JPS63151197A - Key telephone system - Google Patents

Abstract

PURPOSE:To execute a reliable originating dial number specification service even when, for instance, the multi-frequency signal of a specified dial number is inputted by providing a supervising means to supervise a dial signal, transmitted to a connection line to an exchange. CONSTITUTION:When a dial information is inputted from an MF (multi- frequency signal) dial pad to a key telephone terminal equipment 10 by placing an acoustic coupler on a microphone, it is directly transmitted to the exchange 20 through an extension 40, a line connection circuit 32 and an MF line 21. On the way of the transmission, the dial information is detected by a transmitted dial signal supervisory circuit 31, and is informed to an originating dial number specification and analysis circuit 34 through a control circuit 33. Then, when the circuit 34 detects that it is the dial number of an originating number specification, and informs to the control circuit 33, the circuit 33 controls the line connection circuit 32 so as to disconnect and terminate the connection of the MF line 21 between the key telephone terminal equipment 10, which has originated the specified dial number, and the exchange 20, and the disconnection is performed.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a button telephone device.

[Conventional technology]

Conventionally, in this type of button telephone device, the button telephone terminal is connected to the key telephone main device through a data line and a voice line.
Dial information from the key telephone terminal is sent off-hook via the data line to the key telephone main unit as, for example, 4-bit data, where it is sent as a dial signal (MF signal or rotary dial signal) corresponding to the line to the central office exchange. ) and sent to the line. Therefore, it is possible to control outgoing dial numbers within the key telephone main unit.

However, after off-hook, the main device of the key telephone terminal is connected to the telephone line from the handset side of the key telephone terminal.

It is possible to send signals such as dial signals directly to the central office exchange via the line.

[Problem that the invention seeks to solve]

Even if the above-mentioned conventional button telephone device provides an outgoing dialing number restriction service that prohibits dialing, for example, to the area code "0471," the button telephone terminal cannot be accessed via the button telephone main device after the button telephone terminal goes off-hook. After capturing the multi-frequency signal dial line (hereinafter referred to as MF line) with 0471-82re,
As a result, the key telephone terminal has the telephone number "0471-"
82-1111" telephone.

That is, even though outgoing dialing numbers are restricted, the restricted dialing numbers input from the transmitter side of the key telephone terminal are not checked by the button telephone main device, and as a result, outgoing dialing numbers are not restricted. The disadvantage is that it is not.

[Means for solving problems]

The button telephone device of the present invention includes a plurality of button telephone terminals and a button telephone main device connected to an exchange through at least one line, wherein the button telephone device has a plurality of button telephone terminals and a key telephone main device connected to an exchange through at least one line. A dial signal monitoring means is provided for monitoring the dial signal sent from the key telephone.

〔Example〕

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing one embodiment of the present invention.

In FIG. 1, the present embodiment has a plurality of button telephone terminals 1.
0, an exchange 20, and a key telephone main device 30.

The button telephone main device 30 includes a plurality of button telephone terminals 10
a line connection circuit 32 which is connected to each of the above via an extension 40 and to the exchange 20 via an MF line 21;
An outgoing dialing signal monitoring circuit 31 that monitors dialing signals sent out from each MF line 21, an outgoing dialing number regulation analysis circuit 34 that analyzes restricted dialing numbers from outgoing dialing information, and an outgoing dialing number regulation analysis circuit 34 The control circuit 33 controls the line connection circuit 32 based on information from the circuit 34.

Next, the operation of this embodiment will be explained.

Now, one key telephone terminal 10 is off-hook, extension 401 line connection circuit 32. Assume that the device connects to the exchange 20 via the MF line 21 and captures one line of the MF line 21. Further, it is assumed that the outgoing dial number restriction analysis circuit 34 has set "0471°" as the restricted dial number.

An acoustic coupler is applied to the transmitter (not shown) of the button telephone terminal 10, and "
0471-82-1111'' is inputted continuously, this dial information is sent directly to the exchange 20 via the extension 40° line connection circuit 32.MF line 21.

During the sending of this dial information, dial information "0471-82-1111" is detected from the MF line 21 by the sending dial signal monitoring circuit 31, and the control circuit 3
3 to the outgoing dial number 1 system analysis circuit 34. When dial information "0471" is input, the outgoing dial fraud restriction analysis circuit 34 detects that it is a dial number "0471" under outgoing dial number regulation and notifies the control circuit 33. When the control circuit 33 receives a notification from the outgoing dial number restriction analysis circuit 34 that the outgoing dial number restriction dial number has been detected, the control circuit 33 sends the key telephone terminal 10 and the exchange 20 that have transmitted the restricted dial number to the line connection circuit 32.
The connection of the MF line 21 to the MF line 21 is controlled to be terminated, the disconnection is executed, and the series of operations is completed.

In this way, the outgoing dial number regulation service is also executed for the MF signal dial input from the transmitter of the button telephone terminal tR10.

〔Effect of the invention〕

As explained above, the present invention has a monitoring means for monitoring the dial signal sent to the connection line to the exchange, so that the MF signal of a regulated dial number is transmitted from the transmitter of the key telephone terminal. Even if it is input, it is detected as an outgoing dial signal to the connection line to the exchange, and has the effect of ensuring reliable outgoing dial number regulation service.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of the present invention. 10... Button telephone terminal, 20... Switchboard, 21
...Multi-frequency signal dial line (MP line), 30.
...Button telephone main device, 31... Outgoing dial signal monitoring circuit, 32... Line connection circuit, 33... Control circuit, 34... Outgoing dial number regulation analysis circuit, 40...
·extension.

Claims (1)

[Claims] In a button telephone device having a plurality of key telephone terminals and a key telephone main device connected to an exchange through at least one line, a signal from the key telephone device sent to the line in the key telephone main device is provided. A button telephone device characterized by comprising dial signal monitoring means for monitoring dial signals.