JPH0993621A - 3-stage link structure of automatic main wiring board device - Google Patents

Abstract

(57) [Summary] [Purpose] To improve the compatibility with a cable with a three-stage link structure and share parts. [Structure] The first-stage matrix group in the three-stage link structure of 2000 terminals has 64 basic matrices M ₁ 1
~M ₁ 64,2 stage matrix groups 64 each basic matrix M ₂ 1~M ₂ 64,3 stage matrix group is 4
8 each composed of the basic matrix M ₃ 1~M ₃ 48. When each basic matrix composed of a matrix board 50 × 64, the basic matrix M ₁ 1 to M ₁ 6
4 incoming line of the subscriber line of it is easy easier to take matching with the 100 of the set unit, the outgoing line of the basic matrix M ₃ 1~M ₃ 48, it becomes easy easier to take the integrity of the station cable. Furthermore, for scales other than 2000 terminals, 50 x 64
If the basic matrix is configured with the board, the matching can be ensured and the parts can be shared.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic MD for jumpering a main wiring board (hereinafter referred to as MDF) for connecting a telephone exchange and a subscriber line using a matrix of a plurality of stages.
It relates to the F device.

[0002]

2. Description of the Related Art FIG. 2 is a diagram for explaining a link structure of a conventional automatic MDF device. Conventional automatic MDF devices have individual link configurations depending on the number of target subscribers and the scale of the telephone exchange that accommodates those subscribers. For example, as shown in FIG. 2, when the number of terminals of the exchange is about 2000 terminals and the number of lines of subscriber lines is 3600, the matrix group of each stage has the number of incoming lines x the number of outgoing lines (or the number of outgoing lines x incoming lines). number)
Was composed of a plurality of basic matrices of 47 × 89.
That is, the first-stage matrix group on the subscriber line side is composed of 80 basic matrices, and the number of incoming lines × the number of outgoing lines of each of these basic matrices is 47 × 89. In each of the first-stage basic matrices, 45 out of 47 incoming lines are used and all 89 outgoing lines are used. Second matrix group is 8
It is composed of nine basic matrices, and the number of incoming lines × the number of outgoing lines of each basic matrix is 89 × 47. In each basic matrix in the second row, 8 out of 89 incoming lines
0 lines are used and all 47 outgoing lines are used. The third matrix group on the exchange side is composed of 47 basic matrices, and the number of incoming lines × the number of outgoing lines of each basic matrix is 89 × 45. In the basic matrix on the exchange side, all 89 incoming lines are used and 45 out of 47 outgoing lines are used. The matrix group on the subscriber line side, the matrix group on the middle side, and the matrix group on the exchange side are linked by an interstage cable. Each basic matrix is formed by a matrix board. By using the matrix board, a plurality of difference points are formed so that the incoming line and the outgoing line are orthogonal to each other, and the desired incoming line and outgoing line are connected by selecting the different points and piercing the connecting pin. That is,
The choice of the difference point connects any subscriber line to the desired terminal of the exchange.

[0003]

However, the conventional automatic MDF device link structure has the following problems. Since the link configuration of the automatic MDF device is individually configured according to the number of target subscribers and the scale of the telephone exchange that accommodates those subscribers, the individual matrix boards are used according to them. Therefore, the basic matrix of the matrix board cannot be shared, and the economy is poor. Also, in terms of software applicability, it was difficult to deal with them in a unified manner. Furthermore, connector coupling in each basic matrix is irregular on both the subscriber line side and the exchange side. That is, the multiple pairs of subscriber cables are usually configured to accommodate subscribers in multiples of 100, and the intra-station system cables connected to the exchange are basically configured in multiples of 16 or 32. Therefore, for example, in the conventional automatic MDF device, the number of incoming lines of the basic matrix on the subscriber line side is 45, and the number of outgoing lines of the basic matrix on the exchange side is 45. It is a bad number. That is, it was inefficient in terms of workability, maintenance and operation. Further, the inter-stage cable inside the device is also illegal because it links 89 and 80 and 47 and 89 between the basic matrices, and the cable was inefficient.

