JP3297114B2 - Private automatic exchange system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention has a digital telephone and a data terminal connected by a digital transmission line,
The present invention relates to a private branch exchange system for transmitting and receiving data.

[0002]

2. Description of the Related Art In recent years, a digital telephone RS-232 has been developed.
The performance of various terminals including a personal computer connected to a C input / output port has been improved. Also,
Users can easily develop applications on terminals, and applications mounted on terminals are also becoming rich.

FIG. 8 is a block diagram showing a system configuration of a conventional private branch exchange. In FIG.
The dotted line connection indicates the path of B channel information, and the chain line connection indicates the path of D channel information. In FIG. 8, the private branch exchange is roughly divided into three control units: a main unit 1, an extension control unit 2, and a digital telephone 3. The main unit 1 controls the entire system, and the extension control unit 2 is provided for distributing the load of the main unit, and transmits and receives D channel frames to and from a plurality of digital telephones. The digital telephone 3 is connected to the extension control device 2 through a 2B + D interface. For example, the extension control device 2 is 2B + D, that is, 64 Kbp.
It is connected by two B channels having a transmission speed of s and one D channel having a transmission speed of 16 Kbps. The B channel can transmit user information such as voice or data, and the D channel contains control information necessary for exchange processing. Transmitted.

[0004] In the main unit 1, the communication path connecting means 4
Performs the connection processing of the B channels between the extensions. The call control means 5 is connected to the digital telephone 3 through the D channel.
, And call control events such as state transition of the extension. Further, the extension interface means 6 (6
a), 6b...) control the interface with the extension control device 2 and transmit and receive the D channel frame to and from the extension control device 2.

In the extension control unit 2, the extension control means 7 distributes 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. The telephone interface means 8 (8a, 8b,...) Controls an interface with the digital telephone 3 and transmits and receives data to and from the digital telephone 3.

Further, the digital telephone 3 has a receiver 9 for making a voice call, a speaker 10 and a microphone 11 for making a hands-free voice call, and the operating means 12 comprises a dial button, a hook switch and the like. The display means 13 has a display unit such as an LED or an LCD. The communication interface means 14
Manages communication with the private branch exchange. Further, the terminal interface means 15 controls data transmission / reception to / from a data terminal connected via an RS-232C input / output port. Furthermore, the speed conversion means 16 performs mutual conversion of the speed in order to transmit low-speed data transmitted / received to / from a data terminal connected via the terminal interface means 15 on a 64 Kbps B channel. Further, the communication path control means 17 to which the receiver 9, the speaker 10 and the microphone 11 are connected is connected to the communication interface means 14 and the speed conversion means 16, and the receiver 9, the speaker 10 and the microphone 11 are used for voice communication and data communication. Enables a B channel connection between the communication interface means 14 and the speed conversion means 16. Further, the telephone control means 18 includes the operation means 12, the display means
13, terminal interface means 15 and communication path control means 17
Control.

First, an operation when a voice-based transmission operation is performed according to the above configuration will be described. When the user of the digital telephone goes off-hook, the telephone control means 18 detects this via the operation means 12. Telephone control means
Numeral 18 transmits an off-hook event to the telephone interface means 8 in the extension control device 2 via the communication interface means 14 in a D channel frame. Upon receiving the off-hook event, the telephone interface means 8 transmits the off-hook event to the extension control means 7 in a D-channel frame, and the extension control means 7 adds information on which telephone the frame came from to the D-channel frame. To the main device 1. This D channel frame is transferred to the extension interface means 6 in the main unit 1.
The call control means 5 receives the B-channel connection information for allowing the telephone user to hear the dial tone from the handset 9, and changes the state of the telephone from standby to listening to the dial tone. An event including control information such as LED information and LCD information for controlling the display means 13 such as an LCD is transmitted to the extension interface means 6. The extension interface means 6 transmits the received event to the extension control means 7 in the extension control device 2, and the extension control means 7 which has received the event, in accordance with the destination telephone included in the D channel frame, sets the desired telephone interface means. 8 to transmit a D channel frame. The telephone interface means 8 transmits to the telephone control means 18 via the communication interface means 14 in the digital telephone 3 through the D channel.

When the user who has listened to the dial tone performs a dial operation to call the other party, the telephone control means 18 detects this through the operation means 12, and the communication interface means 14 transmits the telephone interface means 8 to the telephone interface means 8. , The dial event is sequentially transmitted to the call control means 5 in the main unit 1 via the extension control means 7 and the extension interface means 6. Upon receiving the dial event, the call control means 5 analyzes the dial and performs a calling process of the other party. When the called party answers, the LCD information for displaying the fact on the LCD is transmitted from the extension interface means 6 to the extension control means 7, the telephone interface means 8 and the telephone control means in the digital telephone 3 via the communication interface means 14. Transmit to 18. This LC
The telephone control means 18 having received the D information controls the display means 13 to display a message on the LCD. As described above, the voice communication on the B channel becomes possible.

Next, the operation when the automatic transmission of the data system is performed will be described. When the user of the data terminal performs a call operation (for example, an ATD command in the AT command system) to a target party, the telephone control means 18 detects this via the terminal interface means 15. Telephone control means 18 via communication interface means 14,
As in the case of the voice system, the transmission event of the data terminal is transmitted to the call control means 5 in the main apparatus 1 through the D channel. The call control means 5, which has received the transmission event, analyzes the transmission event and performs a calling process of the partner data terminal. When the called party answers, the B-channel connection information for performing data transmission on the B-channel between the data terminals is transmitted to the digital telephone 3. Telephone control means 18 having received the B-channel connection information via the communication interface means 14 in the digital telephone 3
Controls the communication path control means 17 to form a path from the communication interface means 14 to the communication path control means 17, the speed conversion means 16, and the terminal interface means 15 to enable data communication on the B channel between data terminals. I do.

