JPH01320894A - Private branch exchange system - Google Patents

Abstract

PURPOSE:To quickly perform special service by transmitting and receiving digital control signals to automatically control all operations such as request for special service, response to this request, and line connection based on this response. CONSTITUTION:When the destination number is dialed and a special service stop key is operated by input parts 14 and 17 for the purpose of requesting special service, a control part 15 generates additional information. A private branch exchange transmits additional information to a called terminal when recognizing this additional information. The called terminal receives this information to recognize request of special service and notifies this recognition. When a user of the called terminal operates a key for acceptance or rejection in response to this request, response information of contents of this key is transmitted. The private branch exchange receives this information and controls line con nection between calling and called terminals in accordance with response information.

Description

[Detailed Description of the Invention] [Objective of the Invention] (Industrial Application Field) The present invention provides a private telephone switching system that allows a called party to make a special call that is selectively answered without the use of a dedicated switchboard operator. It is related to.

(Conventional technology) With the remarkable development of electronic technology and semiconductor technology, private branch exchanges have become highly functional, multi-functional systems centered on microprocessors, and in addition to the basic function of telephone exchange, they also have various service functions. has been added to the system, making it an increasingly convenient system.

Here, a conventional general private telephone system constructed using such a private branch exchange will be described below.

FIG. 6 is a block diagram showing the general configuration of a general conventional telephone, in which 1 is a handset, 2 is a communication circuit, 3 is a communication section, 4 is a dial number input section, and 5 is a control section. The telephone communication circuit 2 is provided between the handset 1 and the communication section 3, and includes a circuit for combining or separating a transmitting signal and a receiving signal. The communication section 3 is composed of an incoming call detection circuit, a reverse detection circuit, a DC loop forming circuit, a protection circuit, a dial pulse output path or a multiple frequency (DTMF) oscillation circuit, etc.
It is in charge of the interface between the terminal and the line. Telephone 8110 having such a configuration is connected to a private branch exchange via analog line 6.

Here, when attempting to make a call from the telephone IO, for example, the user operates the dial number input section 4 to input the dial number of the called telephone.

Under the control of the control unit 5 based on this operation, a dial pulse is output from the dial pulse output path in the communication unit 3,
This dial pulse is sent to the private branch exchange via analog line 6. Next, the private branch exchange learns the telephone number of the called party based on this input dial pulse, calls the telephone with that telephone number, and after confirming the telephone's response, calls the telephones of the calling and called parties. Connect them, establish a communication path, and enable communication.

FIG. 7 conceptually shows the overall configuration of a conventional private branch telephone exchange system consisting of analog lines, in which telephones 11110a and 10b having the configuration shown in FIG. 6 are connected via analog lines 6a and 6b. and is connected to the private branch exchange 11. In FIG. 7, the private branch exchange 11 is equipped with a connection section 110 that performs exchange connection control, and a call management section 111 that records call information such as a call time 1 call optical telephone number. A switchboard operator 112 is on standby to perform the work if necessary.

In such a private branch exchange system, when a call is made between extensions, the calling party normally receives the call, and unless the other party is busy, the call is automatically received by dialing the calling party's extension telephone number. Ring the bell.

Then, if the other party answers, a communication path is established.

In addition to such a normal call, an example of a procedure for using a "special call" in which the called party can select whether or not to accept the call will be described with reference to FIG. Here, "U special call" refers to a call in which the person on the called side can choose whether to accept the call after confirming the other party's name, and after the call ends, the person on the called party can choose whether to accept the call or not. It is a service that allows the called party to check call information such as number, and specific examples include:
There is a call from an ordinary employee to an executive at a company.

In this case, if a call is made from the telephone 10b to the telephone 10a, the telephone 10b of the calling party dials a specific number in the dial number input section 4 in response to the caller's request for a special call. Call switchboard operator 112 in station 1 (step 5tloo), switchboard operator 11
2 to apply for a special call (Step 5tlo1
).

Next, the operator 112 puts the telephone 10b on hold and then calls the called telephone @10a (step 5t).
102). When the telephone 10a answers this call, the operator 112 notifies the user of the telephone 1i10a that the user of the telephone 10b has applied for a special call, requests a response to this application, and requests the user of the telephone 1i10a to make a special call. Confirm whether to accept or decline the application (
Step 5t103). Note that the operation process up to this point has been performed without going through the call management section 111, and no call information has been recorded for the telephone set 10a.