[0004]

In order to solve the above-mentioned problems, a first invention has a three-stage matrix group for forming a line, and selects a subscriber line and a switch by selecting a difference point in each matrix. In the three-stage link structure of the automatic main wiring board device in which a line is formed between the desired terminals, the following configuration is adopted. That is, apart from the test paths added by the required amount, the basic matrix for forming a plurality of lines forming the matrix group of each stage has the number of incoming lines × the number of outgoing lines or the number of outgoing lines × the number of incoming lines × 50 × It is formed by a matrix of 64 or 25 × 32. According to a second invention, in the first invention, the first-stage matrix group, the second-stage matrix group on the subscriber side and the third-stage matrix group on the exchange side in the three-stage matrix group are respectively formed. The number of the basic matrices is configured in a ratio of 4: 4: 3.

[0005]

According to the first aspect of the present invention, since the three-stage link structure is constructed as described above, the basic matrix forming the matrix group of each stage provides a line between an arbitrary subscriber line and a desired terminal of the exchange. It is formed. Here, the plurality of basic circuits for forming a line are respectively formed by a matrix in which the number of incoming lines × the number of outgoing lines or the number of outgoing lines × the number of incoming lines is 50 × 64 or 25 × 32, and a three-stage link structure is realized as a device. In this case, it is easy to carry out the division mounting, and it is compatible with the unit 100 of the subscriber line group, and the unit 16 of the intra-station cable on the exchange side.
Or, the matching with 32 can be obtained. According to the second invention, the number of basic matrices of the first-stage matrix group, the second-stage matrix group and the third-stage matrix group in the first invention is 4: 4: 3, and the basic matrix of each stage is The unit for connecting the cables is a multiple of 16 as the unit for the cable in the office. Therefore, the above problem can be solved.

[0006]

1 (a) and 1 (b) are views for explaining a three-stage link structure of a 2000-terminal automatic MDF device showing an embodiment of the present invention. The feature of the present embodiment is that the automatic MDF device for forming a line between the subscriber line and the desired terminal of the exchange has three parts.
In the multi-stage link structure, the structure of the basic matrix for line formation is 50 × 64 regardless of the number of subscribers and the scale of the exchange.
And That is, a matrix board having a common size is used. However, additional paths for testing or transfer to other equipment will be added as necessary. As shown in FIG. 1A, the basic matrix structure formed on the matrix board has 50 incoming lines and 64 outgoing lines. The required number of incoming lines and outgoing lines is validated and used. The difference between the effective incoming line and outgoing line is selected and any incoming line is connected to the desired outgoing line. In the following basic matrix notation, the number of valid incoming lines is displayed on the left side of the rectangular frame representing the basic matrix, and the number of valid outgoing lines is displayed on the right side.

First, there are 10 subscriber lines that accommodate subscribers.
The cable has a multi-core structure with a multiple of 0 and is already installed in the city. The number "50" in the structure of the basic matrix is effective in correspondence with a multiple of 100 of this subscriber line. Further, "50" is also a number close to 48 for supporting the exchange, and is also effective for the link configuration. On the other hand, the number "64" is valid (coded as 1 byte (8) as a unit in a general digital circuit) because the circuit set on the telephone exchange side is a multiple of 8. Also, "64" is about 3 more than "50".
This is a 0% larger value.
It will be effective. Here, as the structure of the basic matrix, a double structure of 100 × 128 and half of the structure of 25 × 32 are conceivable. However, in order to be commonly applied to small-scale to large-scale automatic MDF devices, in the current technology, The 50 × 64 structure is the most advantageous in terms of device implementation. For example, 100 × 12
In the configuration of No. 8, the area of the basic matrix is quadrupled, whereas the line forming capacity is doubled, and the economic efficiency is poor. Further, the 25 × 32 configuration is too small to be suitable for constructing a large-scale three-stage link structure.

