compensates for length differences or slack occurring between the connectors 80 and the one side 85 of the patch panel 8.

As best seen in figure 5, each feed channel Jl- J12 comprises a leading end 86 where the patch cords 9 are first received into the feed channel J1-J12 from the plurality of connectors 80. Said leading ends 86 of the plurality of feed channels J1-J12 can be optionally incrementally offset in the patch direction U. The incremental offset can effectively increase the length of the path travelled by the respective patch cords 9 from the connector 80 into the respective feed channels J1-J12.

Returning to figures 1, 2 and 3, it is shown that the first panel section A1 for each level L1-L7 comprises a transfer element 71-77 to transfer all of the patch cords 9 of the plurality of patch cords 9 originating from the respective level L1-L7 towards or up to the first guide section Bl. The transfer elements 71-77 may extend continuously all the way up to the first guide section Bl . Alternatively, the transfer elements 71-77 may extend only partially along the length of the patch cords 9 between the respective levels L1-L7 and the first guide section Bl, i.e. to save weight or to allow access to said patch cords 9. As shown in detail in figure 4, the transfer elements 71-77 may be formed as a duct or channel H, optionally with one or more sub-channels H1-H12. Said sub-channels H1-H12 may be aligned with, connected to or continuous with the feed channels J1-J12 of the feed member 84 of the respective patch panel 8. The transfer elements 71-77 extend parallel to or in a direction with at least a component parallel to the first stacking direction D1.

As best seen in figure 1, the first guide section B1 comprises a plurality of guide elements E1-E7. Each guide element E1-E7 is arranged for guiding all patch cords 9 of the plurality of patch cords 9 originating from one of the levels L1-L7 of the first panel section A1 along a respective guide path G1-G7. Said guide paths G1-G7 have different lengths to at least partially compensate or absorb length differences or slack in the patch cords 9 as a result of the different distances of the plurality of levels L1-L7 up to the first guide section B1.

In particular, the plurality of guide elements E1-E7 comprises a base guide element or a first outer guide element El for guiding all patch cords 9 originating from the patch panel 8 at the first outer level LI of the first panel section A1 along a base guide path or a first outer guide path G1. The plurality of guide elements E1-E7 further comprises a top guide element or a second outer guide element E7 for guiding all patch cords 9 originating from the patch panel 8 at the second outer level L7 of the first panel section A1 along a top guide path or a second outer guide path G7. The plurality of guide elements E1-E7 finally comprises a plurality of intermediate guide elements E2-E6 for guiding all patch cords 9 originating from the respective patch panels 8 at the intermediate levels L2-L6 of the first panel section A1 along respective intermediate guide paths G2-G6. The number of guide elements E1-E7 of the first guide section B1 is preferably equal to the number of levels L1-L7 in the first panel section A1. In other words, each one of the guide elements E1-E7 is arranged for receiving all patch cords 9 originating from a respective one of the patch panels 8 at a respective level L1-L7 of the first panel section A1.

Preferably, each guide element E1-E7 is aligned with, connected to or integral with one of the transfer elements 71-77 of the first panel section A1 to receive the patch cords 9 from the respective transfer element 71-77.

Note that the length travelled by the patch cords 9 from the respective level L1-L7 of the first panel section A1 up to the first guide section Bl, which in this example is the same or substantially the same as the length of the transfer elements 71-77 is incrementally longer for the levels L2-L7 of the first panel section A1 which are further away from the first outer level LI. This length difference would in conventional distribution frames would normally be a cause of slack or excess length. However, the guide paths G1-G7 in the distribution frame 1 of the present invention have been given different lengths to compensate for the slack or the excess length. In particular, the first outer guide path G1 is the longest, the second outer guide path G7 is the shortest and the intermediate guide paths G2-G6 have incrementally longer lengths from the second outer guide element E7 towards the first outer guide element El. Preferably, the lengths of the guide paths G1-G7 incrementally increase with a length increment that is at least equal to the spacing increment II between the respective levels L1-L2.

As shown in figure 3, the plurality of guide elements E1-E7 of the first guide section Bl are incrementally offset from the first outer guide element El to the second outer guide element E7 in the same first offset direction XI as the patch panels 8 at the respective levels L1-L7. Hence, the guide elements E1-E7 can receive the patch cords 9 from the patch panels 8 in the same guide planes P1-P7 as defined in the first panel section A1. More in particular, the first outer guide element El, the intermediate guide elements E2-E6 and the second outer guide element E7 of the first guide section B1 are arranged for guiding the plurality of patch cords 8 in a base guide plane or a first outer guide plane PI intermediate guide planes P2-P6 and a top guide plane or a second outer guide plane P7, respectively. The guide planes P1-P7 are preferably mutually parallel and incrementally offset in the first offset direction XI. In this particular example, the first offset direction XI is perpendicular to the first outer guide plane PI. The plurality of guide elements E1-E7 of the first guide section B1 are preferably offset over the same or substantially the same offset increment 12 in the same first offset direction XI as the patch panels 8 of the first panel section A1.

