JPH059983B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention has a control circuit that performs connection control corresponding to a signal sent from a terminal connected to the extension line or a signal sent out via the line. This invention relates to a rope connection control device.

[Conventional technology]

FIG. 3 is a diagram showing the configuration of a network connection control device previously proposed by the applicant.

In this figure, 1 and 2 are extensions to which a telephone is connected, 3 is an extension to which a facsimile is connected, 4 is a data terminal, 5 is a line, 6 is a protection circuit, 7 is an incoming call detection circuit, 8 is a polarity detection circuit, 9 is a loop creation circuit, 10 is a call signal generation circuit, 11, 12, 13
are loop monitoring circuits for the extensions 1, 2, and 3, respectively, and 14 and 15 are power supplies, and their respective voltages are +
EV, -EV. 16 is a PB signal receiving circuit, 17 is a beep signal (BEEP signal: 1100Hz) detection circuit, 18 is a voice synthesis sending circuit, 19 is a dial signal sending circuit, 20 is a beep signal (BEEP signal: 1100Hz) sending circuit, 21 is a modulation/demodulation circuit circuit, 22
23 is a signal switching circuit, 23 is a relay switch for incoming signals, 24 is a relay switch for switching a calling signal generation circuit, 25, 26, 27 is a relay switch for switching extension lines, and 100 is a control circuit.

The operation will be explained below.

In this network connection control device, when an incoming call is received via the telephone network and the control circuit 100 detects the incoming call via the incoming call detection circuit 7, the relay switch 23 is reversed, and the loop creation circuit 9 captures the line 5. Make a tentative call. Next, the BEEP signal sending circuit 20
Therefore, a BEEP signal of, for example, 1100 Hz is sent via line 5 to the other party via the telephone network, which is the originating side. Then, a PB signal as a selection signal for selecting the telephone to receive the call via the line 5 is normally sent within a certain period of time after the provisional call reception, for example, within 4 seconds as the selection signal receivable time. When this signal is sent, the control circuit 100
This PB taken in via the PB signal receiving circuit 16
The signal information is judged and it is determined which of extensions 1 to 3 should receive the call. For example, if extension 2 is selected, the relay switches 24 and 26 are reversed and the ringing signal generation circuit 10 is activated. With,
A message such as "I will call you, please wait" is transmitted from the speech synthesis and transmission circuit 18 via the line 5. Through a series of operations, the calling signal generated by the calling signal generating circuit 10 reaches the telephone (not shown) connected to the extension 2 via the relay switch 24, and causes its internal sounder to ring. .

Furthermore, if the PB signal is not sent within 4 seconds, the ringing signal generated by the ringing signal generation circuit 10 is transmitted via the relay switch 24 to the telephone connected to extension 1, which is set to receive a call in advance. reach it and set off its internal sounder.

In either case, if the sounder goes off-hook while the sounder is ringing, loop-on is detected by the loop monitoring circuit 11 or 12, so the control circuit 100
This inverts the relay switch 24, and also stops the loop creation circuit 9 and the calling signal generation circuit 10, making it possible to talk.

In addition, such a network connection control device has an extension transfer function, so that even when a call is being made on extension 1 as shown in FIG. By pressing "2" (not shown) and sending the PB signal,
The call can be transferred to extension 2.

That is, the information of the PB signal sent from the extension 1 is transmitted to the control circuit 10 via the PB signal receiving circuit 16.
0, the control circuit 100 captures the line 5 by the loop creation circuit 9, inverts the relay switches 24, 25, and 26, and activates the calling signal generation circuit 10. Through these series of operations, the calling signal generated by the calling signal generating circuit 10 reaches the telephone (not shown) connected to the extension 2, and its internal sounder sounds to notify the telephone of the incoming call.

Therefore, if an off-hook occurs at this time, this will be detected by the loop monitoring circuit 12, and the control circuit 100 will invert the relay switch 24, stop the loop creation circuit 9 and the calling signal generation circuit 10, and transfer the extension. complete.