In an ordinary MDF device such as a telephone exchange, the number of subscriber lines is several tens to 50% larger than that of a switch terminal in anticipation of an increase in new subscribers. FIG.
(B) shows a three-stage link structure of 2000 terminals nominally on the assumption. For this nominal 2000 terminals, the first stage of the matrix group subscriber line side is composed of 64 basic matrix M ₁ 1 to M ₁ 64. The number of incoming lines of each basic matrix M _{1 1 to} M ₁ 64 is 5
The number of outgoing lines is 64, respectively. That is, FIG.
All the input and output lines of the basic matrix of (a) are used as valid. 2-stage matrix group is composed of 64 basic matrix M ₂ 1 to M ₂ 64. Number incoming line of each basic matrix M ₂ 1 to M ₂ 64 are respectively 64, outgoing lines number has become 48, respectively. That is, the positions of the input line side and the output line side of the basic matrix of FIG. 1A are changed. All of the incoming lines of 64 are used, and of the outgoing lines of 50, 48 are used as valid lines. The third-stage matrix group on the exchange side has 48 basic matrices M ₃ 1 to M ₃
It is composed of 48. Those basic matrices M ₃ 1 to
The M ₃ 48, the basic matrix is for each of the FIG. 1 (a), the number of incoming line of each basic matrix M ₃ 1 to M ₃ 48 are each 64. Basic matrix M ₃ 1~M ₃ 4
The number of valid outgoing lines for 8 is 48 depending on the circumstances of the exchange.
And 43 and 42 in some cases.
When the number of outgoing lines is all 48, it is applied to a switch of 2304 terminal type. In the case of the combination of 43 and 42, the number of outgoing lines is 43, and the number of outgoing lines is 4
One basic matrix of 2 forms a combination corresponding to 128 terminals and is applied to a 2048 terminal type exchange. Of course, it is possible to unify the former method by using only 2048 terminals.

FIG. 3 is a diagram showing an example of divided mounting of the three-stage link structure of FIG. 1 (b). In this divided mounting example, basic matrices M _{1 1 to} M ₁ that form the first-stage matrix group
64 are mounted on each of the eight printed wiring boards 11 to 18 separately. For example, the basic matrix M ₁ 1~M ₁
8 is mounted on the printed wiring board 11, the basic matrix M ₁ 9
To M ₁ 16 are mounted on the printed wiring board 12, and similarly, the basic matrices M ₁ 57 to M ₁ 64 are the printed wiring board 1 in the same manner.
8 is installed. Basic matrix M ₂ 1 to M ₂ 64 constituting the second stage matrix group are mounted separately eight increments in eight printed circuit boards 21-28. The basic matrix M ₂ 1 to M ₂ 8 mounted on the printed wiring board 21, the basic matrix M ₂ 9~M ₂ 16 mounted on the printed wiring board 22, and so on, the basic matrix M ₂ 57~M ₂
64 is mounted on the printed wiring board 28. Basic matrix M ₃ 1~M ₃ 48 that make up the matrix group of the third stage
Are mounted on eight printed wiring boards 31 to 38 in groups of six. For example, the base matrix M ₃ 1 to M ₃ 6 mounted on the printed wiring board 31, the basic matrix M ₃ 7~M
₃ 14 are mounted on printed circuit board 32, and so on,
Basic matrix M ₃ 43~M ₃ 48 is mounted on the printed wiring board 38.

On the subscriber side of each printed wiring board 11-18,
Eight connectors Cfi1 to Cf accommodating 50 subscribers
i8 respectively, and each basic matrix M _{1 1 to} M ₁ 6
The incoming lines of No. 4 are connected to the subscriber lines through the wirings on the printed wiring boards 11 to 18 and the connectors Cfi1 to Cfi8, respectively. Each printed wiring board 11-18
On the output side of, the basic matrix M is added to the matrix group in the second row.
_{1 1~M 1 8, M 1 9~M} 1 16, ... , or M ₁ 57,
For connecting each outgoing line of ~M ₁ 64, eight connectors Cfo1~Cfo8 are provided. For example, the printed wiring board 11, the connector CFO1, to accommodate the outgoing line to the first 8 No. of each basic matrix M ₁ 1 to M ₁ 8. In other words, it is a configuration that accommodates 64 outgoing lines. The connector Cfo2 has each basic matrix M ₁ 1
To accommodate the outgoing line of up to 9 th to 16 th of ~M ₁ 8. In other words, it is a configuration that accommodates 64 outgoing lines. Each connector Cfo3~Cfo8 a similar configuration, and has a configuration to accommodate different numbers 64 lines the outgoing line of from the basic matrix M ₁ 1~M ₁ 8. Each printed wiring board 12
The same applies to wiring of the wirings on the printed wiring boards 12 to 18, and the connectors Cfo1 provided on the printed wiring boards 12 to 18 respectively.
~ Cfo8 is a configuration for accommodating 64 outgoing lines, respectively.

