JPH02284561A - Private automatic exchange - Google Patents

Abstract

PURPOSE:To considerably save the trouble and the time of a subscriber who gives a call from a line wire by automatically transmitting a message which requests the dial transmission of a self telephone number to the subscriber, storing the dialled telephone number, lighting and displaying a message lamp when a system is busy. CONSTITUTION:When an extension terminal is busy, a control part 6 transmits a control signal to a cross point part 7, forms the pass of a trunk line control part 5, an OGM control part 8 and a DTMF receiver 9 and transmits the request message of the line wire telephone number such as 'A system is busy now. Please dial your telephone number. Later, I will call back.' to the subscriber 1. When the subscriber 1 dials the self telephone number on the other hand, a control part 15 stores the telephone number of the received subscriber 1 in a memory device 16, lights the message lamp 18 and informs the extension terminal 4 that there has been an incoming call from the line wire.

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to an automatic private branch exchange.

(Prior art) Figure 3 shows a conventional dial-in automatic private branch exchange (
The schematic configuration of the PBX (hereinafter abbreviated as PBX) is shown below.

FIG. 4 is a flowchart showing the operation.

Suppose that there is an incoming call from an outside line subscriber 1 to the PBX 3 via the telephone office 2 to call an internal terminal device (hereinafter referred to as an extension terminal) (see step 1 in Fig. 4, hereinafter referred to as step S). abbreviated).

The incoming call is detected by the office line control unit 5 of the PBX 3, and a control signal is sent to the control unit 6, and the office line control unit 5 captures the office line based on the control signal from the control unit 6 (Fig. 4, S2 )
. The control section 6 sends a control signal to the crosspoint section 7 to control the office line control section 5 and the transmission of messages.
M (Out Gojng Message) control unit 8
and DTM F (Du
al, Tone Mul, ti Frequency
) forming a path for the receiver 9; As a result, the control unit 6
starts the OGM control unit 8 and sends a message such as "Please dial the extension number" to the subscriber 1 via the route 8-7-5-2-1 (see 83 in the same figure). )
, the user dials the extension number of the extension terminal (extension terminal 4 is taken as an example here) with which the user wishes to make a call.

As a result, the extension number from subscriber 1 is received by the DTMF receiver 9 via the path 1-2-5-7-9 (S4 in the same figure).
), the received extension number data is sent to the control section 6 and analyzed, and the path between the office line control section 5, DTMF receiver 9, and OGM control section 8, which are connected by the cross point section 7, is disconnected. Thereafter, the control unit 6 checks whether the extension terminal 4 corresponding to the analyzed extension number data is busy (S5 in the figure).

If the above effect is not busy, the control unit 6 sends a control signal to the crosspoint unit 10, and the extension control unit (herein referred to as extension control unit 11) corresponding to the analyzed extension number data, A path is formed with the line control unit 5, and 1-2
The subscriber 1 and the extension terminal 4 are connected through the route 5-1.0-11-4, and the communication is enabled (S6) in the figure.

On the other hand, if the result of the call check is busy, the control section 6 sends a control signal to the crosspoint section 10 to form a path between the office line control section 5 and the 1--tone generating section 12, 2
-do - Cause subscriber 1 to send a busy tone via route 5-2-1. After that, if the subscriber 1 goes on-hook or remains off-hook for a certain period of time, the control unit 6
A reorder 1-- is sent to the central office line control unit 5, and the central office line connected to subscriber 1 is disconnected (S7',
S8).

Therefore, if the extension terminal 4 is busy as described above, the subscriber 1 needs to dial again at an appropriate time after going on-hook.

(Problems to be Solved by the Invention)] - As mentioned above, in conventional PBXs, if the extension terminal that a subscriber calls is busy, the subscriber goes on-hook and waits, and then dials again after an appropriate period of time. There was a drawback.

An object of the present invention is to provide a PBX that eliminates the drawbacks of the conventional devices mentioned above.

(Means for Solving the Problems) The present invention achieves the object described in "-" by using an extension terminal having a message lamp, a message button, and a memory device in a private automatic branch exchange, and a subscriber accessing the extension terminal by dial-in. When a call is made and the call is busy, a message requesting the subscriber to dial his own telephone number is automatically sent, and the dialed telephone number is stored in the memory device, and a message lamp is displayed. This is achieved by displaying the phone number in the memorized state and automatically dialing the subscriber having the memorized telephone number by pressing the message button after knowing the lighted display.

(Function) According to the pBx of the present invention having the above configuration, when the other party's extension terminal is busy, the subscriber who made the call dials his own telephone number according to the message, then goes on-hook and waits until the other party's extension terminal is busy. Since a call can be made by simply waiting for a call from an extension terminal, the trouble and time of the subscriber calling from an outside line can be greatly saved.

(Example) Hereinafter, the present invention will be explained with reference to Examples and drawings.

FIG. 1 is a configuration diagram of an embodiment of the PBX of the present invention. The operation will be explained with reference to the flowchart in FIG.

Note that the same reference numerals as in FIG. 3 or parts having the same functions will be described using the same reference numerals.

First, the operation up to step 6, in which the extension terminal corresponding to the data received by the DTMF receiver 9 is not busy and is able to make a call based on the busy check result in the control unit 6 in FIG. 3, is directly applicable to the present invention. Therefore, the explanation will be omitted to avoid duplication.

