JPS59196658A - Operating device for bi-direction line - Google Patents

Abstract

PURPOSE:To allow double acquisition of a line to be hardly occurred and to use the line equally by constituting the order of line selection is changed every time the number of use of lines reaches a prescribed number. CONSTITUTION:When a call is generated in exchanges la,1b, an idle line is selected for acquisition. In changing the state of line into ''Busy'', ''1'' is added to a value of ''number of use of lines'' of a central processing unit 3a or 3b, of a storage device 6a or 6b, and when the result of addition reaches a prescribed value, the selection order number corresponding to the line number is circulated and the value of the ''number of use of lines'' is restored to zero. When the number of use of lines is below the prescribed number, the line is selected by a prescribed selecting order number but when the number reaches a prescribed number, the selection order number is changed.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a bidirectional line operating device, and more particularly to a bidirectional line operating device that avoids double capture of a plurality of lines operated in both directions between opposing switching points in a telephone exchange or the like.

FIG. 1 is a block diagram showing an example of a conventional R circuit configuration of opposing exchange points, and FIG. 2 is a diagram showing an example of the contents stored in the memory shown in FIG. 1.

First, a conventional bidirectional line operating device will be described with reference to FIGS. 1 and 2. The two exchange points have an intersection
Jllll11a and 1b are arranged facing each other, and these exchanges 4fi1a and 1b are connected by a bidirectional line group 5. One exchange 1a includes a main channel device 2a, a central processing unit 3a, and a storage device 4a. Main channel device 2a
is used to switch one of the lines included in the bidirectional line group 5. The central processing unit 3a, which will be explained in detail later in FIG. 2, controls the main channel device 2a according to the contents stored in the storage device 4a. The other exchange 1b is constructed in the same manner as the exchange 11111a, and includes a main channel device 2b, a central processing unit 3b, and a storage device 1i4b.

The storage devices 4a and 4b shown in FIG. 2 show an example of the stored contents when the number of lines in the bidirectional line group 5 is N-5, and in FIG. The lines with the same number in the storage device 4a of one exchange 1a and the storage device 4b of the other exchange 1b indicate the physically same line. "Line type" is the type for determining the priority for line selection in both father switchboards 1a and lb, and for each line of bidirectional line group 5, either "WI destination" is selected in either switch la or switchboard 1b. but,
"Non-priority" is given to the other. [Line status] indicates whether the corresponding line is "in use" or "vacant", and the corresponding (-) line is The memory status is set to ``in use'' or ``free'' depending on the status of ``selection order number J''. The numbers are numbered from 1 to N.

Next, the operation of the conventional bidirectional line operating device will be described with reference to FIGS. 1 and 2. Now, when a call occurs in the exchange 1, the central processing unit 3a selects the vacancies that are displayed in order from the selection order number @1 to the larger number according to the selection order number shown in FIG. 2 stored in the storage device 4a. Select a line. At this time, if the number of lines in use is <N-1, the selection in both exchanges 1a and 1b becomes valid and the line is normally captured. Then, the central processing units 3a, 3b change the line status of the line stored in the storage devices 4a, 4b from "idle" to "in use". However, if the number of lines in use is -N-1, that is, if the number of calls obtained by adding the number of calls currently occurring to the number of reserved lines already in use exceeds the total number of lines N in line group 5, then , the exchanges 1a and 1b will simultaneously select the same line and acquire it once. When the exchanges ia and 1b detect such double capture, the second
Refer to the line type of the line shown in the diagram, and select the type of the line as "
The call from the exchange that is set as "priority" is validated, and the process proceeds in the same manner as described above. Then, since there are no more free lines on the "non-priority" exchange side, all lines are busy.

In other words, the line selection order is reversed on both opposing exchanges to reduce the possibility of double capture, and each line is...
Priority is assigned so that one side of the exchange has priority and the other side has no priority, and if double capture occurs, the capture of the priority side of the exchange is enabled. There is. However, since the selection order is fixed, the frequency of use of the lines with the lowest selection order number becomes much higher than the average frequency of use per line in group S5. First, the wear on that line was significantly greater than on other lines, causing early deterioration of line quality.

In other words, since the conventional bidirectional line operating device is configured as described above, the lines are not used evenly, and as a result, the line wear is unevenly distributed.