Eight connectors Csi1 to Csi8 are provided on the inlet side of each printed wiring board 21 to 28, and eight connectors Cso1 to Cso8 are provided on the outlet side thereof. The wiring on each printed wiring board 21-28 is the same as the printed wiring board 11-18, but the printed wiring board 11-
The connection with 18 is such that the input side and the output side are reversed. Outgoing lines from the printed wiring boards 11 to 18 are housed in the connectors Csi1 to Csi8 via a plurality of interstage cables. For example, the connector Cfo1 of the printed wiring board 11
Is connected to the connector Csi1 on the printed wiring board 21, and the connector Cfo1 of the printed wiring board 12 is connected to Csi2 on the printed wiring board 21. The connector Cfo1 of the printed wiring board 13 is Csi3, the connector Cfo1 of the printed wiring board 14 is Csi4, and the connector C of the printed wiring board 15 is Csi4.
fo1 is Csi5, and the connector Cfo of the printed wiring board 16 is fo
1 is Csi6, the connector Cfo1 of the printed wiring board 17 is Csi7, and the connector Cfo1 of the printed wiring board 18 is Cs.
i8, respectively.

Similarly, the connectors Csi1 to Csi8 provided on the printed wiring board 22 are connected to the printed wiring boards 11 to 11, respectively.
The connectors Cfo2 mounted on the 18 are respectively connected. The connectors Csi1 to Csi8 provided on the printed wiring board 23 are connected to the connectors Cfo3 on the printed wiring boards 11 to 18, respectively.
The connectors Csi1 to Csi8 provided on the board are connected to the connectors Cfo4 on the printed wiring boards 11 to 18, respectively. Connector Cs provided on the printed wiring board 25
The connectors Cfo5 on the printed wiring boards 11 to 18 are connected to i1 to Csi8, and the connectors Cfo6 on the printed wiring boards 11 to 18 are connected to the connectors Csi1 to Csi8 provided on the printed wiring board 26, respectively. It is connected. Connector Csi1 provided on the printed wiring board 27
To Csi8 are connected to the connectors Cfo7 on the printed wiring boards 11 to 18, respectively, and the connectors Csi1 to Csi8 provided on the printed wiring board 28 are connected to the printed wiring boards 1 to Csi8, respectively.
The connectors Cfo8 on 1 to 18 are respectively connected.

As in the case of the printed wiring boards 11 to 18, the eight connectors Cso1 to Cso8 respectively mounted on the output sides of the printed wiring boards 21 to 28 are connected to the printed wiring boards 2 to 28, respectively.
It accommodates the differently numbered outgoing lines of the eight basic matrices on 1-28. Each of those connectors Cso1 to Cso8
Has a pin configuration for accommodating 50 outgoing lines, of which 48 pins are used. For example, the printed wiring board 21, the connector Cso1 to accommodate the outgoing line to the first 6 No. of each basic matrix M ₂ 1~M ₂ 8. In other words, it is a configuration for accommodating 48 outgoing lines. Connector Cso2 is, each of the basic matrix M ₂ 1~M
_It accommodates outgoing lines 7 to 12 of 28. In other words, it is a configuration for accommodating 48 outgoing lines. Each connector Cso3~Cso8 a same configuration, which is different number configured for accommodating 48 lines each correspond to the outgoing line of from the basic matrix M ₂ 1~M ₂ 8. The same applies to the wiring of the printed wiring boards 22 to 28, and the connectors Cso1 to Cso8 provided on the printed wiring boards 22 to 28 respectively accommodate the outgoing lines of 48 lines. There is. Each printed wiring board 31 to 3
Eight connectors Cti1 to Cti8 are provided on the input side of 8, and six connectors Cto1 to Cti are provided on the output side.
to6 are provided respectively. Each printed wiring board 31 to
The wiring on the printed wiring boards 11 to 18 is the same as that on the printed wiring boards 11 to 18, but a part of the wiring on each of the printed wiring boards 31 to 38 is not used. The outgoing lines from the printed wiring boards 21 to 28 are connected to the printed wiring boards 31 to 3 via a plurality of inter-stage cables.
Housed in 8 onto the connector Cti1～Cti8, further they are connected to the basic matrix M ₃ 1 to M ₃ 48 via the wiring on the printed wiring board 31 to 38.