Next, if the user of telephone 10a accepts the special call request from the user of telephone 10b, switchboard 112 instructs contact Rsl 10 to connect lines 6a and 6b, and calls telephone I110a. and iob. Thereafter, a conversation is made between the telephone @10a and the telephone 1ob (step 5t104). In the switching facility 1, the call management unit 111 is activated at the same time as the above-mentioned call path is established, and call information for both the calling and called parties is recorded. Thereafter, when the telephone call between the telephones m10a and 10b ends and the telephone set 10a is turned on-hook, the call information recording operation of the telephone call management section 111 is stopped.

As soon as the call ends, the lines 6a and 6b are disconnected, but the operator 112 subsequently calls only the telephone 10a again through the line 6a and notifies 10a of the call information based on the call management operation of the call management section 111 (step 5t105).

When 10a disconnects line 6a again by an on-hook operation or the like, the entire procedure of the special call ends.

In this way, in a conventional private branch telephone switching system, the calling party makes a special call application to the switchboard, waits for confirmation of the called party's acceptance of the application, and then connects the line. was supposed to start. For this reason, it takes time to apply for a special call or to confirm a response to the application, making it impossible to make a special call quickly.

(Problem to be Solved by the Invention) As mentioned above, one of the services of the private branch exchange system is "special calls." This "special call" is a service that allows the called party to choose whether or not to accept the call when a call is received. When accepted, the call management section of the private branch exchange is activated at the same time as the call path is established, The telephone number and other call information is recorded, and after the call ends, the called party's telephone is called and the call information recorded by the call management section is sent.

If you are using a multi-function phone such as an electronic key telephone, call information will be displayed as text information on the phone's LCD display, so the user of the called phone will be able to manage the call. By looking at the call information recorded and sent by the department, you can finally confirm the other party's phone number, call duration, etc.

This service is based on the premise that the caller may refuse the call due to circumstances, and the caller directly confirms acceptance of the call with the called party over the phone. done! ,
It is mentally easier for the caller, since he or she does not have to be turned down on the phone by a busy person, and the called party can easily decide whether to accept or reject the call based on their convenience. However, after the call ends, you can check the other party's phone number.

However, in order to use this service, in the case of the conventional system, it is necessary to call a switchboard one by one and have the switchboard act as an intermediary, which poses the problem of not being able to make "special calls" quickly. there were.

SUMMARY OF THE INVENTION An object of the present invention is to provide a private telephone exchange system that can automatically mediate "special calls" and quickly execute this service.

[Configuration of the Invention] (Means for Solving the Problems) In order to achieve the above object, the present invention is configured as follows. That is, a private branch telephone exchange consists of a plurality of communication terminal devices and at least one digital private branch exchange, has a control channel and a circuit switching channel for each line, and multiplexes these channels to transmit digital signals and perform circuit switching. In the system, the communication terminal device includes an information input section having a special call application key for requesting a special call application, an acceptance key and a rejection key for accepting and rejecting the request, additional information generating means for generating additional information including one's own telephone number and special call application information based on the operation of a special call application key; additional information recognition means for recognizing the additional information from information received at the time of an incoming call; The private branch exchange is provided with a notification means for notifying that there is an application for a special call based on the recognition result of the additional information recognition means, and a response information generation means for generating corresponding response information by operating the accept or reject key. Upon receiving the dial information and the additional information from the calling terminal device, the additional information is sent to the called communication terminal device, and based on the response information from the called communication terminal device, the calling side terminal and the called side It is configured by providing means for controlling the line connection with the terminal.

(Function) In such a configuration, when applying for a special call, when the caller's number is dialed and the special call application key is operated, the additional information generation means of the calling terminal device generates the additional information. occurrence, and when the private branch exchange recognizes this, it sends the additional information to the called terminal device, and in the called terminal device, the additional information recognition means recognizes the application for a special call and notifies it through the notification means. is announced and notified to the user of the called terminal device, and when the user of the called terminal device operates a key to accept or reject this, the response information generation means sends out response information corresponding to the key content. Upon receiving this, the private branch exchange controls the line connection of the calling and called terminal devices according to the response information.

As described above, according to the telephone switching system of the present invention, all operations such as special call applications, responses to the special call applications, and line connections based on the responses can be automatically performed by sending and receiving digital control signals. Because you can
You will be able to quickly make special calls through a dedicated operator.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of a telephone 100 according to the present invention, in which the handset 11°, the telephone circuit 121
Communication department 13. Dial number input section 14, control section 15. Digital floor plan M16. It consists of a special call input section 171 and a display section 18.