[Problem that the invention seeks to solve]

However, in this type of network connection control device proposed earlier, for example, a selective incoming call function with a configuration similar to that shown in FIG. If a call is made to a similar telephone set connected to the extension of the network connection control device of the other party (receiving party) equipped with the Whether the PB signal sent from the caller's phone via line 5 in order to connect to the extension or select the phone to receive the call within the specified time is a PB signal for the selection signal to select the other party. Since it is not possible to distinguish whether the PB signal is from the calling party's telephone itself connected to its own extension 1 and is for transfer to its own extension, it is the PB signal sent via line 5 to connect the called party's telephone. However, there was a problem in that the calling side of the own device misunderstood the signal as a signal for extension transfer and transferred the extension to another telephone.

This invention was made in order to solve this problem, and it prevents the calling side from malfunctioning by transmitting the signal used for the selection signal etc. after making the call and connecting with the other party. The purpose is to obtain a network connection control device.

[Means for solving problems]

An extension circuit that branches a telephone network line into a plurality of lines and accommodates and connects each terminal device, a circuit that sends a dial signal from a calling terminal device to the line, and a polarity detection circuit that detects polarity reversal information from the line. ,
A beep signal detection circuit that detects a predetermined beep signal input from the line and sends it to the calling terminal device, and a selection signal sent from the calling terminal device for selecting a terminal device of the other party via the line. a selection signal transmitting/receiving circuit that receives and transmits the selected signal to the line;
The selection signal from the transmitting terminal device is transmitted within a predetermined period of time from when the polarity reversal information is detected by the polarity detection circuit or from the time when the beep signal is detected by the beep signal detection circuit. When the selection signal is received by the transmitting/receiving circuit, the selection signal is sent to the line and controlled so as to be selectively connected to the other party's terminal device via the line, and the selection signal is transmitted over the predetermined period of time. and a control circuit configured to identify the selection signal as an extension transfer signal to another terminal device when received and perform extension transfer control.

[Effect]

In this invention, when a call is made to a terminal connected to a network connection control device that has a function of controlling connection by a signal sent through a line within a certain selection signal receivable time from the time of incoming call, ,
Connection control corresponding to the signal sent from the terminal connected to the extension is not performed until at least the selection signal receivable time has elapsed from the time when the polarity reversal or notification of incoming call is detected.

〔Example〕

FIG. 1 is a diagram showing the configuration of an embodiment of a network connection control device of the present invention.

In this figure, the same reference numerals as in FIG. 3 indicate the same parts, and 200 is a control circuit, which has at least functions equivalent to those of the network connection control device in FIG. 3, that is, a selective call reception function and an extension transfer function. DP sent from the terminal connected to extensions 1 to 3
The signal is detected by loop monitoring circuits 11 to 13 and transferred to an extension line. When the PB signal is sent out, it is detected by the PB signal receiving circuit 16.

Further, FIG. 2 is a diagram showing a sequence at the time of transmission in this invention.

The operation will be explained below with reference to FIG.

Now, when transferring an extension, a telephone number (not shown) connected to extension 1 of one's own phone number 3 is sent via line 5.
Assume that a dial call is made to, for example, a telephone set at extension 2, which is connected to an extension of a network connection control device having a selective call termination function similar to the network connection control device shown in the figure. Next, when a tentative call is received by the other party via the line, a loop is created, and this is notified to the calling party (self) as polarity reversal information by the PBX or telephone network. Further, similarly to the configuration shown in FIG. 3, after receiving a tentative call, the other party sends a BEEP signal to the calling party. Therefore, in the transmission side network connection control device of the present invention, the control circuit 200 detects the polarity reversal information and the BEEP signal using the polarity detection circuit 8 and the control circuit 200.
This is performed by the 1100Hz detection circuit 17, and at the time of detection, the other party recognizes that a tentative call has been received.
From this point on, until a time longer than 4 seconds (for example, 5 seconds) has elapsed as the selection signal receivable time, the loop monitoring circuit 11 sends out the DP signal as a selection signal from the telephone connected to extension 1. It is converted into a PB signal and sent to the other party via line 5. However, at this time, the control circuit 200 does not take in the DP signal detected by the loop monitoring circuit 11 as a signal for performing extension transfer.