As best seen in figures 1 and 2, each guide elements E1-E7 is arranged for receiving the plurality of patch cords 9 from the first panel section A1 in a feeding direction F and for discharging the plurality of patch cords 9 to the switch section C in the same feeding direction F. Preferably, the infeed and the outfeed of each guide element E1-E7 is aligned. In other words, the patch cords 9 exit the first guide section B1 in the same or substantially the same feed direction F in which they entered the first guide section B1. In between, the respective guide path G1-G6 extends partially transverse or perpendicular to the feeding direction F. It is the transverse part of the respective guide path G1-G6 and the length thereof that defines or determines the amount of slack compensation in the respective guide path G1-G6.

The first outer guide element El of the first guide section B1 is formed by a sequence of geometric shapes, i.e. several horizontal and vertical linear segments and several corner segments interconnecting the linear segments. The overall shape of the first guide section B1 resembles the three sides of a rectangle with rounded corners. The intermediate guide elements E2-E6 of the first guide section B1 have the same sequence of geometric shapes. However, one or more of the geometric shapes of the intermediate guide elements E2-E6 have incrementally smaller proportions from the first outer guide element El towards the second outer guide element E7 of the first guide section B1. This allows for the guide elements E2-E6 to be nested one inside the other from the first outer guide element El towards the second outer guide element E7 of the first guide section Bl. In other words, in the front view of figure 2, it can be seen that each intermediate guide element E2-E6 and the second outer guide element E7 neatly fit inside the inner contour of another one of the guide elements E1-E6. Hence, overlap between the guide elements E1-E7 can be prevented and the overall distribution frame 1 can be more compact.

The second guide section B2 comprises a plurality of guide elements E8-E14 having the same or substantially the same features as the plurality of guide elements E1-E7 of the first guide section Bl, respectively. Preferably, the second guide section B2 is mirrored to the first guide section Bl about a mid-plane M between the entry side SI and the exit side S2. Accordingly, the guide elements E8- E14 of the second guide section B2 can at least partially absorb or compensate excess length or slack in the patch cords 9 as a result of the length differences of the patch cords 9 in the second panel section B2 and cooperate with the second panel section A2 in substantially the same way as the first guide section Bl cooperates with the first panel section A1.

Figure 11 shows an alternative distribution frame 101 according to a third embodiment of the invention, which differs from the aforementioned distribution frame 1 in that the guide elements E101-E114 of the first guide section B101 and the second guide section B102 have a different geometric shape. In particular, at least the first outer guide element E101, E108 and the intermediate guide elements E102-E106, E109-E113 have an at least partially circular shape, preferably a semicircular shape, thereby defining an at least partially circular guide path G101-G107. It will be apparent to one skilled in the art that various geometric shapes and sequences of said geometric shapes are possible to obtain the same or a similar slack compensation. The third embodiment of the invention further shows that the second outer guide elements E107, E114 do not necessarily have to follow the same geometric sequence. Instead, it may be sufficient in terms of slack absorption to continue the second outer guide elements E107, E114 along a straight line. These principles may also be applied to the previously discussed embodiments of the present invention.

In both embodiment, the guide elements E1-E7, E101, E107 of the first guide section Bl, B101 face towards and/or are fitted as close as possible to the guide elements E8-E14 of the second guide section B2, B102 with respect to the mid-plane M. Hence, the distribution frame 1, 101 can be very compact, i.e. for use in a street cabinet .

As best seen in figures 1 and 2, each guide element E1-E7 of the first guide section Bl comprises a guide channel H extending along at least a part of the respective guide path G1-G7. In this exemplary embodiment, the guide channel H is continuous along the length of the respective guide path G1-G6. Alternatively, the guide channel H may comprise cut-outs or be at least partially interrupted or discontinuous along the respective guide path G1-G6, i.e. to save weight or to allow for access to or manipulation of the patch cords 9 inside said channel H. Preferably, each guide channel H extends along at least half the length of the respective guide path G1-G6 and preferably along at least three-quarters of the length of the respective guide path G1-G6.

As best seen in figure 6, each guide channel H may comprises a main guide surface 30 and at least one strategically located side-wall or flange 31, 32 to bound, deflect, guide and/or retain the patch cords 9 on said main guide surface 30. The at least one side-wall or flange 31, 32 may for example be provided at a side of the main guide surface 30 where the patch cords 9 are likely to fall out of the guide channel H under the influence of gravity. The at least one side-wall or flange 31 may further be provided at locations where the patch cords 9 need to change direction, i.e. on the inside and/or the outside of a corner in the guide channel H. In this exemplary embodiment, each guide channel H, at least at some point along the respective guide path G1-G6 is provided with the main guide surface 30, a first side-wall or flange 31 and a second side wall or flange 32 opposite to the first side- wall or flange 31 to form a substantially U-shaped cross section of the guide channel H. Preferably, each guide channel H is open in at least one direction transverse or perpendicular to the respective guide path G1-G6 to allow access to or manipulation of the patch cords 9 inside said guide channel H. In this exemplary embodiment, the guide channels H of the plurality of guide elements E1-E7 are all open in the same direction, i.e. to the front of the distribution frame 1, to allow easy access for a technician .

