JPH06245242A - Automatic private branch exchange - Google Patents

Abstract

PURPOSE:To attain communication in a D channel between a data terminal equipment and a private branch of automatic exchange by providing an event discrimination means and an event conversion means in a digital telephone set. CONSTITUTION:A terminal interface means 15 of a digital telephone set 3 makes data transmission reception with a data terminal equipment connected via an RS-232C input output port. An event discrimination means 19 analyzes a D- channel frame sent/received with a master set 1 of an automatic private branch exchange to control a path of the Dchannel frame to be transmitted/received. An event conversion means 20 converts data sent from the data terminal equipment into a call control event and converts the call control event into data to be sent to a data terminal equipment. Thus, the digital telephone set 3 transmits the event received from the master set 1 through a D-channel. Furthermore, received data from the data terminal equipment are transmitted as an event to the master set 1 through the D-channel.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to data transmission / reception in a private automatic branch exchange having an RS-232C input / output port and accommodating a digital telephone connected through a digital transmission line.

[0002]

2. Description of the Related Art FIG. 5 is a block diagram showing a system configuration of a conventional private automatic branch exchange. The private automatic branch exchange is roughly divided into three control units: a main unit, an extension control unit, and a digital telephone. In FIG. 5, 101 is a main unit that controls the entire system, and 102 is a unit that is provided to distribute the load of the main unit 101, and is an extension control unit that transmits and receives D channel frames to and from a plurality of digital telephones. Is. Reference numeral 103 denotes a digital telephone connected to the extension control device 102 through a 2B + D interface. For example, the extension control device is 2B + D, that is, two B channels having a transmission rate of 64 Kbps and one D channel having a transmission rate of 16 Kbps. The B channel can transmit user information such as voice or data, and the D channel can transmit control information necessary for the exchange process.

In the main unit 101, 104 is a communication path connecting means for connecting the extension channels to each other on the B channel, and 105 is a call control event for exchanging a call control event with the digital telephone 103 through the D channel to perform call control such as state transition of the extension. The call control means 106 for performing is an extension interface means for controlling an interface with the extension control device 102 and for transmitting and receiving a D channel frame with the extension control device 102. In the extension control device 102, 107 is an extension control means for allocating the D channel frame received from the call control means 105 via the extension interface means 106 to each digital telephone 103 according to the destination of the frame, and 108 is an interface with the digital telephone 103. It is a telephone interface unit that controls and transmits / receives data to / from the digital telephone 103.

In the digital telephone 103, 109 is a receiver for making a voice call, 110 and 111 are speakers and a microphone for making a hands-free voice call, 112 is an operating means including a dial button and a hook switch, and 113 is Display means such as an LED (light emitting diode) or LCD (liquid crystal display device), and 114 are communication interface means for communicating with the private automatic branch exchange. Reference numeral 115 denotes a terminal interface means for transmitting / receiving data to / from a data terminal connected via the RS-232C input / output port, and 116 denotes a low speed transmission / reception with a data terminal connected via the terminal interface means 115. It is a speed conversion means for performing mutual speed conversion for transmitting data on the B channel of 64 Kbps. 117 is a handset for making voice calls and data communications 1
09, speaker 110, microphone 111, communication interface means
A call path control means for enabling the B channel connection between the 114 and the speed conversion means 116, and a telephone control means 118 for controlling the operation means 112, the display means 113, the terminal interface means 115 and the call path control means 117.