Of these, the telephone call circuit 12 includes a ^/D converter that converts a call signal from an analog signal to a digital signal, and a D converter that converts a received call signal from a digital signal to an analog signal.
/A converter, which converts the voice from the handset 11 into digital data and sends it to the communication section 13, and also converts the digital data from the communication section 13 into an audio signal and sends it to the handset 1.
Give to 1. The communication section 13 is composed of the digital signal superimposition/separation circuit, a data link control circuit, a line interface circuit, etc., and performs link control with a private branch exchange via the digital line 16, and controls voice data and characters from the digital line 16. Separation of data, etc., superimposition of data from the dial number input section 14 and special call input section 17 and voice data from the call circuit 12, and digital line 1
6, etc. The control section 15 plays a central role in the control of this telephone, and as shown in FIG. 2, the control section 15 consists of five functional units.

That is, a special call application additional information sending unit (hereinafter referred to as additional information sending unit) 50, which adds data in a predetermined format for special call application to data sent to the private branch exchange side when a special call is commanded; A special call application additional information recognition unit (hereinafter referred to as additional information recognition unit) 51 recognizes whether or not special call application information is added from the private branch exchange at the time of a call, and special call application information is added. a special call application notification section (hereinafter referred to as the notification section) 52 that displays this information on the display section 18; , abbreviated as response information sending unit) 53, and an overall control unit 54 that controls various controls of the entire telephone set.The control unit 15 is centered on a microprocessor, and each functional unit is realized by a software module. Ru.

Further, the dial number input section 14 has a dial keypad, and inputs "On" to "9", "l*l".

A code corresponding to a key such as "#'" is given to the control unit 15. Further, the special call input section 17 has keys for applying for, accepting, and rejecting special calls, and these can be given to the control section 15 with a single key operation. In addition, the display section 18
is a display device that can display characters using liquid crystal, etc.
The display is controlled via the control unit 15 to display characters.

Now, when making a call from the telephone 100, the user inputs the telephone number of the called party's telephone by operating the dial number input section 14. As a result, the control unit 15 outputs number data corresponding to the dialed number,
This number data is sent from the communications department 13 to the digital premises line 1.
6 and is transmitted to a private branch exchange (digital exchange). Here, the digital exchange calls the telephone 100 of the called party based on the received number data as described above, and after confirming the response of this telephone, calls the telephone of the calling party and the telephone of the called party via the digital private line 16. Connect-14= and establish a communication path.

Thereafter, digital signals can be exchanged between the telephones on the calling side and the called side, and a conversation can be made.

Consider a case where a special call is made in such a system. FIG. 3 conceptually shows the overall configuration of the private branch exchange system of the present invention, in which telephones 100A and 100B having the configuration shown in FIG. 81120. This private branch exchange 120 is basically the same as the one explained in FIG. 7, but uses digital lines, and each line has a control channel and a circuit switching channel, and these channels are multiplexed. In addition, when a "special call" is accepted, the call management section 121 connects with the connection section 124 to record the call information, and after the end of the call, it records the call information. It has the function of sending recorded information to the called telephone.

To explain in more detail, in Figure 3, private branch exchange 1
20 consists of a connection section 124 and a call management section 121, and connects the telephone 1 through a call signal path 122 and a data signal path 123.
Performs exchange connection control between 00A and 100B.

Here, the speech signal path 122 and the data signal path 123 are combined into one transmission path in the connecting section 124, and the speech signal path 122 is used for transmitting the digital speech signal, and the data transmission path 123 is used for the transmission of the digital speech signal. It is used to transmit data signals other than signals, such as telephone call data signals.

The connection unit 124 recognizes the "number data of the called side phone" and the "special call application additional information" sent from the calling side phone, and based on the recognition result, connects the phone with the called side phone. After connecting the digital line, a function that sends "calling party phone number data j" and "special call application additional information" corresponding to the calling party's telephone to the called party's telephone;
When receiving a signal to accept a "special call" from the called party's telephone, a call path is formed using the called party's off-hook information to enable the call, and the call management unit 121 records the communication information, and the call is made on-hook. When the end of the call is detected, the call management unit 121 ends the recording, disconnects only the line of the calling side telephone, and disconnects the line of the called side telephone from the private branch exchange 120.
The call management section 1 is then connected to the called party's telephone.
21, the recorded communication information between the telephones is read out and sent, and then the line is disconnected.

Furthermore, when the connection unit 124 receives information indicating a rejection of an application for a "special call", it is provided with a function of sending a call rejection message to the calling party and disconnecting the line.