As further shown in figure 6, the guide channel H may optionally comprise a plurality of sub-channels H1-H12. Each sub-channel H1-H12 is arranged for guiding one or more of the plurality of patch cords 9 of the respective patch panel 8 along at least a part of the respective guide path G1-G6. In this exemplary embodiment, all patch cords 9 originating from the connectors 80 in a single column in the column direction Z in figure 4 are directed into the same sub-channel H1-H12. Consequently, in this example, each sub-channel H1-H12 guides six patch cords 9. As best seen in figure 6, the plurality of sub-channels H1-H12 extend mutually parallel, side-by-side in a common plane Q. The orientation of the common plane Q can be twisted along the respective guide path G1-G6, for example to place the sub-channels H1-H12 in a condition that is more favorable to easy access by a technician or to redirect the patch cords 9 in an orientation that contributes to the slack compensation .

Figures 6 and 7 show two different examples of said twisting. In figure 6, the common plane Q is twisted about the inner sub-channel HI, thereby causing the outer sub-channel H12 to travel a longer distance through the corner. Such a twist may conveniently contribute to the slack compensation, for example when there is a length difference in the patch cords 9 originating from the different connectors 80 at the respective patch panel 8. In figure 7, the common plane Q is twisted after the corner and about the central sub-channels H6-H7 to minimize the length differences of the sub-channels H1-H12 along the twist .

Preferably, the plurality of sub-channels H1-H12 are provided at least at one or more positions where the respective guide path G1-G6 changes direction, i.e. in the corners of the guide paths G1-G6, as for example shown in figures 6, 7 and 8. In the drawings, the sub-channels Hl- H12 are only shown in the corners for simplicity. However, it will be clear that the sub-channels H1-H12 may also extend along a longer length of the respective guide path G1-G7, i.e. along at least three-quarters thereof. The sub channels H1-H12 may also be continuous along the entire guide path G1-G7. In a fully guided scenario, the sub channels H1-H12 may extend continuously from the respective source patch panel 8 in the first panel section A1 up to the respective destination patch panel 8 at the second panel section A2.

As best seen in figure 1, the switch section C for each guide element E1-E7 of the first guide section B1 comprises a switch entry position C1-C7 for receiving the patch cords 9 from the respective guide element E1-E7. Note that between the patch panels 8 at the respective levels L1-L7 of the first panel section A1 and the switch entry positions C1-C7, all patch cords 9 originating from one of the patch panels 8 are guided in the same guide element El- E7 and/or along the same guide path G1-G7 without being switched. Hence, the purpose of the first guide section B1 is merely to absorb the slack or excess length in the patch cords 9 prior to the arrival of said patch cords 9 at the switch section C. The switching occurs exclusively at the switch section C.

As shown in figure 3, the switch entry positions C1-C7 are aligned with the guide paths G1-G7 defined by the respective guide elements E1-E7 of the first guide section B1. More in particular, the switch entry positions C1-C7 are all at the same or substantially the same distance from the first panel section A1 and/or the first outer level LI.

As shown in figure 1, the switch section C further comprises a plurality of switch exit positions C8- C14 for receiving the plurality of patch cords 9 from any one of the switch entry positions C1-C7. The switch section C is arranged for switching the plurality of patch cords 9 between the plurality of switch entry positions C1-C7 and the plurality of switch exit positions C8-C14. For the purpose of this invention, the term ‘'switching' is understood to be the act of changing the routing of a patch cord 9 from its patch panel 8 at first panel section A1 (the source) to any destination at the exit side E2 of the distribution frame 1. In this example, the patch cords 9 can subsequently be supplied from the switch exit positions C8-C14 to any destination at the exit side S2, in particular to a patch panel 8 at one of the levels L8-L14 of the second panel section A1 via a respective one of the guide elements E1-E7 of the second guide section B2.

The switch entry positions C1-C7 and the switch exit positions C8-C14 lie in a switch plane T, as shown in figures 17A-17D. In this exemplary embodiment, the switch plane T extends perpendicular or substantially perpendicular to the first stacking direction Dl. The switching of the patch cords 9 can thus be performed in a plane that is at a constant distance from the first panel section A1. In particular, the switch entry positions C1-C7 and the switch exit positions C8-C14 are at the same distance from the first panel section A1 in the first stacking direction D1.

As shown in figures 17A-17D, the switch section C comprises a plurality of redirection members R1-R12 located between the switch entry positions C1-C7 and the switch exit positions C8-C14 for forming a plurality of switch paths for switching the patch cords 9 between any one of the switch entry positions C1-C7 and any one of the switch exit positions C8-C14. Preferably, the plurality of redirection members R1-R12 are strategically placed such that in a group of one switch path for each pair of one of the switch entry positions C1-C7 and one of the switch exit positions C8-C14 all switch paths in the group have the same length within a tolerance of less than twenty percent, and preferably less than ten percent.

Consequently, if all patch cords 9 travel over the same or substantially the same length through the switch section C, said patch cords 9 can leave the switch section C with their mutual length differences substantially unaffected compared to entry of said switch section C at the switch entry positions E1-E7.