For example, in the printed wiring board 31, the connector Cso1 on the printed wiring board 21 is connected to the connector Cti1, and the connector Cso1 on the printed wiring board 22 is connected to the connector Cti2. Further, the connector Cso1 of the printed wiring board 23 is connected to the connector Cti3, and the printed wiring board 2
The connector Cso1 of No. 4 is the connector Cti4, the connector Cso1 of the printed wiring board 25 is the connector Cti5, the connector Cso1 of the printed wiring board 26 is the connector Cti6,
The connector Cso1 of the printed wiring board 27 is the connector Cti7.
Then, the connector Cso1 of the printed wiring board 28 is connected to the connector Ct.
i8, respectively. Each outgoing line that is input to the on-board connector Cti1~Cti8 the printed wiring board 31, is distributed are connected to the incoming line of the basic matrix M ₃ 1~M ₃ 6. The other printed wiring boards 31 to 38 have the same configuration. In addition, each basic matrix M ₃ 1 to M ₃
48 lines worth or 43 or 42 lines worth outgoing lines from 48, the basic matrix M ₃ 1 to M ₃ on 48 was mounted and the printed circuit board 31 to 38 connector Cto1~Cto
It is housed in 6. For example, in the printed wiring board 31, the outgoing lines from the respective basic matrices M ₃ 1 to M ₃ 6 are accommodated in the connectors Cto 1 to Cto 6, respectively.
The output sides of the connectors Cto1 to Cto6 are connected to the terminals of the exchange through an intra-office cable. Nominal 2000
In the terminal automatic MDF device, each basic matrix M _{11
M 1 64, M 2 1~M 2} 64, M 3 1~M 3 by selecting the crosspoint of incoming line and outgoing line at 48, it is possible to connect any subscriber to the terminal of the desired exchange. Here, the automatic MD of the nominal 2000 terminals separately mounted in FIG.
The F device has the following characteristic merits (1) to (5).

(1) The required number of basic matrices constituting the first, second, and third matrix groups is a multiple of 8 or 16, and the divided mounting on the printed wiring board is rationalized. (2) Since the first-stage matrix group on the subscriber side is divided and mounted in an even number of sets, the matching with the subscriber line is improved, and the connectors Cfi1 to Cfi connected to the subscriber line are improved.
8 can be used with a common 50-pin pin connector, which facilitates connector construction. (3) By dividing and mounting the output side of the third-stage matrix group in sets of multiples of 3, the number of outgoing lines of each printed wiring board 31 to 38 becomes a multiple of 128, and the internal system cable connected to the exchange can be used. The integrity of is better. Further, if the output side of the third-stage matrix group is divided and mounted in sets of multiples of 2, the number of outgoing lines of each printed wiring board 31 to 38 becomes a multiple of 96,
After all, the compatibility with the intra-station cable connected to the exchange is improved. (4) In the inter-stage cable, the cable composed of multiples of 16 can be used as it is without branching, and the inter-stage connection work is simplified. (5) By sharing the matrix board forming the basic matrix and using the size of 50 × 64, the difference points are wasted even with respect to the basic matrix of 48 × 64 and 43 × 64 for the outgoing line and the incoming line. It is possible to secure the high utilization rate of the difference points. The merits of (1) to (5) above are evaluations for a device with a nominal 2000 terminal scale, but by applying it to a device scale below that as a series,
The repeatability is further increased and becomes effective.

FIGS. 4A and 4B are views showing a three-stage link structure of an automatic MDF device having 1000 terminals and 500 terminals. In the three-stage link structure of the nominal 1000-terminal automatic MDF device of FIG. 4A, the first stage matrix group on the subscriber line side is composed of 32 basic matrices M _{1 1 to} M ₁ 32. Each of the basic matrices M _{1 1 to} M ₁ 32 has 50 incoming lines and 6 outgoing lines.
4. That is, all the incoming and outgoing lines of the basic matrix of FIG. 1 (a) are used as valid. Two
The matrix group in the second row is 32 basic matrices M ₂ 1
˜M ₂ 32. Each basic matrix M ₂ 1
The number of incoming lines of M _{2 to} M ₂ is 64, and the number of outgoing lines is 48. That is, the positions of the input line side and the output line side of the basic matrix of FIG. 1A are changed.
Then, all 64 incoming lines are used and 5 outgoing lines are used.
Of 0, 48 lines are used as valid lines.
3-stage matrix group exchange side is composed of 24 basic matrix M ₃ 1 to M ₃ 24. To those basic matrix M ₃ 1 to M ₃ 24, the basic matrix shown in FIG. 1 (a) is for each respective base matrix M _3. 1 to
The number of incoming lines of each M ₃ 24 is 64. Effective outgoing line number of the basic matrix M ₃ 1 to M ₃ 24, as in the case of 2000 terminals, all as to be 48, 43 and 42
May be a combination of. When the number of outgoing lines is all 48, it is applied to 1152 terminal type exchanges. Four
In the case of the combination of 3 and 42, it is applied to a 1024 terminal type exchange. Each basic matrix M ₁ 1 to M ₁ 32 and between the basic matrix M ₂ 1 to M ₂ 32 is coupled by two lines, each basic matrix M ₂ 1 to M ₂ 32 and the base matrix M ₃ 1 to M ₃ 24 Two lines are also connected between the two lines in order to keep the block rate at which a desired line is not formed below a desired value.

