JP3057193B2 - MDF device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a main distribution frame (MDF) composed of a plurality of blocks. More specifically, in an MDF composed of a plurality of blocks, it is possible to adjust the usage rate of a core wire accommodated in each block (the ratio of connection to an intra-office device), and to block the MDF (line-side terminal is connected to a desired intra-office device). Cannot be connected to the
The present invention relates to an MFD device capable of reducing the probability of occurrence of the MFD.

[0002]

2. Description of the Related Art FIG. 6 shows a conventional MDF device.
Numeral 51 indicates a line cable, 52₁
~ 52_nIs the core wire group, 53₁~ 53_nIs the track side contact
Connection terminal, 54 is an MDF device, 55₁~ 55_nIs a block
H, 56 is a crossover, 57₁~ 57 _nIs the internal device connection terminal
Represents.

In the MDF device 54, a plurality of blocks 55
₁~ 55_nAnd the in-station device connection terminal 57₁~ 57
_nIs connected to the intra-office device (here, the intra-office device is shown
Not shown), line side connection terminal 53₁~ 53_nThe track
Cable core group 52₁~ 52 _nAre connected.
Core wire in core wire group connected to each block is own block
In principle, connect to the in-house equipment belonging to
If there are no in-station devices that can be connected to the
Connect to other blocks via 56.

FIG. 7 is a diagram for explaining the above blocks, and shows a case of a so-called manual MDF. In the figure, numerals 55 ₁ , 55 _n are blocks, 56
Is a crossover, 58 _{11 to} 58 _n3 is a line side terminal pair, 59 _{11 to} 5
9 _n3 is a station inside terminal pair, 60 _{11 to} 60 _n2 is a line line pair, 6 _n
1 ₁₁ to 61 _n3 is intra-station line pairs 62 ₁ to 62 ₃ represents a jumper wire pair.

FIG. 1 shows an example in which the line side terminal pair of each block is 3, the station inside terminal pair is 3 and the number of crossovers is one. The third terminal pair is connected in parallel in each block, and the blocks are connected to each other by a crossover 56.

The connection between the line-side terminal pair and the station-side terminal pair is performed as follows. The connection between the line side terminal pair and the station inside terminal pair is performed using a jumper wire pair. In the figure, an example of the connection between the own block, and shows an example of connections between other blocks, as an example of the connection between the own block, line-side terminal pairs by a jumper line pairs 62 ₁ 58 ₁₁ shows a connection between the station inside terminal pair 59 ₁₁ .

[0007] Examples of the connections between other blocks, connected between the line side terminal pair 58 ₁₂ and station-side terminal pair 59 ₁₃ by jumper wire pairs 62 _2,該局inner terminal pair 59 ₁₃
Depending connecting wire 56 is connected to the other blocks 55 _n of station-side terminal pairs 59 _n3 and line-side terminal pairs 58 _n3,該線roadside terminal pair 58 _n3 is, the jumper wire pair ₆₂₃ to station terminal pair 59 _n2 Connected, resulting in block 55 ₁
Of the line side terminal pair 58 ₁₂ is connected to the 55 _n station inside terminal pair 59 _n2 which is another block.

In the above description, the group of the line side terminal pairs for each block is the line side connection terminals 53 _{1 to} 53 _n of FIG. 6, and each of the blocks except for the terminal connected to the crossover of the station inside terminal pair. group corresponds to the intra-station device connecting terminals 57 ₁ to 57 _n.

[0009] In the MDF apparatus, the number of line-side connection terminals is generally provided to be larger than the number of station-side connection terminals. If the number of inside terminal connections is exceeded (the usage rate of the core wire exceeds a predetermined value), the connection is made to the intra-station device of another block via the crossover 56 as described above.

Generally, the usage rate of line cables (all core wires) is 50 to 60%, and the total number of in-station device connection terminals is selected to be about 60% of the total number of line side connection terminals. However, there is a difference in the usage rate when the core wire group connected to each block is viewed as a unit, and a group having a high usage rate and a group having a low usage rate are generated.

A group having a high core wire utilization rate includes a core wire that provides a service that could not be connected in its own block to a crossover wire 56.
Is connected to the intra-office device of another block via the network. However, in order to enable this connection without restriction (blockage), many crossovers are required. However, this is not economical and the number of crossovers is limited. In other words, a case where connection is not possible is allowed to occur considerably.

[0012]

As is apparent from the above description, the conventional MDF device has a low usage rate as a line cable, but has a low usage rate when there is a deviation between the core groups in each block unit. However, there is a disadvantage that a desired connection cannot be made in a portion where the deviation becomes larger.

An object of the present invention is to provide an MDF apparatus capable of reducing the probability that the desired connection cannot be made.

[0014]

According to the invention, the above-mentioned object is solved by the means described in the claims.

