JP2772009B2 - Switch control device - Google Patents

Description

Description: Object of the Invention (Industrial application field) The present invention relates to a switch control device for a switch circuit provided in an exchange and forming a path between an incoming line and an outgoing line.

(Prior art) A switch circuit provided in an exchange plays an important role in forming a path between communication lines such as extension telephones and office lines, and between a tone generation source and a PB signal receiving device. The connection / disconnection of the path is controlled according to a request from an extension telephone or an office line (trunk circuit). A switch control device that controls the operation of this type of switch circuit, when the switch circuit is configured by an analog switch, responds to a path control request from the incoming line side by using the type of path control (path control as a call, Irrespective of various tone controls, PB signal transmission, etc.), the path control is performed after confirming whether or not the partner resource to be subjected to the path control is free.

On the other hand, in an exchange in which the switch circuit is composed of digital switches, if the path control request is tone control, a single tone generation source can be connected to multiple speech lines at the same time. The path control can be performed without confirming whether the (tone generating source) is empty. However, if the request for path control is path control as a call, as in the case of an exchange using an analog switch, it is determined whether or not the communication line on the outgoing line side to be controlled is free. After the confirmation, the path control needs to be performed. Therefore, it is necessary to change the control mode according to the type of the path control request, and there is a problem that the processing efficiency is low.

In addition, for example, path connection control is performed between two communication lines, then the connection between the communication line and the tone generation source is switched by holding the call or the like, and then the path as a call is released again by releasing the hold. Even when making a connection,
It is necessary to perform path control again after confirming whether or not the communication line of the connection destination is vacant, and there is a problem that the processing efficiency is extremely low.

Therefore, it has been considered to prepare a plurality of switch circuits for path control, tone control, and the like, for example, according to the type of path control, and to control each of these switch circuits independently. If such a configuration is adopted,
Since it is not necessary to confirm again whether or not the connection destination line is vacant in the case of the hold release or the like, the processing efficiency can be improved.

However, the overall structure of the exchange is complicated, and the cost is increased by the increase in the number of switch circuits, which is uneconomical.

(Problems to be Solved by the Invention) As described above, in the conventional exchange, when a path between the incoming line side and the outgoing line side is formed using one switch circuit,
It is necessary to perform the same control processing irrespective of the content (type) of the requested path control, and there is a problem that the processing efficiency is extremely poor. In addition, preparing a plurality of switch circuits in accordance with the type of path control has a problem that the overall structure is complicated and the cost is extremely disadvantageous.

The present invention has been made in view of such circumstances,
The purpose of the present invention is to provide a switch control device capable of performing a plurality of types of path control quickly and efficiently by effectively using a single switch circuit without causing the entire configuration of the switch to become complicated. To provide.

[Constitution of the Invention] (Means for Solving the Problems) The present invention relates to a switch control device provided in an exchange for controlling the operation of a switch circuit forming a path between an incoming line and an outgoing line. A first virtual switch for controlling a path for transmitting a PB signal, a second virtual switch for controlling a path for transmitting a tone signal, and a third virtual switch for controlling a path for a call.
Virtual switches are set on a memory, for example, and these virtual switches are logically set in response to a path control request. The path information logically set in each of these virtual switches and the virtual switch An actual path on the switch circuit is realized according to path information obtained by performing a logical operation on the basis of a priority set in advance.

(Operation) According to the present invention, paths according to path control requests are independently formed on the first, second, and third virtual switches provided according to the type of path control. A path to be set on an actual switch circuit is obtained by performing a logical operation based on the information on the paths formed on these virtual switches and a priority set in advance between the virtual switches. An actual path on the switch circuit is formed and controlled according to the information. Therefore, regardless of the type of the path control request, it is possible to effectively execute a plurality of types of path control by effectively using only a single switch circuit. Moreover, according to the type of the path control,
The path to be actually formed on the switch circuit can be automatically and logically obtained simply by changing and controlling the path of the virtual switch involved in this, and the processing efficiency is very good. Therefore, even if the call path is connected, the call line is put on hold, and then the call path connection is made again by releasing the hold, the path information for the call and the path for transmitting the tone signal are obtained. Since the information is held in the corresponding virtual switches, the switching connection control can be performed quickly.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram schematically showing the processing functions of a switch control device according to the present invention. The switch control device is provided corresponding to a digital switch circuit for forming a path between an incoming line and an outgoing line of the exchange, and controls a path connection in the switch circuit in accordance with a path control request. .