[0017] In three-stage link structure of nominal 500 terminal automatic MDF apparatus of FIG. 4 (b), it is composed first stage matrix group subscriber line side is of 16 basic matrix M ₁ 1 to M ₁ 16 There is. Number incoming line of each basic matrix M ₁ 1 to M ₁ 16 is the outgoing line number, respectively 64 to 50, respectively. That is, all the incoming and outgoing lines of the basic matrix of FIG. 1 (a) are used as valid. The matrix group in the second row is composed of 16 basic matrices M ₂ 1 to M ₂
16. Each basic matrix M ₂ 1~M ₂
There are 64 incoming lines and 16 outgoing lines, respectively. That is, the positions of the input line side and the output line side of the basic matrix of FIG. 1A are changed. All 64 of the incoming lines are used and 48 of the 50 outgoing lines are used as valid. The third-stage matrix group on the exchange side includes 12 basic matrices M ₃
1 to M ₃ 12. To those basic matrix M ₃ 1~M ₃ 12, the basic matrix is for each of the FIG. 1 (a), the number of incoming line of each basic matrix M ₃ 1 to M ₃ 12 are each 64. Basic matrix M ₃ 1
As in the case of 2000 terminals, there are cases where the number of effective outgoing lines for M _{3 to} 12 is all 48 and combinations of 43 and 42. 57 if all outgoing lines are 48
It is applied to a 6-terminal type exchange. The combination of 43 and 42 is applied to a 512 terminal type exchange. Each of the basic matrix M and each basic matrix M ₁ 1~M ₁ 16
During ₂ 1 to M ₂ 16 are coupled by four lines, each basic matrix M ₂ 1 to M ₂ 16 and each of the basic matrix M ₃ 1 to M ₃
Four lines are also connected to each of the 12 lines, in order to keep the block rate below a desired value. FIG. 4 (a),
Even if the automatic MDF device of (b) is mounted separately, the nominal 2
The advantages (1) to (5) of the 000-terminal automatic MDF device are succeeded and the device can be made excellent.

FIGS. 5A and 5B are views showing a three-stage link structure of an automatic MDF device having 250 terminals and 120 terminals. The three-stage link structure of nominal 250 terminal automatic MDF apparatus of FIG. 5 (a), 1-stage matrix group subscriber line side is configured of eight basic matrix M ₁ 1 to M ₁ 8. Number incoming line of each basic matrix M ₁ 1 to M ₁ 8 are 50, respectively, outgoing line number is respectively 64. That is, all the incoming and outgoing lines of the basic matrix of FIG. 1 (a) are used as valid. The matrix group in the second row is composed of eight basic matrices M ₂ 1 to M ₂ 8
It is composed of Number incoming line of each basic matrix M ₂ 1 to M ₂ 8 are each 64, each outgoing line number 4
It is 8. That is, the positions of the input line side and the output line side of the basic matrix of FIG. 1A are changed. Then, using all 64 incoming lines and 50 out of 50 outgoing lines, 4
Eight lines are used as effective ones. 3 on the exchange side
The matrix group in the tier is six basic matrices M ₃₁ to
It is composed of M ₃ 6. Those basic matrix M ₃ 1
The ~M ₃ 6, the base matrix is a respective FIG. 1 (a), the number of incoming line of each basic matrix M ₃ 1 to M ₃ 6 are each 64. Effective outgoing line number of the basic matrix M ₃ 1 to M ₃ 6, as in the case of 2000 terminals, all as to be 48, it may become a combination of 43 and 42. When the number of outgoing lines is all 48, it applies to a 288 terminal type exchange. In the case of the combination of 43 and 42, 2
It is applied to a 56-terminal type exchange. Each basic matrix M ₁ 1 to M ₁ 8 and between each basic matrix M ₂ 1 to M ₂ 8 are coupled by eight lines, each basic matrix M ₂ 1 to M ₂
8 and between the base matrix M ₃ 1 to M ₃ 6 is also coupled by eight lines, but this is for the blocking probability below a desired value.

In the three-stage link structure of the nominal 120-terminal automatic MDF device of FIG. 5B, the matrix group of the first stage on the subscriber line side is composed of four basic matrices M _{1 1 to} M ₁ 4. There is. Number incoming line of each basic matrix M ₁ 1 to M ₁ 4 is 50, respectively, outgoing line number is respectively 64. That is, all the incoming and outgoing lines of the basic matrix of FIG. 1 (a) are used as valid. The matrix group in the second row is composed of four basic matrices M ₂ 1 to M ₂ 4
It is composed of Number incoming line of each basic matrix M ₂ 1 to M ₂ 4 are each 64, each outgoing line number 4
It is 8. That is, the positions of the input line side and the output line side of the basic matrix of FIG. 1A are changed. Then, all 64 of the incoming lines are used and 48 of the 50 outgoing lines are used.
You are using the line as valid. The third-stage matrix group on the exchange side has three basic matrices M _{31 to} M.
It is composed of ₃ 3. Those basic matrices M ₃ 1 to
The M ₃ 3, basic matrix are for each of the FIG. 1 (a), the number of incoming line of each basic matrix M ₃ 1 to M ₃ 3 are each 64. The number of effective output lines of the basic matrixes M 31 to M _{3 3} is all 4 as in the case of 2000 terminals.
There are cases where it becomes 8 and combinations of 43 and 42. When the number of outgoing lines is all 48, it applies to a 144-terminal type exchange. In the case of the combination of 43 and 42, 1
It is applied to 28-terminal type exchanges. Each basic matrix M ₁ 1 to M ₁ 4 and each of the basic matrix M ₂ 1 to M ₂ 4 between the joined portions 16 lines, each basic matrix M ₂ 1 to M
₂ 4 and is also coupled by 16 lines between each basic matrix M ₃ 1 to M 3 _3, which is for the blocking probability below a desired value. Even when the automatic MDF device shown in FIGS. 5A and 5B is mounted separately, an automatic MD having a nominal 2000 terminals
The advantages (1) to (5) of the F device are succeeded, and the device is excellent.

[0020] In 3 Danri link structure of the nominal 2000 terminal of FIG. 1 (b), each basic matrix M ₁ 1~M ₁ 64, M
_{2 1~M 2 64, M 3 1~M} 3 by selecting the crosspoint of incoming line and outgoing line at 48, to form a communication line connecting any subscriber to the terminal of the desired exchange. Here, when the usage rate of the difference points in the basic matrix is 90%, the block rate is 10 ^{−6, which} is a sufficiently low value. Nominal 1000 terminals, 50 shown in FIGS. 4 (a), (b) and 5 (a), (b).
The same operation is performed in the three-stage link structure of 0 terminal, 250 terminal, and 120 terminal to form a line, but the usage rate of the difference points in the basic matrix is 90%, and the block rate is sufficiently low as 10 ^-6. Becomes As described above, in this embodiment, the basic matrix is set to 50 × 64 to form the three-stage link structure,
The number of basic matrices in each stage is set to 4: 4: 3. Therefore, the three-stage link structure is commonly used in the following (i)-
It has the advantage of (v).

(I) The required number of basic matrices in each stage is a multiple of 8 or 16, and the divided mounting on the printed wiring board is rationalized. (Ii) If the first-stage matrix group on the subscriber side is divided and mounted with an even number of sets, the compatibility with the subscriber line is improved,
The connectors Cfi1 to Cfi8 connected to the subscriber line can be used as common 50-line pin connectors, which facilitates connector construction. (Iii) By dividing and mounting the output side of the matrix group of the third row in sets of multiples of 3, the number of outgoing lines of the printed wiring board on which it is mounted becomes a multiple of 128, and the internal system cable connected to the exchange is The consistency of is improved. Further, when the output side of the matrix group of the third stage is divided and mounted in sets of multiples of 2, the number of output lines becomes a multiple of 96, and again, the compatibility with the intra-office cable connected to the exchange is improved. (Iv) In the interstage cable, the cable composed of multiples of 16 can be used as it is without branching, and the interstage connection work can be simplified. (V) By making the matrix board forming the basic matrix common and using a size of 50 × 64, waste of difference points is small and high utilization rate of difference points can be secured.

On the other hand, considering the series three-stage link structure in which the size of the basic matrix is common, the following advantages (vi) to (viii) can be further considered. (Vi) Since the basic matrix size is the same regardless of the terminal scale, it is possible to reduce the types of matrix boards and improve mass productivity. Furthermore, the types of printed wiring boards and connectors can be reduced. (Vii) Even if equipment is installed according to each scale, maintenance parts can be shared and their operation can be managed by common rules. (viii) The control software that operates the automatic MDF device can also take the form of the basic structure and the extended structure, and the development and maintenance can be facilitated. The present invention is not limited to the above embodiment, and various modifications can be made. For example, if the basic matrix size is 50 × 6
However, when a small-scale three-stage link structure having 500 terminals or less is made into a series, for example, a basic matrix of size 25 × 32 may be used. Also in this case, the same advantages as those of the above embodiment can be obtained.

[0023]

As described in detail above, according to the first aspect of the present invention, a plurality of basic matrixes for forming lines, which form the matrix group of each stage of the three-stage link structure, are the number of incoming lines × the number of outgoing lines. Alternatively, the number of outgoing lines × the number of incoming lines is formed in a matrix of 50 × 64 or 25 × 32, so that the matching with the subscriber line and the intra-office cable on both sides of the three-stage link structure is improved. The size of the basic matrix can be applied to automatic MDF devices of various scales. With this basic matrix, if a series of three-stage link structures of a plurality of scales are constructed in series, the basic matrix size can be changed regardless of the terminal scale. In the same way, the types of matrix boards, printed wiring boards, connectors, etc. are reduced, mass production effects are obtained, and the device can be brought to a reasonable price. In addition, the development and maintenance of control software that operates the automatic MDF device becomes easy. According to the second invention, since the number of basic matrices of the matrix group of each stage in the first invention is configured in a ratio of 4: 4: 3, the connection between the respective basic matrices becomes easy, and the construction work The cost can be reduced and the period can be shortened.

[Brief description of drawings]

FIG. 1 is a 2000-terminal automatic MD showing an embodiment of the present invention.
It is a figure explaining the 3 step link structure of F device.

FIG. 2 is a diagram illustrating a link structure of a conventional automatic MDF device.

FIG. 3 is a diagram showing an example of divided mounting of the three-stage link structure of FIG.

FIG. 4 is a diagram showing a three-stage link structure of an automatic MDF device having 1000 terminals and 500 terminals.

FIG. 5 is a diagram showing a three-stage link structure of an automatic MDF device having 250 terminals and 120 terminals.

[Explanation of symbols]

M _{1 1} to M ₁ 64, M _{2 1} to M ₂ 64, M _{3 1} to M ₃ 4
8 basic matrix

Front Page Continuation (72) Inventor Hirohisa Akita 1-1-6 Uchisaiwaicho, Chiyoda-ku, Tokyo Nihon Telegraph and Telephone Corporation

Claims (2)

[Claims] 1. A three-stage matrix group for line formation is provided,
3 of an automatic main wiring board device for forming a line between an arbitrary subscriber line and a desired terminal of an exchange by selecting a difference point in each matrix
In the multi-stage link structure, apart from the test paths added by the required amount, the basic matrix for forming a plurality of lines that constitutes the matrix group of each stage is the number of incoming lines × the number of outgoing lines or the number of outgoing lines × the number of incoming lines. Is 5
A three-stage link structure for an automatic main wiring board device, characterized by being formed by a matrix of 0x64 or 25x32. 2. The number of the basic matrices forming each of the subscriber-side first-stage matrix group, the second-stage matrix group, and the exchange-side third-stage matrix group in the three-stage matrix group is four: The three-stage link structure of the automatic main wiring board device according to claim 1, wherein the three-stage link structure is configured in a ratio of 4: 3.