As shown in figure 9, the switch section C is provided with a plurality of switch channels K1-K12 for each switch entry position C1-C7. The switch channels Kl- K12 are aligned with, connected to or continuous with the sub-channels H1-H12 of one of the guide elements E1-E7 of the first guide section Bl. Hence, the one or more patch cords 9 placed in the sub-channels H1-H12 can be entered in substantially the same way via the switch channels K1-K12 into the switch section C. This has the technical advantage that - in principle - any patch cord 9 or a bundle of patch cords 9 in the switch channels K1-K12 can be easily tracked back to the first panel section Al, not only by level LI LT, but also by connector 80 or column of connectors 80 of the respective patch panel 8. Optionally, the aforementioned distribution frame 1, 101 may be provided with tensioners (not shown) to reduce or eliminate any remaining slack. Said tensioners may for example be provided at the switch section C and/or at the patch panels 8.

A method for patching patch cords 9 between the entry side SI and the exit side S2 of the aforementioned distribution frame 1, 101 will be elucidated below with reference to figures 1-9, 10A, 10B and 12A-D.

The method generally comprises the steps of:

- placing, installing, mounting or providing a plurality of patch panels 8 at the plurality of levels Ll- L7 of the first panel section A1 ;

- connecting a plurality of patch cords 9 to the patch panels 8 at the first panel section A1 ;

- guiding all patch cords 9 of the plurality of patch cords 9 originating from one of the patch panel 8 of the first panel section A1 via a respective one of the plurality of guide elements E1-E7, E101-E107 of the first guide section Bl, B101 to the switch section C;

- switching the plurality of patch cords 9 received from the guide elements E1-E7, E101-E107 of the first guide section Bl, B101 in the switch section C to any destination at the exit side S2 of the distribution frame 1.

The step of guiding the patch cords via a respective one of the plurality of guide elements E1-E7, E101, E107 of the first guide section Bl more specifically comprises the steps of:

- guiding all patch cords 9 of the plurality of patch cords 9 originating from the patch panel 8 at the first outer level LI of the first panel section A1 via the first outer guide element El, E101 of the first guide section Bl, B101 to the switch section C;

- guiding all patch cords 9 of the plurality of patch cords 9 originating from the patch panels 8 at the intermediate levels L2-L6 of the first panel section A1 via the respective intermediate guide elements E2-E6, E102-E106 of the first guide section Bl, B101 to the switch section C; and

- guiding all patch cords 9 of the plurality of patch cords 9 originating from the patch panel 8 at the second outer level L7 of the first panel section A1 via the second outer guide element E7, E107 of the first guide section Bl, B101 to the switch section C.

The patch cords 9 may be patched to external cables or local equipment directly from the switch section C. However, in the exemplary embodiment as shown in the drawings, the method further comprises the steps of:

- placing, installing, mounting or providing a plurality of patch panels 8 at the plurality of levels L8- L14 of the second panel section A2;

- switching the plurality of patch cords 9 received from the guide elements E1-E7, E101-E107 of the first guide section Bl, B101 in the switch section C to any patch panel 8 at the second panel section A2; and

- guiding the plurality of patch cords 9 through the second guide section B2, B102 to the respective patch panels 8 at the second panel section A2.

Figure 10A shows a possible route, routing or path travelled by a single patch cord 9 through the distribution frame 1. This single patch cord 9 is representative of any other patch cord 9 that is patched using the same method, to patch any source to any destination in the distribution frame 1. Figure 10B shows an alternative second route, routing or path for the single patch cord 9.

In figure 10A, the patch cord 9 travels from a connector 80 of the patch panel 8 at the first outer level LI of the first panel section A1 through the respective transfer element 71 and into the first guide element El to be guided along the first guide path G1. The patch cord 9 exits the first guide element El and is entered into the switch section C via the correspondingly aligned first switch entry position Cl. In the switch section C, the patch cord 9 is switched from the first switch entry position Cl to the third switch exit position CIO. From said third switch exit position CIO, the patch cord 9 is then guided into the corresponding intermediate guide element E10 of the second guide section B2 aligned with said third switch exit position CIO. Finally, the patch cord 9 is led to the patch panel 8 at the corresponding intermediate level L10 of the second panel section A2, to connect to a selected connector 80 at said patch panel 8.

Similarly, figure 10B shows an alternative routing from the highest intermediate level L6 of the first panel section A1 through the corresponding intermediate guide element E6 along the corresponding intermediate guide path G6 and into the switch section C via the sixth switch entry position C6. The patch cord 9 is then switched in the switch section C from the sixth switch entry position C6 to the second switch exit position C9. From said second switch exit position C9, the patch cord 9 is guided into the corresponding intermediate guide element E9 of the second guide section B2 and subsequently led to the patch panel 8 at the lowest intermediate level L9 of the second panel section A2, to connect to a selected connector 80 at said patch panel 8.

In each of the above routes, routings or paths, the patch cords 9 are continuous or uninterrupted from the patch panels 8 of the first panel section A1 at least up to the exit side S2 of the distribution frame 1. More in particular, the patch cords 9 are continuous or uninterrupted from the patch panels 8 of the first panel section A1 up to the patch panels 8 of the second panel section A2. In other words, the switching at the switch section C does not involve interconnecting one or more patch cords 9.