The operation of the conventional private automatic branch exchange having the above-mentioned components when a voice-based transmission operation is performed will be described. When the user of the digital telephone 103 goes off-hook, the telephone control means 118 notifies the operation means 1
Detect via 12. The telephone control means 118 transmits the off-hook event in the D channel frame to the telephone interface means 108 in the extension controller 102 via the communication interface means 114. Telephone interface means 108 that has received the off-hook event
Transmits an off-hook event to the extension control means 107 in a D channel frame, and the extension control means 107 adds information on which telephone set the frame is from to the main channel 101. Upon receiving the D channel frame via the extension interface means 106 in the main device 101, the call control means 105 changes the state of the telephone from waiting to listening to the dial tone, and the user of the telephone receives the dial tone from the handset 109. Extension interface means for events including control information such as B channel connection information for listening to, and LED information for controlling display means such as LED and LCD, LCD information.
Send to 106. The extension interface means 106 transmits the received event to the extension control means 107 in the extension control device 102, and the extension control means 107 which has received the event follows the destination telephone interface means 108 according to the destination telephone included in the D channel frame. To the D channel frame. The telephone interface means 108 transmits to the telephone control means 118 via the communication interface means 114 in the digital telephone 103 through the D channel frame. Various control information (B channel connection information, LE
The telephone control means 118 which has received (D information, LCD information)
It controls the communication path control means 117 and the display means 113 to send a dial tone to the user, and also controls the LED and LC.
Display D. When the user who listens to the dial tone performs a dial operation to call the other party, the telephone control means 118 detects it via the operating means 112 in the same manner as described above, and the communication interface means 114-telephone interface means 108. -Extension control means 107-Call control means 10 in the main device 101 via extension interface means 106
The dial event is sequentially transmitted to 5. Upon receiving the dial event, the call control means 105 analyzes the dial and performs the calling process of the other party. When the calling party answers, the LCD information for displaying the fact on the LCD is displayed by the extension interface means 106-extension control means 107-telephone interface means 108-communication interface means 1
Telephone control means 1 in the digital telephone 103 via 14
Transmit to 18. Upon receiving the LCD information, the telephone control means 118 controls the display means 113 to display a message on the LCD. As described above, the voice call on the B channel becomes possible.

Next, the operation of automatic transmission of the data system will be described. When the user of the data terminal performs a calling operation (for example, an ATD command in the AT command system) to the intended party, the telephone control means 118 detects this via the terminal interface means 115. The telephone control means 118 receives the call control means 105 in the main unit 101 via the communication interface means 114 as in the case of the voice system.
In response, the transmission event of the data terminal is transmitted on the D channel. Call control means that received the originating event
The 105 analyzes the outgoing event and performs the calling process of the partner data terminal. When the calling party answers, B for transmitting data on the B channel between the data terminals
The channel connection information is transmitted to the digital telephone 103. Communication interface means 1 in digital telephone 103
The telephone control means 118 which has received the B-channel connection information via 14 controls the call path control means 117 to be referred to as communication interface means 114-call path control means 117-speed conversion means 116-terminal interface means 115. A path is formed to enable data communication on the B channel between data terminals. In addition to the above-mentioned calling method, there is also a method of making a call from the data terminal on behalf of it by operating the operation means 112 of the digital telephone (proxy call).

As described above, in the conventional private automatic branch exchange, only the control information necessary for the exchange processing is transmitted on the D channel, and the user information such as voice or data is transmitted on the B channel only from end to end. .

[0008]

In recent years, the performance of various terminals including a personal computer connected to the RS-232C input / output port of a digital telephone has improved. In addition, users can easily develop applications on the terminals, and the applications installed on the terminals are becoming rich. However, in the above-mentioned conventional private automatic branch exchange, the data from the data terminal is transmitted only on the B channel, and only the end-to-end data communication function is provided. That is, there is a problem that there is no link between the data terminal and the application installed in the main device, and, for example, the data terminal cannot control voice communication at all. The present invention solves the above-mentioned conventional problems, and an object of the present invention is to provide a private automatic branch exchange capable of communicating between a data terminal and a private automatic branch exchange.

[0009]

In order to achieve the above object, the present invention manages an interface between a call control means for controlling a call such as a connection between extension lines and a connection between extension lines and an extension line control device. A main unit including an extension interface unit for transmitting and receiving data to and from the main unit, an extension control unit for controlling transmission and reception of control information between the main unit and the digital telephone, and an interface with the digital telephone for controlling the data with the digital telephone. An extension control device having a telephone interface unit for transmitting and receiving data, and at least one RS-232C input / output port, which are connected to the extension control device through an interface consisting of at least one B channel and D channel. Communication interface for B channel communication and D channel communication with Terminal means for controlling the input / output of data to / from the terminal connected via the RS-232C, a telephone control means for controlling the operation portion and the display portion of the telephone, the communication interface means, Event discrimination means for controlling the transmission / reception path of the D channel frame between the terminal interface means and the telephone control means, and event conversion means for converting the contents in the frame of the D channel frame between the communication interface means and the terminal interface means. And a digital telephone set including.