Therefore, the main purpose of this invention was to eliminate the above-mentioned drawbacks of the conventional technology, and by making the selection order of lines semi-fixed, double capture of lines is unlikely to occur and lines are distributed evenly. The purpose is to provide the bidirectional line operation equipment used.

To summarize this invention, at two switching points connected by a plurality of circuits operated in both directions, the number of circuits in use is counted, the circuit selection order is changed according to the counting result, and the circuit selection and acquisition is performed. This is a bidirectional line operating device configured so that both switching points perform operations in reverse order.

The above objects and other objects and features of the present invention will become more apparent from the detailed description given below with reference to the drawings.

FIGS. 3A and 3B are diagrams showing an example of changes in the storage contents of the storage devices 6a and 6b included in an embodiment of the present invention. The storage VC devices 5a and 5b shown in FIGS. 3A and 3B are the same as the conventional storage devices 4a and 4 shown in FIG.
Transfer plane 1a instead of b.

1b. And storage device 6a,
6b is the conventional storage device 4a shown in FIG.

In order to count the number of lines used in line group 5 compared to line group 4b,
A storage area for "number of lines in use" is newly provided, and other information such as line number, line type, line status, and selection order number are the same as those in the memory devices 4a and 4b shown in FIG.

Next, the specific operation of one embodiment of the present invention will be described with reference to FIGS. 1, 3A, and 3B. When a call occurs on exchange 811a or 1b, a free line is selected and captured, similar to the conventional system shown in FIG. 1 described above. However, when changing the line status to "in use", the central processing unit 3a or 3I[l! 1 is added to the value of "Number of times of use" in the storage device 6a or 6b, and when the addition result reaches a predetermined value, the selection order number corresponding to the line number is cycled through and the "Number of used lines" is added. Return the value to 0. In this way, when the number of lines in use is less than a predetermined number, lines are selected using a fixed selection order number, but when the predetermined number is reached, the selection order number is changed. the result,
Semi-fixed selection order numbering can be performed, and selection order numbers are evenly assigned to each line, so that the frequency of use of each line can be equalized.

In the above-described embodiment, the central processing unit 3a or 3b and the storage device 6a or 6b are used in combination as means for counting the number of lines in use, but the invention is not limited to this. Alternatively, a dedicated counter R may be provided in 6b without storing the number of lines in use. In addition, as a method of changing the IjI selection order according to the counting results,
Although we have shown a method of cycling the order, the method is not limited to this, and any method of changing the order that can be done evenly may be used. For example, the line selection order may be changed using a random number table common to both exchanges. may be changed.

As described above, according to the present invention, the line selection order is changed every time the number of lines in use reaches a predetermined number. Qin has a unique effect that can be used.

[Brief explanation of the drawing]

FIG. 1 is a schematic block diagram showing an example of a conventional bidirectional line operating device. FIG. 2 is a diagram showing an example of the storage contents of a storage device included in the exchange shown in FIG. 1. FIG. 3 is a diagram showing an example of the storage contents of a storage device included in an embodiment of the present invention. In the figure, ia and lb are exchanges, 2a and 2b are main channel devices, 3a and 3b are central processing units, 5 is a bidirectional line group, and 6a and 6b are storage devices. 11 Yudai 112 Atsushi 2 Figure 7 Wednesday, Comic Figure 3A Figure 3B procedural amendment (voluntary) Showa 5%i7 q"". Mr. Commissioner of the Patent Office 1, Indication of the case 'i,? 111971 71605
No. 2, the merits and benefits of the invention, both of which are self-produced, J operational features, Akebono, the representative of the person making the amendment, Hitoshi Katayama, Part 1, Agent 5, Detailed explanation of the invention in the specification subject to the amendment, 6, Contents of the amendment. (1) Correct “in the memory contents” on page 2, line 16 of the specification to “of the memory contents.” (2) r3b storage device 6 on page 7, line 7 of Mei 1111
Correct aJ to r3b is a memory bag @6a. that's all

Claims (1)

[Scope of Claims] Usage counting means for counting the number of lines in use at two exchange points connected by a reinstatement line operated in both directions; and means for carrying out selection and acquisition of circuits in reverse order with respect to said order by both switching points.