JPH0216638B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an unmanned telephone connection device for automatically connecting an extension telephone for making and receiving calls to a central office line in a private telephone exchange.

Conventionally, an operator has been involved in making and receiving calls to and from a central office line in a private telephone exchange, except for outgoing calls and incoming calls.

FIG. 1 is a relay system diagram for explaining the incoming call connection in the private branch exchange.

When an incoming call is received from the central office line 1, the central processing unit 4 of the private branch exchange learns of the incoming call from monitoring the central office line trunk 2, notifies the operator at the relay stand 6, and when the operator answers, the central processing unit 4 of the private branch exchange receives a call from the central office line trunk 2 and informs the operator at the relay stand 6. Set the path to . The operator obtains the extension number from the caller and transmits the extension number to the central processing unit 4. The central processing unit calls the corresponding extension telephone from that extension number, and when it answers, establishes a path between the office line trunk and the extension telephone.

In this way, conventional incoming call connections cannot be made between the central office line and the extension telephone without the intervention of an operator.
The drawback was that callers were forced to wait when the operator was away or absent.

Further, the central processing unit also performs considerable processing operations regarding the connection between the office line and the extension telephone.

SUMMARY OF THE INVENTION An object of the present invention is to provide an unmanned telephone connection device that connects a central office line and an extension telephone for outgoing and incoming calls without operator intervention, and can reduce the role of a central processing unit in connection processing. It is in.

In order to achieve the above object, the present invention is inserted between a central office line and an extension telephone line of a private branch telephone exchange, opens and closes the connection between the central office line and the extension telephone line of the private branch telephone exchange, and connects the central office line and the extension telephone line. A telephone line circuit that sends and receives signals, a calling/receiving circuit connected to the calling line circuit, a voice response circuit that responds to outgoing/receiving calls with a voice message, and a calling/receiving circuit that responds to calls from the central office line. Means for receiving the incoming call detection signal to be output and activating the voice response circuit to send a stored voice message to the caller to the central office line, and an extension number from the central office line that is sent in response to this voice message. and means for transmitting the extension number to a central control unit of the private branch telephone exchange, detecting a response from the called extension telephone, and closing the communication line circuit to connect the central office line and the called extension telephone. receiving a call detection signal outputted by the calling/receiving circuit in response to a call from the extension, and activating the voice response circuit to send a stored voice message to the calling extension telephone; a means for transmitting a voice message to an extension, a means for receiving an external line number from a calling extension telephone sent in response to this voice message, a means for making a call to a central office line and transmitting the external line number, and a means for subsequently transmitting the above-mentioned telephone number. and a control circuit comprising means for closing the line circuit to connect the central office line and the calling extension telephone.

According to the above configuration, both outgoing and incoming calls can be performed automatically without operator intervention, and the object of the present invention is completely achieved.

Hereinafter, the present invention will be explained in more detail with reference to the drawings. FIG. 2 is a block diagram of a private branch telephone exchange for explaining an embodiment of the unmanned telephone connection device according to the present invention. In the figure, 12 is the network, 1
3 is a central processing unit, 14 is an extension telephone, 20 is a central office exchange, and unmanned telephone connection device 15 is connected to central office line 1.
1 and the extension telephone line 21.
The telephone line circuit 16 in the unmanned telephone connection device 15 connects and disconnects the central office line 11 and the extension telephone line 21, and transmits various signals from the central office line and the extension telephone circuit to the calling/receiving circuit and the control circuit. This circuit connects various signals from the calling/receiving circuit 17 and the control circuit 19 to the office line 11 and the extension telephone line 21. The outgoing/receiving circuit 17 is a circuit that detects an incoming call from the office line 11 and makes a call to the office line in response to a call from an extension telephone. The voice response circuit 18 is a circuit that sends a necessary voice message to the caller. Control circuit 1
Reference numeral 9 denotes a circuit that controls the entire telephone connection device. The control functions of the control circuit 19 can be roughly divided into an incoming call control unit that controls incoming calls from the central office line, and an outgoing call control unit that controls outgoing calls from the private branch exchange.

When a call is received from a central office line to an extension telephone, the following operations occur.