That is, according to the first aspect of the present invention, there is provided a main distribution frame (MDF) for connecting a transmission line and an intra-office device.
The DF connection part is divided into a plurality of blocks, a wire bundle connected to the input side (line side) terminal of each block is divided into a plurality of groups, and each of the divided wire bundles is further divided into a plurality of groups. And connect a multi-pole plug (hereinafter also referred to as a connector) to each,

On the other hand, the core wire of the line cable is divided into a plurality of groups, and each of the divided core wire bundles is divided into a plurality of groups, and each of the bundles has a structure capable of being coupled to the above-mentioned multipolar connector. A structure in which a plug is connected, and between the multi-pole plug of the conductor connected to the input terminal of the block and the multi-pole plug connected to the core wire of the line cable, it can be electrically connected to an arbitrary counterpart. M
It is a DF device.

According to a second aspect of the present invention, in the MDF device according to the first aspect, the multipole plug-connecting portion is mounted separately from the MDF device.

Since the MDF device of the present invention has the above-described configuration, when the usage rate of the core wire group connected to the line side of each block increases, the block and the connector of the low usage rate are used. By changing the connection, replacement can be performed in units of line groups, and the usage rate of the core group of each block can be averaged. As a result, the effect of significantly improving the probability that the desired connection cannot be obtained is obtained.

[0019]

FIG. 1 shows a first embodiment of the present invention.
Is a diagram showing an example in which the input side of each block is divided into three, and a numeral code 1 is an MDF device, 2 ₁₁ to 2 _n3
Is the line side connector, 3 _{11 to} 3 _n3 are the block side connectors,
4 ₁ to 4 _n is the line-side connection terminal block, 5 ₁ to 5 _n blocks, among these subscripts portion first subscript numbers of the block, that the second subscript divides the inlet side of the block Represents a number indicating each of the following. This is the same in the following drawings.

The input terminal of each block is divided into three in this embodiment, and each is connected to the block connector via a line group. More specifically, the first block 5
Line-side connection terminals 4 _{1 1} is connected via a 3 divided line groups to block side connector 3 ₁₁ to 3 _n3.

Correspondingly, the core group side of the line cable is also divided into three parts and connected to the line side connector. Further In detail, the first wire group 8 ₁ is divided into three, each line connector 2 _{11-2 13,} the second core group 8 ₂ is divided into three, each line connector 2 _{21-2 23} In addition, the n-th core group 8 _n is divided into three and connected to the line-side connectors 2 _n1 to 2 _n3 , respectively.

The line-side connector 2 ₁₁ to 2 _n3 is engaged bite block connector 3 ₁₁ to 3 _n3, the strands of the line cable is connected to the line side connection terminals 4 ₁ to 4 _n of each block. Each block makes necessary connections, and connects the core wire connected to the line side connection terminal to the intra-office device connection terminal, so that a so-called jumper is performed. FIG. 1 shows the connection relationship of the connectors in the initial state. When the usage rate of the core wires in the core wire group becomes high, the connection of the connectors is changed.

FIG. 2 shows this connection change.
For example, the first core group 8 ₁ of core utilization is high, when the second core group 8 _second core utilization is low change each part of the connector. In this example, the connection destination of 2 ₁₃ is 3 ₂₁ ,
By instead connecting 2 ₂₁ of the connection destination to 3 _13, it can be allowed to lower the core usage in line-side connection terminal 4 _1, as a result, can prevent the occurrence of clogging due to the connecting wire 9 is insufficient Will be.

FIG. 3 is a view for explaining a detailed structure for enabling the connection change of the connectors in the description of FIGS. 1 and 2, and shows an example in which the block side connector is fixed to the panel. Numeral 10 indicates a panel for fixing the connector.

[0025] The block-side connector 3 _{11-3 23} panel 1
0, and the bundle portion of the divided core group of the line side connector has an extra length as shown in FIG.

When the connection of the connector is changed, it is required to connect to a connector farther from the position before the connection is changed, but as shown in FIG.
The extra length can compensate for the distance extension at the connection destination.

In the above description, an example in which the line-side connector has a movable structure is shown. However, the present invention is not limited to this, and the line-side connector may be fixedly attached to the panel and the block-side connector may be movable. It is good also as a structure which is not fixed.

FIG. 4 is a diagram showing a second example of the embodiment of the present invention, in which the connector connection portion has a mounting structure separated from a block portion that performs a jumper.
Numeral designations 11 and 12 are mounted housing, 13 ₁ to 13 _n represents a group of lines.

The block portion is mounted on the mounting housing 11, and the connector connecting portions, that is, the line-side connectors 2 ₁₁ to 2 _{n3 and the} block-side connectors 3 _{11 to} 3 _n3 are mounted on the mounting housing 12. During mounting housing 11 and 12 are connected by the lines 13 ₁ to 13 _n.