Then, after 5 seconds have elapsed since the polarity reversal information or the beep signal was detected, the control circuit 200 detects a signal input from extension 1 and transfers the DP signal to the loop monitoring circuit 1.
1 and transfer the extension to your own other extension telephone.

Therefore, the signal sent from the terminal to perform extension transfer will not result in selective call termination.

In addition, in the above embodiment, a configuration was shown in which the DP signal is converted to a PB signal and sent out separately as a selection signal, but the PB signal is also used for extension transfer, and the control circuit controls the function of the PB signal by monitoring a timer. It is also possible to configure it to be differentiated.

〔Effect of the invention〕

As explained above, this invention includes a control circuit that
The selection signal from the transmitting terminal device is transmitted within a predetermined period of time from when the polarity reversal information is detected by the polarity detection circuit or from the time when the beep signal is detected by the beep signal detection circuit. When the selection signal is received by the transmitting/receiving circuit, the selection signal is sent to the line and controlled so as to be selectively connected to the other party's terminal device via the line, and the selection signal is transmitted over the predetermined period of time. When received, the selection signal is identified as an extension transfer signal to another terminal device, and extension control is performed. When making a call to the other party's terminal connected to a network connection control device that has the function of controlling connections using signals sent by Since the configuration is such that connection control corresponding to the signal for extension transfer sent from the terminal connected to the extension is not performed until the select signal receivable time (certain time) has elapsed, the receiving party's telephone The signal from the transmitting side used as the selection signal has the effect of preventing the transmitting side from malfunctioning.

[Brief explanation of drawings]

FIG. 1 is a diagram showing the configuration of an embodiment of the network connection control device of the present invention, FIG. 2 is a diagram showing the sequence at the time of a call, and FIG. 3 is a diagram showing the configuration of a conventional network connection control device. . In the figure, 1, 2, 3 are extensions, 4 is a data terminal, and 5
is a line, 6 is a protection circuit, 7 is an incoming call detection circuit, 8 is a polarity detection circuit, 9 is a loop creation circuit, 10 is a ringing signal generation circuit, 11, 12, 13 are loop monitoring circuits, 14, 15 are power supplies, 16 is the PB signal receiving circuit,
17 is a beep signal detection circuit, 18 is a voice synthesis output circuit, 19 is a dial signal sending circuit, 20 is a beep signal sending circuit, 21 is a modulation/demodulation circuit, 22 is a signal switching circuit, 23 is a relay switch for receiving, and 24 is a calling circuit. Relay switch for signal generation circuit switching, 2
5, 26, 27 are relay switches for switching extensions;
200 is a control circuit.

Claims (1)

[Claims] 1. An extension circuit that branches a telephone network line into multiple lines and accommodates and connects each terminal device, a circuit that sends a dial signal from a calling terminal device to the line, and a polarity detection circuit that detects polarity reversal information from the line. a beep signal detection circuit that detects a predetermined beep signal input from the line and sends it to the calling terminal device; and a selection for selecting a terminal device of the other party via the line that is sent from the calling terminal device. A selection signal transmitting/receiving circuit that receives a signal and sends it to the line, and a selection signal from the transmitting terminal device, when the polarity detection circuit detects polarity reversal information or the beep signal detection circuit detects a beep signal. When the selection signal is received by the selection signal transmitting/receiving circuit within a predetermined period of time from the time when the selection signal is sent to the line, the selection signal is controlled to be selectively connected to the terminal device of the other party via the line. , a control circuit configured to identify the selection signal as an extension transfer signal to another terminal device and perform extension transfer control when the selection signal is received beyond the predetermined period of time; A network connection control device comprising: