JPS60117953A - Automatic catching device for specific circuit - Google Patents

Abstract

PURPOSE:To attain the effective use of a specific circuit by transmitting automatically a signal to catch a specific circuit in response to reception of the information showing an idle state of the specific circuit from a private branch exchange. CONSTITUTION:A circuit monitor circuit 36 works after the transmission of pulses is through with a dial pulse generator 35 and monitors the circuit state. Then the circuit 36 detects for a prescribed period of time the presence or absence of a proper component, e.g., the 400Hz component of a busy tone sent from an exchange 31 in case the circuit to be connected is busy. Thus a busy state is decided when the 400Hz component exists, and a DC loop forming circuit of the generator 35 is released to reset the operation to the starting state. While it is decided that a circuit is caught when the detection is impossible for the 400Hz component even though the circuit is monitored for a prescribed period. Then a report signal generating circuit 37 is actuated to inform the user through a speaker 38 connected to the circuit 37 that a desired circuit is caught.

Description

[Detailed description of the invention] The present invention relates to a specific line automatic acquisition device.

Generally, business establishments with several hundred employees are equipped with automatic exchanges for private telephones, so that telephone calls can be made by dialing each other's extension numbers. In addition, if there is another business office of the same company several tens of kilometers away and there is a considerable amount of communication between the business offices, it is possible to establish a dedicated line between the business offices and communicate without using general public communication lines. Communication costs can be lower by configuring a network.

In this case, if you dial "0" on the extension telephone, you will be connected to an outside line (public communication line), for example, "0".
If you dial 6, the exchange will connect you to the dedicated line connecting the offices.

Then, if you continue to dial the extension number at the other party's office, the dedicated line connection extends to the exchange at the other party's office, and the call to the person you want to talk to begins.

A conventional system of this type will be schematically explained with reference to FIG.

In the case of a step-by-step exchange with a four-digit extension number, when a caller 11 in the premises of office A 1 picks up the handset, the line switch 12 automatically rotates to select an available primary selector 15. , when the calling subscriber dials the first digit, the negative selector 15 rotates upward to select an empty secondary selector 17, and when the calling subscriber dials the second and third digits, the secondary selector 17 and the connector 18 is rotated upward and connected to the incoming subscriber telephone ta13.

When you want to use the leased line 19 to make a call to the subscriber 21 of office B 2, the calling subscriber 11 will be assigned the first When the number "6" is dialed, the connection is connected to level 6 of the -next selector 15, and the connection is extended to the B office 2 via the repeater 16. After that, when the three-digit number corresponding to the extension number in office B 2 is dialed, the incoming selector 23, secondary selector 25, and connector 26 are rotated upward in order, and the connection is made to the telephone 21 of the called subscriber. Ru.

Note that 14.22 is a line switch, and 24 is a primary selector.

Now, to explain a general case where there are a plurality of negative selectors and a plurality of private lines, the negative selector increases in accordance with the first dial number "6" and then rotates to find an empty line. At this time, if the line is already in use, air is coming out from another terminal corresponding to that terminal, so the terminal that does not have air coming out is rotated.

If all the lines connected to this level "6" are in use, it is determined that they are "busy," and a "busy tone" is sent to the calling party 11.

As mentioned above, when two offices have a dedicated line that directly connects them, charges will be added each time a call is made using the general line, but the charge for the dedicated line is only for a certain period of time. , so the more you use a dedicated line, the cheaper the communication costs will be, and the faster the connection time will be.

For this reason, dedicated lines are often busy during peak office hours. Previously, each time a call was needed, it was necessary to pick up the handset, dial, and check whether the connection would be established, which was time-consuming.

Conventionally, there are automatic dialing devices that store certain numbers in memory so that re-calling can be done easily. Also, some devices have a function that repeats the call if the person you made the call to is busy.

However, with the conventional devices described above, you either dial the number of the other party, confirm that the caller is busy, and operate a switch that causes the automatic dialing device to dial again, or you operate a switch that causes the automatic dialing device to dial again several times. , Even if the line is busy, you may dial in a hurry, and if you dial several times and it doesn't work, you won't dial for a while, so even if the line is busy, no one will dial. However, it also had the disadvantage of being inefficient.

The present invention was made in order to eliminate the above-mentioned drawbacks of the conventional system, and receives information from a private telephone exchange that a specific line is free, and in response to this, automatically sends a signal to seize that specific line. It is an object of the present invention to provide a specific line automatic acquisition device that enables efficient use of a specific line.

Embodiments of the present invention will be described below with reference to FIG. 2 and subsequent figures.

FIG. 2 shows a first embodiment, in which reference numeral 30 denotes a calling party's telephone, which is connected to a private branch exchange 31. In FIG. The exchange 31 has a terminal 31a that is disconnected when a specific line is busy. 32 is a switching circuit that outputs a signal only when earth air comes out to the terminal 31a. 33 is an automatic capture switch that is turned on when the caller is calling a specific line and wants to automatically capture the specific line when the busy state is released, and 34 is a delay circuit in the simplest case. A configurable priority circuit delays the output signal of switch circuit 32 for a predetermined period of time. 35 is a dial pulse generator which, upon receiving the output of the priority circuit 34, closes the line in a direct current manner, then intermittents the loop in a pulse manner, and sends a predetermined pulse to the exchange 31.
send to. 36 is a line monitor circuit which operates after the dial pulse generator 35 finishes sending pulses and monitors the line status. A unique component of the midtones,
For example, detecting the presence or absence of the 4001+2 component for a predetermined period of 6,
When there is a 400 Hz component, it is determined that the call is busy and the DC loop forming circuit of the dial pulse generator 35 is released.
Return the operation to the starting point.

