JPH0113351Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a switching device for switching signal paths (lines), and is a device with a fixed distance between terminals such as a U-shaped plug or SJ cable (Solid Jacket) (hereinafter referred to as Abbreviated as U plug). The present invention relates to a switching device in which switching input/output terminals are arranged so that a plurality of signal lines can be manually operated in various switching units using a switching device.

In order to improve the reliability of the communication system, satellite communication earth stations and the like usually have a backup line to back up the working line. In this case, the number of protection lines to be provided relative to the number of working lines varies depending on the importance of the system or the reliability of the equipment used. There are two ways to switch between the working line and the protection line, either automatically or manually.The present invention is an improvement on a manual switching device. There are various devices used, but this article concerns a switching device that directly connects and disconnects coaxial lines.

FIG. 1 shows a circuit diagram of the switching device. Figure 1 shows
This shows a case where there are N lines including working lines and protection lines. In the figure, 1in, 2in,..., (M-
1) in, Min,..., Nin (NM) indicate the input terminals of each line, and A, B,..., D, H,..., G indicate the output terminals. 1a, 2a,..., (M-
1) a, Ma, ..., Na indicate the switching output terminals of each line for line switching, and 1b, 2b, ..., (M-
1) b, Mb, and Nb indicate switching input terminals for each line. The suffix a indicates a switching output terminal close to the input terminal side, and the suffix b indicates a switching input terminal close to the output terminal side. Also,
U ₁ , U ₂ , ..., U _(M-1) , U _M , ..., U _N indicate U plugs.

Figure 2 shows conventional switching input/output terminals 1a, 1b,
2a, 2b, . . . , Na, and Nb are shown in FIG. U ₁ , U ₂ , . . . , _UN in FIG. 2 are U plugs, and the state shown in FIG. Normally, signals of the same type and performance are switched, and considering component compatibility, U plugs U ₁ , U ₂ , ..., U _N are of the same type and performance.
It is common to use ones with the same shape. In FIG. 1, N lines are currently connected from input to output. At this time, the switching input/output terminals 1a, 1b, . . . , Na, _Nb shown in FIG. 2 are arranged in an orderly manner, and the U plugs U ₁ . Now, next, input terminals 1in, 2in.
The signal input from in is in the working/standby relationship, and if you try to output the signal input from input terminal 2in to output terminal A, connect the U plug that should connect switching output terminal 2a and switching input terminal 1b. There is a need to. However, in the conventional input/output terminal position shown in Figure 2, the U plugs of U ₁ and U ₂ cannot be used because the dimensions between the terminals are different, and U plugs or cables of different dimensions must be used. It is rather inconvenient.

In the above case, signal lines 1 and 2 are switched symmetrically, but if there are N lines, many combinations of switching methods can be considered, and if the number of lines N is small, the same U
A switching method using a plug is easily considered. For example, if the number of lines N is two, that is, only the top two lines in Figures 1 and 2 are switched, as shown in Figure 3, between each output terminal and input terminals 1a1b, 1b2a, 2
It is easily understood that the distance between a2b should be kept constant.

However, as the number of lines N increases, there are various combinations of switching, and it is not easy to position and install the switching input/output terminals so that all of these switching can be performed using only U plugs of the same size. .

The present invention is designed so that even if the number of lines N is large, switching of various combinations can be handled using only U plugs of the same size.
The purpose of this invention is to provide a switching device in which Nb is arranged.

In order to achieve the above object, the switching device of the present application provides one switching input/output terminal Na at an arbitrary position for various combinations of various switching units when the number of lines N is three or more. A switching input/output terminal Nb to be paired with the switching input/output terminal Na is provided at any position on the circumference of a circle with the switching input/output terminal Na as the center and the radius r as the distance between the terminals of the U plug, etc. Also, when the value obtained by dividing the central angle of the circle by the number of lines N is α (α = 2π/N radians), the line segment connecting the switching input/output terminals Na and Nb is Mbα (M =
1, 2,...,N) The switching input/output terminals Mb are provided on the shifted circumferences, and the input terminals 1b,
2b..., (M-1)b, Mb,..., Nb are provided on the circumference, and switching input/output terminal Mb and (M-1)
A switching input/output terminal Ma is provided at a position apart from the position b by the distance r between the terminals of the U plug, etc., and is not at the position of the switching input/output terminal Na, and further, other switching input/output terminals are provided. are sequentially provided in the same manner.

Hereinafter, the present invention will be explained based on embodiments shown in the drawings.