Now, as a result of the busy check in the control unit 6, if the extension terminal (hereinafter, this is assumed to be the extension terminal 4) is busy (the second
(a), S7), the control unit 6 sends a control signal to the cross point unit 7, and connects the station line control unit 5, OGM control unit 8 and D
A path is formed for the TMF receiver 9, and a control signal is also sent to the ○GM control unit 8 to start it up, 8-7-5-2-
Using route 1, a message requesting an external phone number such as ``We are currently busy. We will call you later, so please dial your phone number.'' is sent to subscriber 1. Figure, S8).

On the other hand, when the subscriber 1 dials the white telephone number (S9 in the same figure), the telephone number is received by the DTM F receiver 9 via the route 1-25-7-9 (in the same figure, S9). 510). As a result, the DTMF receiver 9 sends the external telephone number data of the subscriber 1 to the control section 6, which sends it to the data transmission section 13, passes it through the data transmission section 14 of the extension terminal 4, and transmits it to the extension terminal 4. 4 control unit 15
The control unit 15 stores the received phone number of the subscriber 1 in the memory device (hereinafter referred to as memory) 6 (511 in the figure), and sends a control signal to 1017 to send the message. Turn on the lamp 18 (see Figure 5)
12) Notify the extension terminal 4 that there has been an incoming call from an outside line. After the telephone number data is sent from the subscriber 1 to the data transmission section 13, the control section 6 activates the OGM control section 8, and transmits 8-. 7-5-2-1 to subscriber 1, [
I have remembered your phone number. I'll call you later. ” will be sent. Thereafter, a control signal sent from the control section 6 to the cross point section 7 causes the station line control section 5 and the DTMF receiver 9, O
The path of the GM control unit 8 is cut off, and the office line to which the subscriber 1 is connected is also cut off by a control signal from the control unit 6 to the office line control unit 5.

If the telephone number is not dialed from the subscriber 1 in Step 10 of 1H (FIG. 513), the control unit 6 sends the cross-point unit 7 to the office line control unit 5, the OGM control unit 8, and the D.
The path of the TMF receiver 9 is separated, and then a control signal is sent to the cross point section 10 to form a path between the office line control section 5 and the tone generation section 12, and 12-10-5-2
A reorder 1.- is sent to subscriber 1 via the route 1 (514 in the figure).

After that, when subscriber 1 goes on-hook or remains off-hook for several seconds, a control signal is sent from the control unit 6 to the central office line control unit 5, and the central office line that subscriber 1 has acquired is released (Fig. , 515).

The message lamp 18 is lit (Fig. 2(b),
S] 6) When the extension terminal 4 presses the message button 19 (517 in the same figure), the control unit 6 reads from the memory 16,
The stored telephone number data is read out and sent to the control unit 6 via the data transmission unit 14 via the route 14-13-6, and upon receiving it, the control unit 6 sends a control signal to the crosspoint unit 10. , the extension control unit 11 and the central office line control unit 5 and D
It forms a path for the TMF generator 20, analyzes the received telephone number, sends a control signal to the DTM generator 20, and calls the subscriber 1 by calling an outside line via the route 20-10-122. , 818), subscriber 1 is now able to talk to extension terminal 4.

That is, even if the other party is busy, the subscriber on the outside line can automatically talk to the PBX's extension terminal without having to dial again.

(Effects of the Invention) As is clear from the detailed explanation above, the PBX of the present invention has the following features:
When a subscriber dials in from an outside line and the other party's extension terminal is busy, the subscriber is requested to send a telephone number, and in response, the telephone number of the dialed subscriber is stored in the extension terminal, and the call is made at the same time. By turning on the message lamp to notify you that there has been a phone number, and pressing the message button attached to the extension terminal ↓, a call will be automatically made to the external phone number stored above, so the external phone subscriber can Even if the extension terminal is busy, the subscriber can make a call by waiting for a call from the extension terminal without having to re-dial himself/herself, and the subscriber does not have to worry about ending the conversation on the extension terminal in order to redial. This is a mental and time-saving dialing method, so you can get great results by implementing it.

[Brief explanation of drawings]

FIG. 1 is a schematic configuration diagram showing an embodiment of the present invention, FIG. 2 is a flowchart 1 explaining its operation, FIG. 3 is a schematic configuration diagram showing a conventional PBX, and FIG. 4 is a schematic diagram of the configuration. This is a flowchart 1 for explaining the operation. L subscriber, 2... Telephone office, 3 Private branch exchange (abbreviated as PBX), 4... Internal terminal device (abbreviated as extension terminal), 5... Office line control unit, 6, 15... Control section, 7゜10 Cross point 1 part, 8... OGM control section, 9... DTM
F receiver, 11...extension control section, 12... 1--
generation part, 1.3.14... data transmission part, 16...
Memory device (abbreviated as memory), 17 1/○,
18...Message lamp, 19 Message button, 20...r) TM F generator. Patent Applicant Matsushita Electric Industrial Co., Ltd. Agent Hisashi Hoshino Figure 4

Claims (1)

[Claims] In a private automatic branch exchange, an extension terminal device having a message lamp, a message button, and a memory device is used, and when a subscriber calls the extension terminal device by dial-in and is busy, the subscriber is sent a dial of his own telephone number. The system automatically sends a message requesting the above, stores the dialed telephone number in the memory device, lights up the message lamp, and presses the message button after knowing the lighting display. A private automatic branch exchange characterized in that it is configured to automatically dial a subscriber whose telephone number is stored.