Furthermore, if no component is detected in 40011 even after monitoring the frontage line for a predetermined period of time, it is assumed that the line has been captured, and the notification signal generation circuit 37 is activated, and the desired line is captured from the speaker 38 connected to it. inform the user. In response to this notification, the user can pick up the phone and dial the required number.

Although the priority circuit 34 basically does not need to be provided, it is effective when the service level is changed depending on the level of the users when there are multiple levels of users who want to receive the same service. If the highest level user removes this, even if the output from the switching circuit 32 enters the devices of multiple users at the same time, the transmission from the user with the priority circuit 34 will be sent one step later. If you apply at the same time as a user with a higher priority, the user with a higher priority will be given priority.

In addition, this circuit changes the entire time it takes for the output of the switching circuit 32 to go out in the loop of 32, 33, 34, and 35 until the output of the final pulse from the lateral pulse generator 35 is completed. The same effect can be obtained using the method.

With the above configuration, if the device that allows you to make calls using a dedicated line connected between two offices via a specific level of the exchange, if the line is not free, you can turn on the switch and the line will become free. As soon as the line is available, the system automatically dials the line, confirms that the line has been acquired, and then informs you of this, so you don't have to worry about picking up the phone each time to check. Therefore, it can be used efficiently and can also contribute to reducing communication costs.

When dialing for the first time after confirming that the line is free, you will no longer have to dial unnecessarily until you catch the line many times, so unnecessary operations such as the switch selector will no longer occur. .

In the embodiment described above with reference to FIG. 2, the user dials on his/her own in response to the notification of line capture, but after ordering a dial pulse to prevent line capture, the user responds to the dialed number of the party to be called. The dial signal to be sent may also be automatically ordered.

FIG. 3 shows a configuration for this purpose, in which an automatic call switch 4° is provided in place of the automatic capture switch 33 in FIG. By this means, a predetermined dial signal is sent out.

That is, the automatic call switch 4o is a selection switch that selects whether or not to activate the automatic dialing device 41 as soon as information that the line is free is obtained from the exchange 31 when the user dials a certain number but it is in a busy state. The automatic dialing device 41 sends out a predetermined dialing signal when the output of the switching circuit 32 is applied via the switch 40, which preferably always returns the number each time the user makes a call. It is best to use a type that stores the information in memory.

When a user makes a call to talk to someone at another office via a leased line (including groups) connected to a particular level of the exchange 31, but there is no free line on the leased line, the telephone receiver is turned off. , and then turn on the automatic call switch 5.

Then, as soon as the line is free, a signal is sent in a loop of 31, 32, 40, 41, and the automatic dialing device 41 is automatically activated.

In a call network using a dedicated line with other places, the system automatically re-calls depending on whether or not the line is busy, which is the most likely cause of a network connection, so you may have to wait for the line to become free. ,
There is no need to blindly dial, and even though the line is not idle, there is no need for unnecessary switchboard operations, and there is no fear of reducing the switchboard's throughput.

Additionally, as soon as a line becomes available, waiting users are automatically connected, increasing the efficiency of line usage.

In the above-described embodiment, a dedicated line is provided for transmitting signals from the exchange 31 to the switch circuit 32, but this signal transmission can also be performed by placing the signal on a public utility line.

As described above, according to the present invention, there is provided a detection means for detecting a traffic state of a specific level of a private branch exchange, and when the specific level at the time of dialing is busy, the detection means responds to the subsequent detection of the busy release by the detection means. , a signal generating means that automatically generates a signal corresponding to the specific level and sends it to the exchange, so that even if a specific line is busy when the dial is made, the system automatically generates a signal when the line becomes empty. This has the advantage that it is possible to avoid the loss of personnel and equipment due to repeated unnecessary dialing.

[Brief explanation of drawings]

Fig. 1 is a diagram showing a conventional private telephone system and a telephone communication system using a dedicated line between two offices, Fig. 2 is a diagram showing an embodiment of the present invention, and Fig. 3 is a diagram showing another embodiment of the present invention. It is a figure showing an example. 30...Telephone, 31...Private telephone exchange, 31a...Output, 32...Switching circuit, 34...Priority circuit, 35・
...Dial pulse generator, 36 ... Line monitor circuit, 37 ... Announcement signal generation circuit,
38...Speaker, 41...Automatic dialing device. Patent applicant Hideo Takino, agent of Pioneer Co., Ltd.

Claims (1)

[Scope of Claims] (1) Detection means for detecting a traffic condition of a specific level of an 1114 telephone exchange, and when the specific level at the time of dialing is busy, the detection means subsequently detects a release from the busy state. and a signal generating means for automatically generating a signal corresponding to the specific level and sending it to the exchange according to the above. (2) The signal generating means is characterized in that, following the signal corresponding to the specific level, the signal generating means automatically generates a signal string corresponding to the digits at the time of dialing and sends it to the exchange. The specific line automatic acquisition device described in (1). (3) a detecting means for detecting a traffic state of a specific level of a private telephone exchange, and when the specific level at the time of dialing is busy, responding to the specific level in response to a subsequent detection of a release from the busy state by the detecting device; A signal generating means for automatically generating and transmitting a signal to the exchange; and a time required for the signal generating means to generate a signal corresponding to the specific level in response to the detection of a busy release and transmitting the signal to the exchange. 1. A specific line automatic acquisition device comprising: a priority circuit for determining priority. (4) a detecting means for detecting a traffic condition at a specific level of a private branch telephone exchange; and when the specific level at the time of dialing is busy, the specific level is changed to the specific level in response to subsequent detection of a release from the busy state by the detecting means; Signal generation means automatically generates a corresponding signal and sends it to the exchange; and the detection means detects that a particular level is captured in the exchange that receives the signal corresponding to the particular level; A specific line automatic capture device characterized by comprising a notification means for notifying the capture of a specific line in response to a request.