In the private branch exchange system having such a configuration, the operation when making a "special call" from telephone tl 1100B to 10OA will be described with reference to FIG.

First, in the telephone 100B, when a request for a special call is generated, the user presses the special call "application key" in the special call input section 17.
, then operate the dial number input section 14, and then select the telephone 100 to which you are applying for a special call (called party).
Enter A's phone number. Based on this operation, the control unit 15
automatically performs a calling operation, and receives "number data of the called side telephone" outputted in a predetermined format from the overall control section 54 in the control section 15, and "special data" outputted from the additional information sending section 50. Call application additional information (for example, a special call application code and the preset name of the user of the telephone 100B) is sent to the exchange 120 through the communication unit 13 and the digital line 16B (step 5t20 in FIG. 4). At this time, the telephone 100B and the private branch exchange 120 are connected through a path of telephone 100B-digital line-connection section 124.

Next, in the exchange 120, the connection section 124 is connected to the telephone 1110.
"Number data of the called side telephone" sent from 0B and "
After connecting the digital line 16A with the called party's telephone Ill OOA based on the recognition result, the "calling telephone number data" corresponding to the telephone 100B is recognized. and "special call application additional information" are sent to telephone 100A.

The "calling side telephone number data" and "special call application additional information" transmitted from the private branch exchange 120 in this manner are received by the control section 15 via the communication section 13 of the telephone 100A. .

Next, in the control unit 15 of the telephone fllloOA, the additional information recognition unit 51 recognizes each data, and based on the recognition result, the display unit 18 is controlled by the notification unit 52.
For example, [Mr. B (or number 0000) has requested an emergency call. Would you like to accept it? A message such as J is displayed to notify that there is an application for a special call from telephone 100B (step 5t21). At this time, the telephone 100A and the private branch exchange 120 are
They are connected through a path from 00A to digital line 16A to connection section 124.

The user of the called telephone 100A, who receives the notification of "Special call application available" displayed on the display 18, then presses the special call input section 1 depending on whether or not to accept the special call.
7. Select the "Accept J" button or the "Reject" button. If the "accept" button is pressed here, the control unit 15
Inside, the response information sending unit 53 outputs response information (digital data signal) indicating that the special call will be accepted, and the response information is transmitted from the communication unit 13 to the calling side telephone 100B via the private branch exchange 120. (Step 5t22),
Thereafter, when the user performs an off-hook operation on the telephone 100A, the control unit 15 sends the message to the private branch exchange 12 in response to this operation.
Off-hook information is transmitted to 0, a call path is connected under the control of private branch exchange 120 based on this information, and recording of call information is started (step 5t23). At this time, both a call signal path 122 and a data signal path 123 are established between the telephone fliroOA, 100B and the private branch exchange 120, and the telephone 11i100A-digital line 1 is connected to the telephone 11i100A-digital line 1, respectively.
6A-Connection section 124-Digital line 16B-Telephone 1
00B and a path from telephone #11100^-digital line 16A-connecting section 124-call management section 121-digital line 16B-telephone 100B.

After that, when the call ends and the telephone 100A performs an on-hook operation, the telephone 100A sends the phone to the private branch exchange 120.
Information about the end of the call is transmitted to the corresponding exchange 1'2.
Recording of call information by 0 is stopped. At this time, in the exchange 120, the call signal path 122 for the telephone 1100A is
is disconnected, but data signal path 123 remains connected. Subsequently, the private branch exchange 120 transmits the call information record to the telephone 100A through the data signal path 123 (step 5t24).

On the other hand, in the telephone 1!1loOA, after receiving the call information record and displaying it on the display section 18, the entire procedure of the special call ends. Note that if the application for a special call is "rejected", the private branch exchange 120 issues "rejection" information to the calling party, so the calling party's telephone 100B is controlled by the control unit 15 to accept the request for a special call. A message such as "Application has been rejected" is displayed on the display section 18. This allows you to know the rejection.

FIG. 5 shows an example of the transmission format of various information in a special call carried out according to the procedure described above. Figure 5(a) shows the special call application operation (step 5).
This shows the format of the transmission information in t20),
From the telephone 100B on the calling side to the exchange 120, "
``Number data of the called side telephone (ioOA)'' and special call application additional information'' are transmitted. Further, FIG. 5(b) shows the response operation to the special call application (step 5).
t22), which shows the format of the transmitted information in
``Response information for the special call request'' corresponding to either ``acceptance'' or ``rejection'' is transmitted. In this case, depending on the communication protocol with the private branch exchange 120, the above-mentioned "response information" may include "calling side telephone, (100B
)' or 'the number data of the called telephone (100A)' may be added.