[0010]

With the above-described structure of the present invention, in the private branch exchange, the digital telephone can send the event received from the main unit through the D channel to the data terminal, and receive the data from the data terminal. It acts on the main unit so that it can be sent as an event through the D channel. Therefore, the operation of the voice system of the digital telephone is controlled by operating the data terminal, and conversely, the voice control data transmitted from the main unit is also sent to the data terminal, and the system is displayed on the screen of the data terminal. It is possible to provide a very convenient service to the user of the digital telephone, such as being able to display the entire operation status.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A private automatic branch exchange according to an embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing a system configuration of a private branch exchange according to an embodiment of the present invention.
FIG. 2 is a sequence flow when a voice transmission is performed from the data terminal, FIG. 3 is a configuration of a D channel frame transmitted / received in the private automatic branch exchange, and FIG. 4 is from a call control event in the event converting means to the data terminal. 3 shows conversion tables when converting data to be transmitted to the call control data and converting data from the data terminal to a call control event.

Similarly to the conventional example, the private automatic branch exchange is roughly divided into three control units, that is, a main unit, an extension control unit and a digital telephone. In FIG. 1, reference numeral 1 is a main unit that controls the entire system, and 2 is provided to distribute the load on the main unit 1. An extension that transmits and receives D channel frames to and from a plurality of digital telephones 3. The control device 3 is a digital telephone connected to the extension control device 2 through a 2B + D interface. For example, the extension control device is 2B + D, that is, two B channels having a transmission rate of 64 Kbps and one transmission rate of 16 Kbps. It is connected to the D channel, user information such as voice or data can be transmitted on the B channel, and control information necessary for the exchange process is transmitted on the D channel.

In the main unit 1, 4 is a communication path connecting means for connecting the extension channels to each other on the B channel, and 5 is a channel control means for exchanging call control events with the digital telephone 3 through the D channel to perform call control such as state transition of the extension. The call control means 6 for performing is an extension interface means for controlling the interface with the extension control device 2 and for transmitting and receiving the D channel frame with the extension control device 2. In the extension control device 2, 7 is an extension control means for allocating the D channel frame received from the call control means 5 via the extension interface means 6 to each digital telephone 3 according to the destination of the frame, and 8 is for the digital telephone 3. It is a telephone interface unit that controls the interface and transmits / receives data to / from the digital telephone 3.

In the digital telephone 3, 9 is a handset for making a voice call, 10 and 11 are speakers and a microphone for making a hands-free voice call, 12 is an operating means including a dial button and a hook switch, and 13 is Display means such as an LED or LCD, and 14 is a communication interface means for communicating with the private automatic branch exchange. 15 is RS-232
A terminal interface means for transmitting / receiving data to / from a data terminal connected via the C input / output port, 16 denotes low-speed data transmitted / received to / from a data terminal connected via the terminal interface means 64 at 64 Kbps. Speed conversion means for performing mutual conversion of speeds for transmission on the B channel, and 17 for the handset 9, speaker 10, microphone 11 and communication interface means 14 for voice communication and data communication.
And a communication path control means for enabling the B channel connection between the speed conversion means 16 and the operation means 12 and the display means 18.
13, terminal interface means 15 and speech path control means 17
Is a telephone control means for controlling. Reference numeral 19 is an event discriminating means for analyzing the D channel frame transmitted / received to / from the private automatic branch exchange and controlling the route of the D channel frame to be transmitted / received, and 20 is data sent from the data terminal as a call control event. Event conversion means for converting a conversion or call control event into data for sending to a data terminal. In FIG. 3, reference numeral 50 denotes an extension identifier section for identifying the destination or transmission source extension of the D channel frame, and 51 is a terminal for identifying whether the destination or transmission source of the D channel frame is a telephone or a data terminal. An identifier section, 52 is an event type section in which the event type of a call control event is stored, and 53 is an event information section in which event parameters and the like are stored.