Moreover, because of the slack absorption in the first guide section Bl, the second guide section B2 and optionally in the feed members 84 of the respective patch panels 8, the length differences between the routes, routings or paths of each patch cords 9 from any source patch panel 8 at the entry side SI to any destination patch panel 8 at the exit side S2 can be reduced or minimized. Moreover, slack or excess length in the patch cords 9 can be prevented. Hence, the plurality of patch cords 9 all can have the same or substantially the same length. Conveniently, standardized patch cords 9 can be used in the entire distribution frame 1, regardless of the source and the destination.

Figure 17A shows a selection of seven possible switching paths for a patch cord 9 that enters the switch section C via the first switch entry position Cl. Each one of the seven switching paths leads a respective one of the switch exit positions C8-C14 and can be used to switch the patch cord 9 to any of said switch exit positions C8-C14. Figures 17B and 17C each show a selection of seven possible switching paths when entering the switch section C via the second switch entry position C2 and the seventh switch entry position C7, respectively. Each of the switch paths can be carefully chosen to have a length that is within a tolerance of less than twenty percent and preferably less than ten percent of the other switch paths.

Moreover, the patch cords 9 can optionally be placed in one of the feed channels J1-J12 of the respective patch panel 8 at the first panel 8 and guided through the correspondingly aligned sub-channel H1-H12 of the respective transfer element 71-77, as shown in figure 4, and/or the correspondingly aligned sub-channel H1-H12 of the respective guide element E1-E7, as shown in figures 6, 7 and 8. Said separation of the patch cords 9 per sub channel H1-H12 can even be maintained into the switch section C via the switch channels K1-K12, as shown in figure 9. After the switching in the switch section C, a sub-channel H1-H12 in one of the guide elements E8-E14 of the second guide section B2 can already be preselected by choosing the corresponding switch channel at one of the switch exit positions C8-C14. Said preselection can subsequently be maintained up to the patch panel 8 where the correspondingly aligned feed channel supplies the respective patch cords 9 to a connector 80 or column of connectors 80 at the destination patch panel 8.

Because of the feed channels J1-J12, the sub channels H1-H12 and/or the switch channels K1-K12, the route, routing or path of each patch cords 9 or a bundle of two or more patch cords 9 can be easily tracked backwards and forwards between the source and the destination and can provide a structured and/or systematic approach to either manual or automated patching.

One or more of the aforementioned steps of the method according to the invention may be automated with the use of a mechanical manipulator, i.e. a robot (not shown) . Such a mechanical manipulator may for example comprises one or more grippers and/or fingers to reach into the distribution frame 1, 101 up to a certain patch cords 9 or bundle of one or more patch cords 9 to manipulate the position thereof. In particular, the mechanical manipulator may be used to perform the initial task of patching the patch cords 9 between the entry side SI and the exit side S2 by guiding the patch cords 9 through the distribution frame 1. The mechanical manipulator may also be used to perform more complex tasks such as rerouting, removing and/or replacing one or more patch cords 9 after the initial patching. It is convenient when the mechanical manipulator has two or more grippers or fingers so that patch cords 9 are never let go during the patching, even when crossing other patch cords 9.

It is to be understood that the above description is included to illustrate the operation of the preferred embodiments and is not meant to limit the scope of the invention. From the above discussion, many variations will be apparent to one skilled in the art that would yet be encompassed by the scope of the present invention.

For example, figures 12, 13 and 14 show further alternative distribution frames 201, 301, 401 according to a third embodiment, a fourth embodiment and a fifth embodiment, respectively, of the present invention.

As shown in figure 12, the alternative distribution frame 201 according to the third embodiment of the invention differs from the aforementioned distribution frames 1, 101 in that the guide elements E201-E207 of the first guide section B201 face away from the guide elements E208-E214 of the second guide section B202. In this way, more room is created in the center for receiving local equipment, i.e. equipment of a data center.

As shown in figure 13, the alternative distribution frame 301 according to the fourth embodiment of the invention differs from the aforementioned distribution frames 1, 101, 201 in that it actually comprises two distribution frames 1, 1' according to the first embodiment of the invention. The two distribution frames 1, 1' are mirrored in a horizontal plane at the switch section C. For conciseness, the distribution frame 1 at the top is hereafter referred to as the upper distribution frame 1 and the distribution frame 1' at the bottom is hereafter referred to as the lower distribution frame 1'. The lower distribution frame 1' may have substantially the same components as the upper distribution frame 1 or it may have a different configuration, i.e. one of the alternative embodiments being discussed here. By having the two distribution frames 1, 1', the switch section C can not only switch between the first panel section A1 and the second panel section A2 of the upper distribution frame 1, but also to the first panel section A1 ' and/or the second panel section A2 ' of the lower distribution frame 1'.

Further alternatives are envisioned in the distribution frames may be placed back-to-back or side-by- side, with the switch section being able to switch the patch cords from one distribution frame to the other. In this way, the capacity can be increased considerably without substantially increasing the footprint.

