JPS63161763A - Network connection controller - Google Patents

Abstract

PURPOSE:To control connection only with a PB signal which is an object and to remove erroneous actions caused by the PB signal except the object by discriminating the existence and the sorts of identifying elements supplied to the PB signal as for a control circuit and controlling the connection corresponding to the discriminated results. CONSTITUTION:A titled controller provides a used state storage means 200a which identifies to store the used state of an outgoing side which executes an outgoing call or an incoming side which has an incoming call every begining of a call, an identifying element giving means 200b which gives the identifying element to the PB signal corresponding to the used state stored in the used state storage means 200a when the PB signal is transmitted from a terminal in order to attain the control of the connection and circuits 25-27. By discriminating the existence and the sorts of the identifying elements supplied to the PB signal, the control of the connection can be executed corresponding to the discriminated results in a control circuit 200. Thus, an extension transfer with erroneous actions caused by the PB signal, transmitted from the telephone set of an opposite side, which can not be the object in substance can not be attained.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a network connection control device having an extension transfer function.

(Conventional technology) FIG. 3 is a diagram showing the configuration of a conventional network connection control device.

In this figure, 1.2 is the extension to which the telephone is connected, 3
is the extension to which the facsimile is connected, 4 is the data terminal, and 5 is the extension to which the facsimile is connected.
is the 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 is a loop monitoring of the extension 1.2.3, respectively. In the circuit, 14.15 is a power supply, and the respective voltages are +EV and -EV. 16 is a PB signal receiving circuit, 17 is a 1100Hz detection circuit, 18 is a voice synthesis sending circuit, 19 is a dial signal sending circuit, 20 is a BEEP sending circuit, 21 is a modulation/demodulation circuit, 22 is a signal switching circuit, and 23 is a relay for receiving. The switch 24 is a relay switch for switching the calling signal generation circuit, 25, 26, 27 is a relay switch for switching the extension line, and 100 is a control circuit.

Next, the extension transfer function will be explained.

Since this network connection control device has an extension transfer function, even when a call is received from line 5 and a call is being made on extension 1 as shown in FIG. The call can be transferred to extension 2 by pressing "2" on the dial button (not shown) and sending out a PB double signal.

In other words, the PB multiplied signal information sent from extension 1 is
When the B signal is received by the control circuit 100 via the B signal reception circuit 16, the control circuit 100 captures the line 1 by the loop creation circuit 9, inverts the relay switches 24, 25, and 26, and turns the ringing signal generation circuit 10 on. to start. Through these series of operations, the calling signal generation circuit 1
The ringing signal generated at 0 is sent to the telephone connected to extension 2 (
(not shown), and its internal sounder sounds to notify you of the incoming call.

Therefore, if you go off-hook at this time, this will be detected by the loop monitoring circuit 12, and the control circuit 100 will reverse the relay switch 24 and stop the loop creation circuit 9 and the calling signal generation circuit 1o, completing the extension transfer. .

[Problem that the invention seeks to solve]

However, in the conventional network connection control device as described above, the PB
Since the signal receiving circuit 16 is configured to receive the PB double signal sent from the other party via the line 5, the other party can transfer extensions using a telephone connected to a similar network connection control device with an extension transfer function. If you do so, a malfunction may occur in which the PB double signal is received and the extension is transferred, and if the other party uses a regular telephone that does not have an extension transfer function, the other party may accidentally press the dial button, etc. There was a problem that similar malfunctions occurred when receiving the PB multiplied signal.

The present invention has been made in order to solve such problems, and provides a network connection control device that does not malfunction and transfer extensions due to a PB double signal sent from a telephone at the other end, which is not originally intended. With the goal.

[Means for solving problems]

The network connection control device according to the present invention includes a usage state storage means for identifying and storing the usage state of the calling party that made the call and the receiving party that received the call, and a terminal for controlling the connection. identification element providing means for providing a PB multiplied signal identification element corresponding to the usage state stored in the usage state storage means when the PB multiplied signal is sent from the P
The configuration is such that the presence or absence of the identification element to which the B-fold signal is attached is determined, and the connection is controlled in accordance with the result.

[Effect]

In this invention, the PB double signal sent from the terminal connected to the extension during a call is given an identification element corresponding to the usage state stored in the usage state storage means by the identification element adding means, and is controlled by the identification element adding means. The circuit determines the presence/absence of the identification element to which the PB multiplied signal is attached.
It is determined whether the B-fold signal is spontaneous or not, and connection control is performed according to the result.

〔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 symbols as in FIG. 3 indicate the same parts,
A control circuit 200 performs, for example, extension transfer as connection control corresponding to the PB double signal sent from a terminal connected to the extension. Reference numeral 200a denotes a usage state storage means that identifies and stores the usage state of either the calling party who made the call or the receiving party who received the call each time a call is started. Reference numeral 200b denotes a relay switch control means that outputs, for example, a blank of a certain length as an identification element from relay switches 25, 26, 27 for switching extensions.
An identification element providing means for providing a B-fold signal is configured.