Thus, the switch control device is means A for setting, for example, a virtual switch corresponding to the type of path control on a memory in accordance with various call setting sequences (path connection requests) in the exchange, and is set in these virtual switches. Logic processing unit B for performing logical operation on the path information thus obtained to obtain information of a path to be actually formed on a single switch circuit, and setting of a path in the switch circuit according to the path information obtained by the logic processing unit B And a switch setting unit C that performs the following.

That is, as shown in FIG. 2 (a), the switch circuit 1 in the exchange has a plurality of extension terminals 2a,
2n are connected to the incoming and outgoing sides thereof, and a plurality of office lines 3a, 3m are connected to the incoming and outgoing sides via the office trunk circuits 4a, 4m. Tone source
5a to 5p are connected to the incoming line, and a plurality of PB signal receivers 6a to 6k are connected to the outgoing line. Here, a trunk circuit 4 for connecting the extension terminals 2a, 2n and the office lines 3a, 3m connected to the input side and the output side of the switch circuit 1, respectively.
Although a and 44 m are the same, they are functionally divided into an incoming line side and an outgoing line side, respectively. The switch circuit 1 receives the various path control requests given from the extension terminals 2a to 2n and the office lines 3a to 3m via the trunk circuits 4a to 4m, and switches between the incoming line and the outgoing line. A path is formed, and a communication path for a communication line is set.

In contrast to such a switch circuit 1, the switch control device according to the present embodiment includes a plurality of virtual switches according to the type of path control, for example, as shown in FIG. These virtual switches are assumed to be a PB control virtual switch 1a, a tone control virtual switch 1b for tone signal path control, and a call control virtual switch 1c for path control as a call, respectively.
A logical path is set on 1a, 1b, 1c.
These virtual switches 1a, 1b, 1c are realized on a memory, for example, and a logical path is set on this memory by setting a flag according to a path formation position. The path information set on each of the virtual switches 1a, 1b, and 1c is logically operated according to a predetermined rule, and the path information actually set on the switch circuit 1 is obtained. .

Note that the rules regarding the logical operation of the path information respectively set in the virtual switches 1a, 1b, 1c are basically such that the priority of the effective connection designation for the PB control virtual switch 1a is the highest, and then the tone control virtual switch 1b , And the priorities of the effective connection designation and the call control virtual switch 1c. Then, according to the priority, the information of the path set in each of the virtual switches 1a, 1b, 1c is logically operated.

FIG. 3 illustrates the operation of the switch control device that controls the path formation of the switch circuit 1 assuming such virtual switches 1a, 1b, and 1c for a call between two extension terminals X and Y. The path control will be described below.

First, symbols in a logical operation for a path connection request are defined as follows.

 A = B; A and B are connected to each other.

Here, A and B indicate resources (extension terminal, trunk circuit, PB signal receiver R, tone generation source S, etc.) connected to the incoming and outgoing lines of the switch circuit 1, A = O, A = A Indicates an invalid connection (initial state, disconnection instruction). [A = B] c; A and B are connected as a call.

 [A = B] t; A and B are connected as terminals.

 [A = B] p; A and B are connected as PB signal transmission.

[] A + [] b; request both connection a and connection b. (A, b = c, t, p) In the state where the extension terminals X and Y are not doing anything, since no path connection request is given to the switch control device, each virtual switch 1a, 1b, 1c No special path information is set. As a result, each virtual switch 1a, 1b,
The information of the path that each 1c has is [X = O] p + [X = O] t + [X = O] c X
= O [Y = O] p + [Y = O] t + [Y = O] c Y
= O 2, and the path connection to the switch circuit 1 is not controlled. As a result, the switch circuit 1 maintains the state in which the outgoing lines of the extension terminals X and Y are connected to the silent tone generation source Ss as the initial state for the extension terminals X and Y.

When the extension terminal X goes off-hook, the switch control device receives a path connection request. Since this path connection request is tone control, as shown in FIG. 3 (b), a path for connecting the extension terminal X to the tone generation source St for generating the dial tone is connected to the tone control virtual switch 1c by [X
= S] t. As a result, each virtual switch
The information of the path set in 1a, 1b, 1c is [X = O] p + [X = S] t + [X = O] c X
= S [Y = O] p + [Y = O] t + [Y = O] c Y
= O 2, and a path is formed in the switch circuit 1 for connecting the tone generating source St for generating the dial tone on the incoming line and the extension terminal X on the outgoing line.

Subsequently, when a dial operation of the extension terminal X is performed, a PB transmission request is issued to input a PB signal generated by the dial operation to the exchange. Then, in response to this, the switch control device sets the path for connecting the extension terminal X to the PB signal receiver P to the path control PB control virtual switch 1a as shown in FIG. ] Is set as p. As a result, the information of the path set for each virtual switch 1a, 1b, 1c is [X = P] p + [X = O] t + [X = O] c X
= P [Y = O] p + [Y = O] t + [Y = O] c Y
= O 1, and a path is formed in the switch circuit 1 for connecting the incoming line side of the extension terminal X to the outgoing side PB signal receiver P.

Thereafter, when the transmission of the PB signal ends, the path is disconnected by the disappearance of the PB transmission request, and the call to the extension terminal Y specified by the PB signal is performed. This call is made in a state of receiving a path connection request from the extension terminal X and simultaneously receiving a tone control request indicating transmission of a ringing tone to the extension terminal Y. As a result, as shown in FIG. 3D, a path for connecting the extension terminal X and the extension terminal Y to the call control virtual switch 1c is set as [X = Y] c by the path connection request, and at the same time, In the tone control virtual switch 1c, a path for connecting the extension terminal X to the tone generation source St for generating a ringback tone is set as [X = S] t. In the tone control virtual switch 1c, a path for connecting the extension terminal Y to a tone generation source St for generating a ringing tone is set as [Y = S] t. And these virtual switches 1a, 1b, 1c
Is logically operated as follows in accordance with the priority described above.

[X = O] p + [X = S] t + [X = Y] c X
= S [Y = O] p + [Y = S] t + [Y = O] c Y
= S Then, according to the result of the logical operation, the switch circuit 1 has a path for connecting the tone generation source St for generating the ringback tone on the incoming line and the extension terminal X on the outgoing line,
It is formed in preference to the path connecting the incoming extension terminal X and the outgoing extension terminal Y. At the same time, a path is formed in the switch circuit 1 for connecting the tone generating source St for generating the ringing tone on the incoming line and the extension terminal Y on the outgoing line.

On the other hand, when the extension terminal Y answers the incoming call, a path connection request as a call is issued from the extension terminal Y, and the path set in the tone control virtual switch 1c is disconnected. Then, in accordance with the path connection request, FIG.
As shown in (1), a path for connecting the extension terminal X and the extension terminal Y to the call control virtual switch 1c is newly set as [Y = X] c. And these virtual switches 1a, 1b, 1c
The information of the path set in [X = O] p + [X = O] t + [X = Y] c X
= Y [Y = O] p + [Y = O] t + [Y = X] c Y
= X and the switch circuit 1 has the extension terminals X and Y
A path connecting the incoming line and the outgoing line between them, that is, a communication path, is formed.

By the way, when the extension terminal Y puts the call on hold in a state where such a communication path is formed, a request for tone connection is issued. Then, the switch control device outputs a hold tone to the extension terminal X on the tone control virtual switch 1b as shown in FIG. 3 (f) without disconnecting the path set in the above-described call control virtual switch 1c. A path for outputting a silent tone to the extension terminal Y (initial state) is set. As a result, the information of the path set in the virtual switches 1a, 1b, 1c is [X = O] p + [X = S] t + [X = Y] c X
= S [Y = O] p + [Y = S] t + [Y = X] c Y
= S, and the switch circuit 1 has the extension terminals X and Y
A path for connecting the outgoing line side of each to a tone generation source St for generating a hold tone and a path for connecting to a tone generation source Ss in a silent state are formed. As a result, extension terminals X and Y
A new path connection is formed in the switch circuit 1 without losing information on a path that forms a communication path between them.