As shown in figure 14, the alternative distribution frame 401 according to the fifth embodiment of the invention differs from the aforementioned distribution frames 1, 101, 201, 301 in that the first panel section A401 and the second panel section A402 are arranged for receiving the patch panels 8 in a stepped configuration. In particular, the patch panels 8 are increasingly offset in the lateral direction Y of the distribution frame 401 considered from the respective first outer levels LI, L8 to the respective second outer levels L7, L14. The offset of the patch panels 8 in the lateral direction Y already compensates a part of the slack or length differences between the levels L1-L7, L8-L14. This concept may be applied to any one of the previously discussed embodiments.

Figure 14 further shows that the exit positions of the guide elements E401-E407 of the first guide section B401 do not necessarily have to be directly below the entry positions of the same guide elements E401-E407 in the feeding direction F. Instead, when the switch entry position C401-C407 are offset with respect to the entry positions of the guide elements E401-E407 in the lateral direction Y of the distribution frame 401, said offset can be used to further compensate for at least a part of the slack or length differences. The switch section C may for example be considerably wider or narrower than the respective entry positions of the guide elements E401-E407. In this specific example, for each level L1-L7, the sum of the length travelled by each patch cord in the feed direction F and in the lateral direction Y is the same or substantially the same for each level L1-L6.

Figure 14 further shows that the first panel section A401 comprises a transfer element 471-477 for each level L1-L7 to transfer all of the patch cords of the plurality of patch cords originating from the respective level L1-L7 towards or up to the first guide section B401. The transfer elements 471-477 extend parallel to or in a direction with at least a component parallel to the first stacking direction Dl. The transfer elements 471-477 are aligned with the guide elements E401-E407. In figure 14, the transition from the first panel section A401 to the first guide section B401 is located where the transfer elements 471-477 meet or merge into the guide elements E401-E407, i.e. where the guide paths change direction from the first stacking direction Dl into the lateral direction Y. The transition is shown schematically with the oblique broken line between the first panel section A401 and the first guide section B401.

Figure 15 shows a further alternative distribution frame 501 according to a sixth embodiment of the invention that differs from the previously discussed embodiments in that the switch section C is arranged in the lateral direction Y between the first panel section A501 and the second panel section A502. Hence, the panel sections A501, A502 extend more or less alongside the switch section C500. The first panel section A501 again has a transfer element 571-576 for each level L1-L6 that extends parallel to or in a direction with at least a component parallel to the first stacking direction Dl before feeding the patch cords into the corresponding guide elements E501-E506 of the first guide section B501. The transition between the first panel section A501 and the first guide section B501 is shown schematically with the oblique broken line. It will be clear to one skilled in the art that the patch cords from one level will have to travel a shorter or a longer distance in the respective stacking direction Dl, D2 through the transfer elements 571-576 of the respective panel section A501, A502 to reach the respective guide section B501, B502 than the patch cords originating from another level. Hence, considered in the first stacking direction Dl, the base level or first outer level LI is still closest to the first guide section B501 and the top level or second outer level L6 is still furthest away from the first guide section B501. Hence, the guide sections B501, B502 are designed such that the guide paths have incrementally longer lengths to compensate accordingly .

In this exemplary embodiment, the guide sections B501, B502 are arranged for feeding the patch cords into the switch section C500 and receiving the patch cords from the switch section C500 at the same side of the switch section C500. The switch section C500 is further provided with a plurality of redirection members R501-R503 for redirecting the patch cords from a source to a destination.

It is further noted that the patch panels 508 are arranged in such a way that the connectors are above each other in the first stacking direction Dl. The offset between the connectors can already be at least partially compensated in the first panel section A501 by guiding the patch cords through subchannels (not shown) with different radii .

Figure 16 shows a further alternative distribution frame 601 according to a seventh embodiment of the invention that is similar to the distribution frame 501 according to the sixth embodiment of the invention in that the switch section C600 is again located between the first panel section A601 and the second panel section A602 in the lateral direction Y. Moreover, the first panel section A601 again has a transfer element 671-676 for each level L1-L6 that extends parallel to or in a direction with at least a component parallel to the first stacking direction Dl before feeding the patch cords into the corresponding guide elements E601-E606 of the first guide section B501. However, in this embodiment, the first guide section B601 is arranged to feed the patch cords into the switch section C600 from one side and the second guide section B602 is arranged for receiving the patch cords from the switch section C600 at another side. More in particular, the first guide section B601 and the second guide section B602 are on opposite sides of the switch section C600. This configuration can be more compact because the patch cords can travel through the switch section C600 rather than entering and exiting at the same side. The switch section C600 features a plurality of redirection members R601, R602 similar to the redirection members R501-R503 of the previous embodiment. The patch panels 608 in this embodiment are the same or similar in configuration to the patch panels 508 as previously discussed.