Therefore, the allowable line lengths of the line groups 13 _{1 to} 13 _n (mainly the line resistance and the loss are the limiting factors and are not substantially restricted, so that there is no need to be aware of the allowable line lengths). Within the range of (equal to), both mounting housings can be placed at arbitrary positions, for example, the mounting housing 11 can be placed in a station or a box where the converter is housed, and the mounting housing 12 can be placed on a pole or a manhole. It is possible.

In the above description, the MDF network configuration having a crossover between blocks has been described. However, the present invention is not limited to this. For example, a three-stage network configuration can reduce the link block rate. Thus, the present invention can be applied without depending on the network configuration.

Further, the number of line-side connectors and the number of block-side connectors may not be the same. For example, when the number of line-side connectors is set smaller than the number of block-side connectors, and a core group having a high usage rate is generated. It is also possible to replace some of the connectors in them with the block-side connectors of other vacant blocks.

In the subscriber line, a terminal box for connecting a feeder cable and a wiring cable with a connector is used. This connector is also used (diverted) as a line-side connector or a block-side connector according to the present invention. It is also possible to do so, and such a configuration is also included in the present invention.

FIG. 5 is a view for explaining the above configuration as a third example of the embodiment of the present invention, and numeral 14 indicates a feeder cable. A part of the feeder cable 14 is drawn out to a connection terminal box, and a connector 15 for connection is connected thereto. A connector connected to a distribution cable (corresponding to the line cable 7 in FIG. 5) is engaged with the connector. Is done. This connector can be used as a block side connector and a line side connector, respectively.

In the above description, the present invention is mainly applied to the case where the present invention is applied to a manual MDF in which connection in a block is directly performed by a jumper wire or the like. However, in the present invention, switching in a block is performed by remote control. It goes without saying that the present invention can be applied to an MDF device of a control type or an MDF device having a processor and of automatically narrowing down.

[0036]

As described above, according to the present invention,
When the usage rate of the core group connected to the line side of each block increases, the connection rate of the core group of each block can be easily averaged by changing the connector. Even in the case of the MDF having the conventional network configuration, there is an advantage that it is possible to realize good connectivity in which blockage does not easily occur.

[Brief description of the drawings]

FIG. 1 is a diagram showing a first example of an embodiment of the present invention.

FIG. 2 is a diagram illustrating a case where a connector connection is changed in the first example of the embodiment of the present invention;

FIG. 3 is a diagram illustrating an example of a structure around a connector.

FIG. 4 is a diagram showing a second example of the embodiment of the present invention.

FIG. 5 is a diagram showing a third example of the embodiment of the present invention.

FIG. 6 is a diagram illustrating a conventional MDF device.

FIG. 7 is a diagram illustrating a block.

[Explanation of symbols]

1 MDF apparatus 2 ₁₁ to 2 _n3 line connector 3 ₁₁ to 3 _n3 block-side connector 4 ₁ to 4 _n line side of the block connection terminals 5 ₁ to 5 _n blocks 6 ₁ to 6 _n-station apparatus connecting terminals 7 line cable 8 ₁ ８8 _n- core wire group 9 crossover 10 panel for fixing connector 11, 12 mounting housing 13 ₁ １３13 _n wire group 14 feeder cable 15 connector

──────────────────────────────────────────────────続 き Continuing on the front page (72) Kazuo Hamasa, Inventor, Nippon Telegraph and Telephone Corporation 3-9-1-2 Nishishinjuku, Shinjuku-ku, Tokyo (56) References JP-A-59-67794 (JP, A) JP-A-52-149906 (JP, A) JP-A-49-131316 (JP, A) JP-A-59-119992 (JP, A) JP-A-4-119909 (JP, A) JP-A-8-205207 (JP, A) Japanese Utility Model Showa 54-46212 (JP, U) (58) Fields surveyed (Int. Cl. ⁷ , DB name) H04Q 1/00-1/16

Claims (2)

(57) [Claims] 1. A main wiring board (MDF) for connecting a transmission line and an intra-office device, wherein an MDF connecting portion is divided into a plurality of blocks, and a lead bundle connected to an input side (line side) terminal of each block. was divided into a plurality of groups, further divided into the plurality of divided flock each conductor bundle which connects the multipolar plug connector respectively, while the core of the line cable, is divided into a plurality of groups, further
Each of the divided core bundles is divided into a plurality of groups, and a multi-pole plug having a structure that can be coupled to the multi-pole plug is connected to each group.
And, between the multipolar plug connector which is connected to the core wire of the multipole plug connector and the line cable conductors connected to the input side terminal of the block, it has a structure capable of connecting any the mating electrical An MDF device characterized by the above-mentioned. 2. A structure for connecting multipole plugs to each other,
2. The MDF device according to claim 1, wherein the MDF device has a mounting structure separated from the DF connection unit.