In the private automatic branch exchange of the present embodiment having the above-described components, the operation of the private automatic branch exchange when a voice system transmission operation is performed from the data terminal will be described with reference to FIGS. 4 will be described. When the user of the data terminal makes a voice call operation to extension number 100 by the application installed in the data terminal (step 10 (S10)), the data "ATDV100" is sent from the data terminal to the terminal interface means 15. It is sent to the event conversion means 20 via (S11). The event converting means 20 forms a D channel frame, converts the data "ATDV100" into a call control event "call request" according to the event conversion table of FIG. "Request", "100" is set in the event information section 53, and is transmitted to the event discriminating means 19.
The event discriminating means 19 indicates to the terminal identifier section 51 that the D channel transmission source is a data terminal.
51 is set to 1, and the D channel frame is multiplexed via the communication interface means 14 to the extension controller 2
To (S12). Extension control means 7 which has received the D channel frame via the telephone interface means 8.
Sets the extension identifier section 50 indicating which telephone is the D channel transmission source, and transmits the D channel frame to the main device 1 (S13). The call control means 5 which has received the D channel frame via the extension interface means 6 starts calling the partner telephone, that is, extension number 100.
(S14), a D channel frame is formed to notify the digital telephone 3 and the data terminal that the calling of the other party has started. The extension identifier section 50 and the terminal identifier section 51 of the D channel frame respectively copy the corresponding identifiers of the D channel frame "call request" received earlier, and set "call request response" in the event type section 52, The D channel frame is transmitted to the extension control device 2 via the extension interface means 6 (S15). The extension control means 7 which has received the D channel frame D
It is passed to the telephone interface unit 8 of the corresponding telephone according to the extension identifier section 50 of the channel frame. The telephone interface unit 8 transmits the passed D channel frame to the digital telephone 3 (S16). The event discriminating means 19 which has received the D channel frame via the communication interface means 14 determines the terminal identifier part of the D channel frame.
Referring to 51, since the destination is the data terminal, the D channel frame is transmitted to the event converting means 20. The event conversion means 20 converts the "call request response" event into data "RING" according to the conversion table of FIG. 4, and transmits it to the data terminal via the terminal interface means 15 (S17). The data terminal which has received the data "RING" switches the screen to the display for calling the other party (S18). At the same time as the transmission of the "call request response" event of S15, the call control means 5 transmits the "speaker microphone control" event to the extension telephone via the extension interface means 6 in order to make the calling telephone hear the calling sound of the other party. It is transmitted as a D channel frame to the extension control means 7 of the control device 2 (S19). However, since the destination of the event at this time is the telephone, the terminal identifier portion 51 of the D channel frame
Is set to 0, which represents a telephone. The "speaker microphone control" event is passed from the extension control means 7 to the communication interface means 14 of the digital telephone 3 and the event discrimination means 19 via the telephone interface means 8 (S2).
0). The event discriminating means 19 refers to the terminal identifier section 51, and since the destination is a telephone, the event is discriminated by the telephone controlling means.
Pass to 18. The telephone control means 18 controls the communication path control means 17 so that the calling sound of the other party can be heard from the speaker 10.

Next, when the call control means 5 of the main unit 1 detects that the other party's telephone has responded (S30), the call control means 5 controls the call path connecting means 4 to establish a call path between the two telephones. Then, as in the case of transmitting the "call request response" event, the "connection notification" event is transmitted to the digital telephone 3 in the D channel frame (S31, S32). Upon receiving the "connection notification" event, the event converting means 20 of the digital telephone 3 converts the data into "CONNECT" data and transmits the data to the data terminal in the same manner as above (S33).
Then, the data terminal switches the display to the display during a call (S3
Four). When disconnecting the call by operating the data terminal
(S35), the data "ATH" is sent from the data terminal to the event conversion means 20 via the terminal interface means 15 (S36). The event conversion means 20 uses the “A
As in the case of receiving the "TDV100" data, referring to the event conversion table, the "ATH" data is converted into a call control event called "termination notice", and the event discrimination means 19-communication interface means 14-telephone interface means 8
-Extension control means 7-Sending to the call control means 5 via the extension interface means 6 (S37, S38). Upon receiving the "end notification" event, the call control means 5 controls the call path connection means 4 to disconnect the call path.