When the extension terminal Y whose hold is set as described above is released from the hold, the request for the tone connection is canceled accordingly. As a result, a path for outputting a hold tone to the extension terminal X set on the tone control virtual switch 1b and a path for outputting a silent tone to the extension terminal Y (initial state) are respectively set. Disconnect. Then, in this state, the information of the path set in each virtual switch 1a, 1b, 1c is [X = O] p + [X = O] t + [X = Y] c X
= Y [Y = O] p + [Y = O] t + [Y = X] c Y
= X 1, and a path for interconnecting the incoming line and the outgoing line between the extension terminals X and Y is formed on the switch circuit 1 again.

As described above, in the present switch control device, paths corresponding to the type of a given path connection request are respectively set on virtual switches assumed according to the type of path connection request, and the paths are set on these virtual switches. A logical operation is performed on the path information set in the switch circuit to obtain information on the path to be set on the switch circuit, so that only a single switch circuit is provided without providing a plurality of switch circuits corresponding to the path types on the exchange. Can be effectively used to effectively execute a plurality of types of path control. Moreover, since the actual switch path is obtained by logically calculating the path information set on each of the plurality of virtual switches, for example, even if the call is on hold, the information of the path which has already been set as the communication path can be obtained. You can keep it as is. Therefore, even when the hold is released, it is not necessary to confirm whether or not the communication line on the outgoing line side, which is the path control target, is free, as in the related art, and the path connection is efficiently performed. Becomes possible.

Therefore, it becomes possible to execute a plurality of types of path control quickly and efficiently without increasing the cost burden.

Note that the present invention is not limited to the above-described embodiment. Here, a description has been given of an example of setting a communication path between extension terminals and path control at the time of the hold operation, but the present invention is similarly applicable to various path controls in other exchanges. The number of virtual switches, the logical priority, and the like may be determined according to the use of the exchange. In short, the present invention can be variously modified and implemented without departing from the gist thereof.

[Effects of the Invention] As described above, according to the present invention, based on information on a path set on a virtual switch according to a type of a path connection request, and a priority set between virtual switches in advance. Since logical operations are performed to control the path formation on the actual switch circuit, various path connections can be efficiently executed without causing a complicated configuration of the exchange. Can be played.

[Brief description of the drawings]

FIG. 1 is a schematic functional block configuration diagram of a switch control device according to an embodiment of the present invention, FIG. 2 is a diagram showing a configuration of a switch circuit in a switchboard and a concept of a virtual switch according to the embodiment, FIG. FIG. 5 is a diagram schematically illustrating a procedure of path control in the embodiment device. 1 ... Switch circuit, 2a, ~ 2n ... Extension terminal, 3a, ~ 3m ...
... office line, 4a, ~ 4m ... trunk circuit, 5a, ~ 5p ... tone generation source, 6a, ~ 6k ... PB signal receiver, 1a ... PB control virtual switch, 1b ... tone control virtual switch 1c: Call control virtual switch 1c, A: Virtual switch setting means, B:
... Logic operation part, C ... Switch setting part.

Continuation of the front page (72) Inventor Ryuji Ito 1 Toshiba-cho, Komukai, Koyuki-ku, Kawasaki-shi, Kanagawa Prefecture (56) References JP-A-57-207498 (JP, A) (58) Investigated Field (Int.Cl. ⁶ , DB name) H04Q 3/54-3/545 H04Q 3/52-3/52 101 H04Q 11/00-11/04 305

Claims (1)

(57) [Claims] 1. A switch control device for controlling the operation of a switch circuit forming a path between an incoming line and an outgoing line of an exchange, comprising: a first virtual switch for controlling a path for transmitting a PB signal; A second virtual switch for controlling a path for transmitting a tone signal, a third virtual switch for controlling a call path, and a path control request for the first, second and third virtual switches. Virtual switch setting means for logically setting connection in accordance with the following, path information logically set in the first, second, and third virtual switches, respectively, and the first, second, and third virtual switches. Logic operation means for calculating a path to be set in the switch circuit by performing a logical operation based on a priority set in advance between the virtual switches; Switch control device being characterized in that includes a switch circuit setting means realized on the street.