In summary, the invention relates to a distribution frame 1, 101, in particular an optical distribution frame, for patching patch cords 9 between an entry side Si and an exit side S2 of the distribution frame 1, 101, wherein the distribution frame 1, 101 comprises a first panel section Al, a switch section C and a first guide section Bl, B101 between the first panel section Al and the switch section C, wherein the first guide section Bl, B101 comprises guide elements E1-E7, E101-E107 for guiding all patch cords 9 originating from the patch panels 8 along respective guide paths G1-G7, G101, G107, wherein the guide paths G1-G7, G101, G107 have different lengths, wherein the switch section C is arranged for switching the plurality of patch cords 9 received from the plurality of guide elements E1-E7, E101, E107 of the first guide section Bl, B101 to any destination at the exit side E2 of the distribution frame 1, 101. The invention further relates to an assembly of the distribution frame 1, 101 and the patch panels 8, to a patch panel 8 for use in said assembly and to a method for patching patch cords 9 between an entry side Si and an exit side S2 of the distribution frame 1, 101.

Claims

C L A I M S

1. Distribution frame, in particular an optical distribution frame, for patching patch cords between an entry side and an exit side of the distribution frame,

wherein the switch section is arranged for switching the plurality of patch cords received from the plurality of guide elements of the first guide section to any destination at the exit side of the distribution frame, wherein the plurality of levels of the first panel section comprises a first outer level, a second outer level and a plurality of intermediate levels incrementally spaced apart between the first outer level and the second outer level in a first stacking direction, wherein each level of the plurality of levels is arranged for receiving a patch panel to form a first stack of patch panels, wherein the plurality of guide elements comprises a first outer guide element for guiding all patch cords of the plurality of patch cords originating from the patch panel at the first outer level of the first panel section along a base guide path, a second outer guide element for guiding all patch cords of the plurality of patch cords originating from the patch panel at the second outer level of the first panel section along a second outer guide path and a plurality of intermediate guide elements for guiding all patch cords of the plurality of patch cords originating from the respective patch panels at the intermediate levels of the first panel section along respective intermediate guide paths,

wherein the first outer guide path is the longest, the second outer guide path is the shortest and the intermediate guide paths have incrementally longer lengths from the second outer guide element towards the first outer guide element.

2. Distribution frame according to claim 1, wherein the first outer level is closest to the first guide section in the first stacking direction and the second outer level is furthest away from the first guide section in the first stacking direction.

3. Distribution frame according to claim 1 or 2, wherein the first outer level is a base level and the second outer level is a top level.

4. Distribution frame according to any one of the preceding claims, wherein the plurality of levels are spaced apart over a spacing increment, wherein the lengths of the guide paths incrementally increase with a length increment that is at least equal to the spacing increment between the respective levels.

5. Distribution frame according to any one of the preceding claims, wherein the first guide section is located in the first stacking direction between the first panel section and the switch section.

6. Distribution frame according to any one of the preceding claims, wherein the first panel section is arranged for incrementally offsetting the patch panels of the first stack from the first outer level to the second outer level in a first offset direction transverse or perpendicular to the first stacking direction, wherein the plurality of guide elements of the first guide section are incrementally offset from the first outer guide element to the second outer guide element in the same first offset direction .

7. Distribution frame according to claim 6, wherein the first outer guide element, the intermediate guide elements and the second outer guide element of the first guide section are arranged for guiding the plurality of patch cords in a first outer guide plane, intermediate guide planes and a second outer guide plane, respectively, which are mutually parallel and incrementally offset in the first offset direction.

8. Distribution frame according to claim 7, wherein the first offset direction is perpendicular to the first outer guide plane.

9. Distribution frame according to any one of claims 6-8, wherein the first panel section is arranged for incrementally offsetting the patch panels of the first stack in the first offset direction over an offset increment, wherein the plurality of guide elements of the first guide section are offset over the same or substantially the same offset increment in the same first offset direction.

10. Distribution frame according to any one of the preceding claims, wherein the number of guide elements of the first guide section is equal to the number of levels in the first panel section.

11. Distribution frame according to any one of the preceding claims, wherein the first panel section for each level of the plurality of levels comprises a transfer element to transfer all of the patch cords of the plurality of patch cords originating from the respective level towards or up to the first guide section, wherein each guide element of the plurality of guide elements of the first guide section is aligned with or connected to one of the transfer elements of the first panel section.

12. Distribution frame according to claim 11, wherein each transfer element extends parallel to or in a direction with at least a component parallel to the first stacking direction before feeding the patch cords into the corresponding guide elements of the first guide section.

13. Distribution frame according to any one of the preceding claims, wherein each guide element of the plurality of guide elements of the first guide section comprises a guide channel extending along at least a part of the respective guide path.

14. Distribution frame according to claim 13, wherein each guide channel extends along at least half the length of the respective guide path and preferably along at least three-quarters of the length of the respective guide path .

15. Distribution frame according to claim 13 or 14, wherein the guide channel is continuous along the length of the respective guide path.

16. Distribution frame according to any one of claims 13-15, wherein each guide channel comprises a plurality of sub-channels, wherein each sub-channel is arranged for guiding one or more of the plurality of patch cords of the respective patch panel along at least a part of the respective guide path.

17. Distribution frame according to claim 16, wherein the plurality of sub-channels are provided at least at one or more positions where the respective guide path changes direction.