An incoming call from the office line 11 is received by a calling/receiving circuit 17 via a talking line circuit 16. This received signal is detected by the control circuit 19, and the control circuit 19 thereby controls the voice response circuit 18 and operates the voice response circuit 18 to transmit the voice message to the caller stored in the voice response circuit 18 to the central office line 11. . The content of the voice message sent at this time is, for example, “Here
○This is a company. Please press your extension number.'' When the caller hears this voice message and presses the desired extension number, it is detected by the control circuit 19, similar to incoming call detection, and the extension number is temporarily held. The control circuit 19 is the outgoing/receiving circuit 1
7. Make a call via the telephone line circuit 16 as an extension telephone of the private branch exchange, and send out the temporarily held extension number.

The central processing unit 13 of the private branch exchange detects this call, analyzes the received extension number, and calls the corresponding extension telephone 14, while transmitting a ring tone to the unmanned telephone connection device 15. As a result, when the extension telephone 14 answers, the extension telephone 14 is connected to the network 12 through a telephone trunk (not shown).
It connects to the unmanned telephone connection device 15 via.

The response of the extension telephone 14 is the unmanned telephone connection device 15.
It is also detected in the control circuit 19 of , and as a result, the control circuit 19 puts the communication line circuit 16 into the through state and connects the extension telephone 14 and the central office line 11 .

When the extension telephone 14 is busy, a busy tone is sent to the unmanned telephone connection device 15 through the network 12 and is detected by the control circuit 19 in the unmanned telephone connection device 15. In this case, the control circuit 19 controls the transmission of the voice message (busy message) to the caller stored in the voice response circuit 18 to the central office line 11.

Next, a case where a call is made from an extension telephone of a private branch exchange to a central office line will be explained.

When the extension number (for example, "0") in which the unattended telephone connection device 15 is accommodated is dialed from the extension telephone 14, the central processing unit 13 performs a general exchange process for connection between extension telephones.

The control circuit 19 of the unmanned telephone connection device 15 controls the response, and when the connection between the unmanned telephone connection device 15 and the calling extension telephone 14 is completed, the control circuit 19 transmits the voice stored in the voice response circuit 18 to the caller. A message such as ``External number please'' is controlled to be sent to the extension telephone side.

When the extension telephone 14 pushes an outside number in accordance with this voice message, it is received by the calling/receiving circuit 17 via the calling line circuit 16, and the control circuit 19 makes a call to the central office line 11 and sends out the outside number. Then, the telephone line circuit 16 is put into a through state, and the extension telephone 14 and the central office line 11 are connected.

As explained in detail above, according to the present invention, not only can a central office line and an extension telephone be automatically connected without operator intervention, but also the central processing unit of a private branch exchange can process the connection between extension telephones. Control (software) is simplified and reduced, making it possible to construct an economical private branch exchange system.

[Brief explanation of drawings]

FIG. 1 is a relay system diagram for explaining incoming call connection in a private branch telephone exchange, and FIG. 2 is a block diagram of the private branch telephone exchange for explaining an embodiment of an unmanned telephone connection device according to the present invention. 1, 11... Office line, 2... Office line trunk, 3, 12
...Network, 4,13...Central processing unit, 5,
14... Extension telephone, 6... Relay board, 7, 20... Central office telephone exchange, 15... Unmanned telephone connection device, 16... Passage line circuit, 17... Call originating/receiving circuit, 18... Voice response circuit, 19... Control circuit, 21 …Extension telephone line.

Claims (1)

[Claims] 1. A communication line circuit inserted between the office line and the extension telephone line of the private telephone exchange, which opens and closes the connection between the office line and the extension telephone line of the private telephone exchange, as well as transmitting and receiving signals to and from the office line and the extension telephone line; a calling/receiving circuit connected to the telephone line circuit; a voice response circuit for responding to incoming and outgoing calls with voice messages;
Means for receiving an incoming call detection signal outputted by the calling/receiving circuit in response to an incoming call from the central office line, and activating the voice response circuit to send the stored voice message to the caller to the central office line; Receive the extension number from the central office line sent in response to the
means for sending the extension number to a central control unit of the private branch exchange; and means for detecting a response from the called extension telephone and closing the communication line circuit to connect the central office line and the called extension telephone. receiving a call detection signal output from the call originating/receiving circuit in response to a call originating from the extension, and activating the voice response circuit to send the stored voice message to the calling extension telephone to the extension. a means for receiving an external line number from a calling extension telephone sent in response to the voice message, a means for making a call to a central office line and transmitting the external line number, and subsequently closing the telephone line circuit. 1. An unmanned telephone connection device comprising: a control circuit having a calling control means having means for connecting a central office line and a calling extension telephone;