As described above, this system includes an information input section having a special call application key for requesting a special call application, an acceptance key and a rejection key for accepting and rejecting the request, and an information input section having a special call application key for requesting a special call application, and an information input section having the special call application key for accepting and rejecting the request. additional information generating means for generating additional information including one's own telephone number and special call application information based on key operations; additional information recognition means for recognizing the additional information from information received at the time of an incoming call; A communication terminal device is provided with a notification means for notifying that there is an application for a special call based on the recognition result of the means, and a response information generating means for generating corresponding response information by operating the accept or reject key. Upon receiving the dial information and the additional information from the terminal device, the additional information is sent to the called communication terminal device, and the line between the calling side terminal and the called side terminal is established based on the response information from the called communication terminal device. This is configured by providing a means for controlling connections in a private branch exchange.

When applying for a special call, when you input the other party's number and press the special call application key, the additional information generation means of the calling terminal device generates additional information, and when the private branch exchange recognizes this, the called party The additional information is sent to the terminal device, and in the called terminal device, the additional information recognition means recognizes the special call application and notifies the user of the called terminal device. When the user of the called terminal device presses a key to accept or reject the notification, the response information generating means sends response information corresponding to the key content, and the private branch exchange that receives this responds in response to the response information. This system is designed to control line connections for calling and receiving terminal devices.

Therefore, according to this telephone switching system, all operational controls such as special call applications, responses to the special call applications, and line connections based on the responses can be automatically performed by sending and receiving digital control signals. It becomes possible to quickly make a special call without going through a dedicated operator.

It should be noted that the present invention is not limited to the embodiments described above and shown in the drawings, but can be implemented with appropriate modifications within the scope of the invention.

[Effects of the Invention] As described above in detail, according to the telephone switching system of the present invention, all operational controls such as special call applications, responses to the special call applications, and line connections based on the responses are performed using digital control signals. Since this can be done automatically by sending and receiving a special call, it becomes possible to quickly make a special call without the need for a dedicated operator.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of a communication terminal device according to the present invention, FIG. 2 is a block diagram showing a detailed configuration of the control unit 5 in the telephone shown in FIG. 1, and FIG. FIG. 4 is a block diagram conceptually showing the overall configuration of such a telephone switching system, FIG. 4 is a diagram showing the operating procedure when applying for a special call in the telephone switching system of the present invention, and FIG. A conceptual diagram illustrating an example of the information format sent when applying for a call and responding to the application;
Fig. 6 is a block diagram showing the configuration of a conventional telephone set, Fig. 7 is a block diagram conceptually showing the overall structure of a conventional telephone switching system, and Fig. 8 is an operational procedure during a special call in the conventional telephone switching system. FIG. 11...Telephone receiver, 12...Telephone circuit, 13...
Communication unit, 14...Dial number input unit, 15...Control unit, 50.51, 52, 53.54...Control module, 16...Digital private line, 17...Special call input Part, 18...Display part, 100.100A,
100B... Telephone 1l11 (or communication terminal device), 120... Private branch exchange, 121... Call management section, 112... Switchboard operator, 122... Call signal path, 12
3...Data signal path, 124...Connection section. Applicant's representative Patent attorney Takehiko Suzue In Figure 2 and Figure 1, O

Claims (1)

[Claims] In a private branch telephone switching system consisting of a plurality of communication terminal devices and at least one digital private branch exchange, each line has a control channel and a circuit switching channel, and these channels are multiplexed to transmit digital signals and perform circuit switching. , the communication terminal device includes an information input section having a special call application key for requesting a special call application, and an acceptance key and a rejection key for accepting and rejecting the request; additional information generating means for generating additional information including one's own telephone number and special call application information based on the operation of an application key; additional information recognition means for recognizing the additional information from information received at the time of an incoming call; and this additional information. A notification means for notifying that there is an application for a special call based on the recognition result of the recognition means, and a response information generation means for generating corresponding response information by operating the accept key or the rejection key, and the private branch exchange Upon receiving the dial information and the additional information from the telephone terminal, the terminal sends the additional information to the called communication terminal, and based on the response information from the called communication terminal, the calling terminal and the called terminal What is claimed is: 1. A private telephone exchange system characterized in that it is configured by providing means for controlling line connection with the private telephone exchange system.