18. Distribution frame according to claim 16 or 17, wherein each sub-channel extends along at least half the length of the respective guide path and preferably along at least three-quarters of the length of the respective guide path.

19. Distribution frame according to any one of claims 16-18, wherein the sub-channels are continuous along the length of the respective guide path.

20. Distribution frame according to any one of claims 16-19, wherein the plurality of sub-channels extend mutually parallel, side-by-side in a common plane.

21. Distribution frame according to claim 20, the orientation of the common plane is twisted at least once along the respective guide path.

22. Distribution frame according to any one of the preceding claims, wherein each guide elements of the first guide section is arranged for receiving the plurality of patch cords from the first panel section in a feeding direction and for discharging the plurality of patch cords to the switch section in the same feeding direction, wherein the respective guide path in each guide element extends partially transverse to the feeding direction.

23. Distribution frame according to any one of the preceding claims, wherein the first outer guide element of the first guide section is formed by a sequence of geometric shapes, wherein the intermediate guide elements of the first guide section have the same sequence of geometric shapes, wherein one or more of the geometric shapes have incrementally smaller proportions from the first outer guide element towards the second outer guide element of the first guide section.

24. Distribution frame according to claim 23, wherein the guide elements are nested one inside the other from the first outer guide element towards the second outer guide element of the first guide section.

25. Distribution frame according to any one of the preceding claims, wherein the distribution frame at the exit side comprises a second panel section with a plurality of levels for receiving patch panels and a second guide section between the switch section and the second panel section for guiding the patch cords from the switch section to the second panel section.

26. Distribution frame according to claim 25, wherein each level of the plurality of levels of the second panel section is arranged for receiving a patch panel to form a second stack of patch panels in a second stacking direction parallel or substantially parallel to the first stacking direction.

27. Distribution frame according to claim 26, wherein the plurality of levels of the second panel section are at the same level as or correspond to the plurality of levels of the first panel section.

28. Distribution frame according to any one of claims 25-27, wherein the second guide section comprises a plurality of guide elements having the same or substantially the same features as the plurality of guide elements of the first guide section.

29. Distribution frame according to any one of claims 25-28, wherein the second panel section is mirrored to the first panel section about a mid-plane between the entry side and the exit side.

30. Distribution frame according to any one of claims 25-29, wherein the second guide section is mirrored to the first guide section about a mid-plane between the entry side and the exit side.

31. Distribution frame according to any one of the preceding claims, wherein the switch section for each guide element of the plurality of guide elements of the first guide section comprises a switch entry position for receiving the patch cords from the respective guide element .

32. Distribution frame according to claim 31, wherein the switch entry positions are aligned with the guide paths defined by the respective guide elements of the first guide section.

33. Distribution frame according to claim 31 or 32, wherein the switch entry positions are all at the same or substantially the same distance from the first panel section .

34. Distribution frame according to any one of claims 31-33, wherein the switch section comprises a plurality of switch exit positions for receiving the plurality of patch cords from any one of the switch entry positions and for supplying said plurality of patch cords to any destination at the exit side, wherein the switch section is arranged for switching the plurality of patch cords between the plurality of switch entry positions and the plurality of switch exit positions.

35. Distribution frame according to claim 34, wherein the switch entry positions and the switch exit positions lie in a switch plane that extends perpendicular or substantially perpendicular to the first stacking direction .

36. Distribution frame according to claim 34 or 35, wherein the switch section further comprises a plurality of redirection members located between the switch entry positions and the switch exit positions for forming a plurality of switch paths for switching the patch cords between any one of the switch entry positions and any one of the switch exit positions.

37. Distribution frame according to claim 36, wherein the plurality of redirection members are strategically placed such that in a group of one switch path for each pair of one of the switch entry positions and one of the switch exit positions all switch paths in the group have the same length within a tolerance of less than twenty percent, and preferably less than ten percent.

38. Assembly of a distribution frame according to any one of the preceding claims and a plurality of patch panels distributed over the plurality of levels.

39. Method for patching patch cords between an entry side and an exit side of a distribution frame, in particular an optical distribution frame, according to any one of claims 1-37, wherein the method comprises the steps of :

a) providing a plurality of patch panels at the plurality of levels of the first panel section;

b) connecting a plurality of patch cords to the patch panels at the first panel section;

40. Method according to claim 39, wherein step c) comprises the steps of:

41. Method according to claim 39 or 40, wherein the plurality of patch cords are continuous or uninterrupted from the patch panels of the first panel section up to the exit side of the distribution frame.

42. Method according to any one of claims 39-41, wherein the distribution frame at the exit side comprises a second panel section with a plurality of levels for receiving patch panels and a second guide section between the switch section and the second panel section, wherein the method further comprises the steps of: e) providing a plurality of patch panels at the plurality of levels of the second panel section;

43. Method according to claim 42, wherein the plurality of patch cords are continuous or uninterrupted from the patch panels of the first panel section up to the patch panels of the second panel section.

44. Method according to any one of claims 39-43, wherein the plurality of patch cords all have the same or substantially the same length.

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RM/HZ