As described above, according to this embodiment, the extension control means and the event discriminating means are arranged so as to control the route of the D channel frame, and the event converting means is so arranged as to control the event conversion within the D channel frame. Since it has been arranged, the data from the data terminal is converted, and D
Depending on the channel, it can be transmitted to the private automatic branch exchange, and the D channel frame from the private automatic branch exchange can be converted and transmitted to the data terminal.

[0018]

As is apparent from the above embodiment, according to the present invention, the digital telephone has the event discriminating means and the event exchanging means, so that the data received from the data terminal can be sent to the private automatic branch exchange. The data can be transmitted on the D channel, and the data received on the D channel from the private branch exchange can be transmitted to the data terminal. Therefore, if an application is installed on the data terminal and the application program converts the operation on the data terminal into data that can be interpreted by the private automatic branch exchange and sends it, the operation of the voice system of the digital telephone is controlled by the operation from the data terminal. It can be done easily. Further, if voice control data transmitted from the private branch exchange to the digital telephone is also sent to the data terminal, for example, an application program on the data terminal displays the usage status and operation status of the extension telephone on the screen. It will be possible. As described above, according to the present invention, it is possible to provide a very convenient service to the user of the digital telephone or the data terminal connected to the digital telephone.

[0019]

[Brief description of drawings]

FIG. 1 is a block diagram showing a system configuration of a private automatic branch exchange according to an embodiment of the present invention.

FIG. 2 is a sequence flow showing an outline of processing when a voice system is originated from a data terminal in one embodiment of the present invention.

FIG. 3 is a configuration diagram of a D channel frame transmitted in a private branch exchange according to an embodiment of the present invention.

FIG. 4 is a diagram showing a conversion table between data of a data terminal and a call control event in the event converting means in the digital telephone according to the embodiment of the present invention.

FIG. 5 is a block diagram showing a system configuration of a conventional private automatic branch exchange.

[Explanation of symbols]

1, 101 ... Main device, 2, 102 ... Extension control device, 3, 10
3 ... Digital telephone, 4, 104 ... Call path connection means,
5, 105 ... Call control means, 6,106 ... Extension interface means, 7,107 ... Extension control means, 8,108 ... Telephone interface means, 9,109 ... Handset, 10,110 ... Speaker, 11,111 ... Microphone, 12,112 ... Operating means,
13, 113 ... Display means, 14, 114 ... Communication interface means, 15, 115 ... Terminal interface means, 16, 116 ...
Speed conversion means, 17,117 ... Speech path control means, 18,118
… Telephone control means, 19… Event discrimination means, 20… Event conversion means.

Claims (1)

[Claims] 1. A main unit comprising call control means for controlling calls such as connection between extension lines and connection between extension lines, and extension interface means for controlling an interface with the extension control device and for transmitting / receiving data to / from the extension control device. An extension control device including an apparatus, an extension control unit that controls transmission / reception of control information between the main unit and a digital telephone, and a telephone interface unit that controls an interface with the digital telephone and transmits / receives data to / from the digital telephone. , Having at least one RS-232C input / output port,
Connected to the extension control device through an interface consisting of at least one B channel and D channel;
RS-23, a communication interface unit for performing B channel communication and D channel communication with the extension control device.
2C, a terminal interface means for controlling input / output of data to / from a terminal, a telephone control means for controlling an operation unit and a display unit of a telephone, the communication interface means, the terminal interface means, the A digital telephone comprising: an event discriminating means for controlling a transmission / reception path of a D channel frame between the telephone control means; and an event converting means for converting a content in a D channel frame between the communication interface means and the terminal interface means. And a data terminal for converting an event in a D channel frame sent from the call control means of the main unit via the extension control device by the event conversion means in the digital telephone. Converted to data for transmission to and back Converting the event for call control by the event converting means data sent from the youngest, D
A private automatic branch exchange characterized by transmitting as a channel frame to the call control means of the main unit.