Next, the operation will be explained.

Assume that there is an incoming call from line 5, and the call is being made on extension 1 as shown in FIG. In this state, extension 1
If a caller wishes to transfer an extension, he or she can simply press a predetermined dial button on the telephone and send out a PB double signal in the same way as with conventional network connection control devices. When the signal PB signal receiving circuit 16 detects the signal, the control circuit 2o○ turns on the relay switch control means 200b.
, and the relay switch control means 200b reads out the usage status of either the calling party or the receiving party from the usage status storage unit 200a during the call.

Since this state of use is on the incoming call side, the relay switch 25 is controlled to provide a blank of a certain length at a predetermined timing, for example, in response to a certain PB flaw signal as shown in FIG. 2(a). At that time, the line 5 is looped off, so the loop creation circuit 9 is operated to prevent instantaneous interruption during the blank period. In addition, if the usage state is on the calling side, for example, the state shown in FIG. 2(a) as shown in FIG. 2(b)
Provide a blank with a different length from the blank shown in .

The PB sent out through the relay switch 25 in this way
The flaw signal information is sent to the control circuit 2 via the PB signal receiving circuit 16.
00, the control circuit 200 determines whether or not this PB flaw signal is spontaneous by determining the presence or absence of an identification element, that is, a blank, to which the PB flaw signal is attached, and the difference in the period of the blank. , the extension is transferred only when it is determined that the message is spontaneous and not transmitted via the line 5, and is not transferred in any other case.

Therefore, when an extension is transferred within the other party's network connection control device with the same configuration, the PB defect signal information sent via the line 5 is transmitted to the control circuit 200 via the PB signal receiving circuit 16.
Even if the PB scratch signal is captured in Figure 2 (a), (
Since there is a difference between the calling side and the called side during the blank period as shown in b), it is not determined that the call is spontaneous, and the control circuit 200 does not transfer the extension.

Similarly, from a telephone that is not connected to a network connection control device with the same configuration, a P
Even if the information on the B signal signal is taken into the control circuit 200 via the PB signal receiving circuit 16, the blank under the control of the relay switch 25 is not given the PB scratch signal.
Control circuit 200 does not perform extension transfer.

In addition, in the above embodiment, the case where extension transfer is performed as connection control corresponding to the PB defect signal sent from the terminal connected to the extension has been described, but the present invention is not limited to this, and transfer via the line is explained. The present invention can also be applied to cases where other connection controls are performed in response to PB flaw signals sent out.

Further, in the above embodiment, an example was explained in which a blank of a fixed length different between the calling side and the receiving side was attached as an identification element to a PB flaw signal, but the identification element is not limited to this, and for example, as shown in FIG. ).

It goes without saying that the number of blanks to be applied may be varied, as shown in (e).

〔Effect of the invention〕

As explained above, the present invention includes a usage state storage means for identifying and storing the usage state of the calling party making the call or the receiving party making the call, and a terminal device for controlling the connection. and an identification element applying means for applying a PB flaw signal identification element corresponding to the usage state stored in the usage state storage means when the PB flaw signal is sent, and the control circuit is configured to identify the identification element to which the PB flaw signal is applied. Since the configuration is configured to determine the presence/absence of nine types and perform connection control according to the result, connection control is performed only based on the target PB flaw signal, and non-target PB damage signals are used.
This has the effect of preventing malfunctions caused by the B-flaw signal.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing the configuration of an embodiment of the network connection control device of the present invention, FIGS. 2(a) to (e) are diagrams for explaining the invention in detail, and FIG. FIG. 3 is a diagram showing the configuration of a connection control device. In the figure, 1.2.3 is an extension, 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 calling signal generation circuit; 11.
12.13 is the loop monitoring circuit, 14.15 is the power supply, 16
is a PB signal receiving circuit, 19 is a dial signal output path, 2
3.24゜25.26.27 is a relay switch, 200
200a is a control circuit, 200a is a usage state storage means, and 200b is a relay switch control means. Figure 2 (e)”-Docho-m

Claims (1)

[Claims] In a network connection control device having a control circuit that branches and switches a telephone network line into a plurality of extensions and performs connection control corresponding to a PB signal sent from a terminal connected to the extension during a call, each time the call is started, a usage state storage means for identifying and storing the usage state of the calling party that made the call or the receiving party that received the call; identification element adding means for adding an identification element to the PB signal in accordance with the usage state stored in the state storage means, and the control circuit determines the presence or absence and type of the identification element added to the PB signal. A network connection control device characterized in that it is configured to perform the connection control according to the result.