FIG. 4 is a diagram showing the arrangement of switching input/output terminals of the switching device of the present invention. In the drawing, first one switching input/output terminal Na is provided at an arbitrary position, and the switching output terminal Na is placed at an arbitrary position on the circumference of a circle whose radius is the distance r between the terminals of the U plug. Switching input terminal paired with switching output terminal Na
When Nb is provided and the value obtained by dividing the central angle of the circle by the number of lines N is α (α = 2π/N radians),
Input terminal 1b is provided at a position shifted by α from the line segment connecting switching input/output terminals Na and Nb, and input terminal 2b is provided at a position further shifted by α. In this way,
Sequential input terminals 1b, 2b..., (M-1)b, Mb,
..., Nb is provided on the circumference. Then, the switching output terminal 1a is placed at a position away from the position of the switching input terminals Nb and 1b by the distance r between the terminals of the U plug and not at the position of the switching output terminal Na.
will be established. Generally, input terminal (M-1) b and
An output terminal Ma is provided at a position away from the position of Mb by the distance r between the U plug terminals and not at the position of the output terminal Na. In this way, output terminal 1
A to (N-1)a are provided, and all input/output switching terminals 1a, 1b, . . . , Ma, Mb . . . , Na, and Nb are provided.

Due to the arrangement of the input/output switching terminals provided in this way, it is possible to switch signals using a U plug of the same size for various switching under the following conditions.

(Condition 1) N3 (Condition 2) When the switching unit of working lines and protection lines is expressed as A:B (A is the number of working lines and B is the number of protection lines) in the number of lines N, then A
N, A+BN We are dealing with the case where B=1 or 0.

B=1 means, for example, that when there are 8 lines, it is not assumed that there are 2 protection lines with the same conditions for 6:2, that is, 6 working lines. Also, B = 0 means that there is no protection line and only a working line, so when there are 8 lines, there is a switching unit of 6:1 and 1 working line, (6:1) + (1:0)
It was used to express a unified expression.

(Condition 3) When there is already a switching unit (A2) of A:1 in the number of lines N, the remaining switching units are C:B (C=1, B=1 or 0).

Next, a case will be described in which this switching device is used for switching eight lines.

Table 1 (1) (1:0)+(1:0)+(1:0) +(1:0)+(1:0)+(1:0) +(1:0)+(1 :0) (2) (1:1)+(1:0)+(1:0) +(1:0)+(1:0)+(1:0) +(1:0) (3) (1:1)+(1:1)+(1:0)+(1:0)+(1:0)+(1:0) (4)(1:1)+(1:1)+ (1:1) +(1:0)+(1:0) (5) (1:1)+(1:1)+(1:1) +(1:1) (6) (2:1 ) + (1:0) + (1:0) + (1:0) + (1:0) + (1:0) (7) (2:1) + (1:1) + (1:0 ) +(1:0)+(1:0) (8) (2:1)+(1:1)+(1:1) +(1:0) (9) (2:1)+(2 :1)+(1:0)+(1:0)(10)(2:1)+(2:1)+(1:1)(11)(3:1)+(1:0)+ (1:0) +(1:0)+(1:0) (12) (3:1)+(1:1)+(1:0) +(1:0) (13) (3:1 ) + (1:1) + (1:1) (14) (3:1) + (2:1) + (1:0) (15) (4:1) + (1:0) + (1 :0) +(1:0) (16) (4:1)+(1:1)+(1:0) (17) (4:1)+(2:1) (18) (5:1 )＋(1:0)＋(1:0) (19) (5:1)＋(1:1) (20) (6:1)＋(1:0) (21) (7:1) Table 1 lists all the combinations of switching units that satisfy the above (condition 2) when N=8.

In (1), all eight lines are in a state without backup. Among switching methods that have protection lines, 7:1 switching in (21) is the switching unit used when the working line has the highest reliability, and 1:1 switching in (5) applies to all working lines. A case is shown in which the line is used for important lines with all protection lines attached. Now, in Table 1, (9),
(10), (14), and (17) apply to the above (condition 3), so
This is a combination of switching units that cannot be handled by the switching device of the present invention.

FIG. 5A to FIG. 5Q show the circuit diagram and the arrangement of the U plug together with the symbols in Table 1.
indicates a circuit diagram, and indicates an implementation diagram. This will be explained below with reference to FIGS. 5A to 5Q.

1 shown in FIG. 5A does not have any spares. Therefore,
Eight U plugs are used.

2 shown in Figure 5B is 6 lines without backup, 1
The case where the switching unit is 1 working and 1 spare is shown. 2 shows a case where the eighth line is used as a protection line, the seventh line is used as its working line, and the protection line 7 is used as an output signal. In case 2, the number of working lines is seven, so there is no constant output from the output terminals opposite to the input lines designated as backup. That is, the output of G can be output by switching between the signal from 7a and the signal from 8a. Now, when the eighth line is used as a protection line, the working line may be the seventh line as shown in the figure, but it is possible to provide protection for the first to sixth lines, that is, all the working lines. If the first line is used as a protection line, the working line that can be backed up by the first line is the eighth line, and if the second line is used as a protection line, it is the first line that can be backed up. Similarly, various combinations are possible among these switching units, and Figure 2 shows only one example of the combinations of switching units.

Similarly, FIGS. 5C to 5Q only show one example of the state of each combination of switching units.

3 shown in Figure 5C has a total of 6 lines in use,
It is shown that two of the lines have backup lines. As for which line can be used as a backup line, if the 8th line is used as one of the backup lines and the other lines are used as other backup lines, it is possible to back up the same line as in 2 above, but the two Since there is a backup line, continuous lines (for example, the 4th line and the 5th line), except the 7th line that is adjacent to the 8th line,
Any line can be used as a protection line unless a line (line) is used as a protection line.

Similarly, switching examples other than those shown in Figures 4 to 21 shown in Figures 5D to 5Q can be described, but since the concept is the same, 5 and 2 will be described below.
Only case 1 will be explained.

5 shown in FIG. 5E has a configuration in which there are four active lines, and each active line has a backup line. In the case of the figure,
The even-numbered lines are used as protection lines, and the odd-numbered lines with the next lower number are used as working lines. If this pair of working line and protection line is expressed as working/protection, it can be expressed as 1/2, 3/4, 5/6, and 7/8. As combinations other than those shown in this figure, 2/3, 4/5, 6/7, and 1/8 pairs are also possible. In addition, since the current and standby ratios are equal in this case at a ratio of 1:1, combinations in which the active and standby positions are reversed by an arbitrary number are also possible.

21 shown in FIG. 5Q has 7 lines in active use and 1 line in reserve. The figure shows a state in which the first line has been switched to a protection line. Since the switching output terminals 1b, 2b, . . . , 8b are on the same circumference, the eighth line can back up any of the working lines.

Figures 6A to 6D show the switching input/output terminals arranged according to the present invention and the U plug arrangement state when there is no protection line, and the number of lines N is 3, 4, 5, and 6.
The case of a line is shown. As long as the physical relationship between the size of the switching input/output terminal and the length of the circumference is satisfied, the switching device of the present invention can be applied no matter how many lines there are.

In addition, in the above explanation, the case where the number of protection lines is one for each number of working lines (for example, 7:1) was described, but conversely, the number of protection lines for one number of working lines is multiple (for example, 1:1). The same applies to case 7). In Fig. 1, even if the signal is passed in the direction 1 → A, it is reversed from I → 1.
This is because it can be treated as being exactly the same on the transmission path even if it passes in the direction of .

As described above, according to the present invention, even if the number of lines increases, switching can be performed using only a U-plug of the same size, and the switching can be easily performed using a simple device.

[Brief explanation of the drawing]

Figure 1 is a circuit diagram of the switching device, Figure 2 is a layout diagram of switching input/output terminals and U plugs in a conventional example, Figure 3 is a layout diagram of switching input/output terminals in the case of two lines, and Figure 4. is an explanatory diagram showing the arrangement relationship of switching input/output terminals according to the present invention, and FIGS. 5A to 5Q are 8
Circuit diagrams and arrangement diagrams of switching input/output terminals explaining various switching and various combination states in the case of lines, Figures 6A to 6D are switching input/outputs when the number of lines is 3 to 6. FIG. 3 is a diagram showing an example of arrangement of terminals. 1in, 2in,..., Nin: Input terminal of each line,
A, B,..., G: Output terminal of each line, 1a, 1
b, 2a, 2b,..., Na, Nb: switching input/output terminal, U ₁ , U ₂ ,..., U _N : U plug, etc.

Claims (1)

[Scope of utility model registration request] When the number of lines N is 3 or more, one switching input/output terminal Na is provided at any position for various combinations of various switching units, and the U plug Switching input/output terminal paired with switching input/output terminal Na at any position on the circumference of a circle whose radius is the terminal-to-terminal dimension r.
When Nb is provided and the value obtained by dividing the central angle of the circle by the number of lines N is α (α = 2π/N radians),
Mba from the line segment connecting input/output terminals Na and Nb for switching
(M=1, 2,...,N) The switching input/output terminals Mb are provided on the shifted circumferences, and the input terminals 1b, 2b..., (M-1)b, Mb,..., Nb are sequentially connected to the circle. Provided on the circumference, and switching input/output terminals Mb and (M
-1) The switching input/output terminal is located at a distance from the position b by the distance r between the terminals of the U plug, etc.
A switching device characterized in that a switching input/output terminal Ma is provided at a position other than the Na position, and further, other switching input/output terminals are sequentially provided in the same manner.