As described above, in the conventional private 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 only between the end and the end on the B channel. .

In addition to the above-mentioned transmission method, there is also a method in which the transmission from the data terminal is performed by operation of the operating means 12 of the digital telephone (proxy transmission).

[0012]

However, in the above conventional configuration, data from the data terminal is transmitted only on the B channel, and only the data communication function between the end and the end is provided. That is, there is no link between the data terminal and the application installed in the main device 1, and for example, there is a problem that control relating to a voice call cannot be performed from the data terminal at all.

An object of the present invention is to solve the above-mentioned conventional problems, and an object of the present invention is to provide a private branch exchange system capable of communicating between a data terminal and a private branch exchange.

[0014]

In order to solve the above-mentioned problems, an automatic private branch exchange system according to the present invention is provided with a main unit having call control means for controlling calls such as connection between extensions and between internal and external lines. An extension control device having extension control means for controlling transmission and reception of control information between the main device and the plurality of digital telephones is provided, and has at least one input / output port,
The extension controller is connected to an interface comprising at least one B channel and D channel,
Communication interface means for controlling B-channel communication and D-channel communication with the extension control device; terminal interface means for controlling data input / output with a terminal connected via an input / output port; Telephone control means for controlling the communication interface, etc.
D channel frame transmitted / received to / from interface means
Of the D-channel frame.
Or whether the source is a telephone or data terminal
An automatic private branch exchange system provided with a digital telephone having event discriminating means for controlling a transmission / reception path by discriminating and adding a terminal identifier to be transmitted, wherein an event sent from a terminal connected to the digital telephone is called. An event converting unit for converting the call control event into a control event, transmitting the call control event to the data terminal from the call control unit to the data terminal , and transmitting the call control event from the call control unit to the data terminal ; Is converted by the event converting means.
Receiving a call request from the data terminal,
Calls the other party according to the call request and opens the other party's call.
A call request to notify the data terminal that
Sending a response to the data terminal,
To make the telephone ring,
Call processing for sending an event control event to the digital terminal
Means .

Further, the call processing means in the private branch exchange system of the present invention further comprises a caller corresponding to the call request.
If the telephone answers, the other party's telephone and the digital
Connect the communication path with the
A connection notification event is transmitted to the terminal. Ma
In addition, event change in the private branch exchange system of the present invention.
The exchange means is a main unit, extension control unit, digital telephone,
And via the input / output port of the digital telephone.
It is provided in any of the connected terminals .

[0016]

According to the above arrangement, an event sent from a terminal connected to the digital telephone is converted into a call control event and transmitted to the call control means in the main unit. Since the digital telephone has an event converting means for converting the call control event into an event for the terminal, the digital telephone can send the event received from the main unit through the D channel to the data terminal.
Also, the data received from the data terminal can be sent to the main device as an event through the D channel,
The operation of the voice system of the digital telephone is controlled by the operation of the data terminal. Conversely, the voice system control data transmitted from the main unit is also transmitted to the data terminal, and the entire system is displayed on the screen of the data terminal. An extremely convenient service can be provided to the user of the digital telephone, for example, the operation status can be displayed.

[0017]

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.
In FIG. 1, the private branch exchange is roughly divided into three control units: a main unit 19, an extension control unit 20, and a digital telephone 21. The reference numeral 19 controls the entire system, and the extension control device 20 is provided for distributing the load of the main device 19, and transmits and receives D-channel frames to and from a plurality of digital telephones 21. Digital telephone
21 is connected to the extension control device 20 via an interface of 2B + D. For example, the extension control device 20 is 2B + D,
Two B channels with 64Kbps transmission rate and 16K
It is connected to one D channel having a transmission rate of bps, user information such as voice or data can be transmitted on the B channel, and control information required for exchange processing is transmitted on the D channel.

In the main unit 19, the communication path connecting means 22
Performs the connection processing of the B channel between extensions, and the call control means 23 transmits the digital telephone 21 through the D channel.
, And call control events such as state transition of the extension. Also, the extension interface means 24 (24
a, 24b,...) control an interface with the extension control device 20 and transmit and receive a D-channel frame to and from the extension control device 20. Further, the event conversion means 25 is
And an extension interface means 24a for converting data sent from the data terminal into a call control event or converting the call control event into data for sending to the data terminal.

In the extension control unit 20, the extension control means 26 distributes the D channel frame received from the call control means 23 via the extension interface means 24 to each digital telephone 21 according to the destination of the frame. The telephone interface means 27 (27a, 27b,...) Controls an interface with the digital telephone 21, and transmits and receives data to and from the digital telephone 21.

Further, the digital telephone 21 has a receiver 28 for making a voice call, a speaker 29 and a microphone 30 for making a hands-free voice call, and the operating means 31 includes a dial button and a hook switch. The display means 32 has a display unit such as an LED or an LCD. Also, the communication interface means 33
Manages communication with the private branch exchange, and the terminal interface means manages transmission and reception of data to and from a data terminal connected via an RS-232C input / output port. further,
The speed conversion means 35 performs mutual conversion of the speed in order to transmit low-speed data transmitted / received to / from a data terminal connected via the terminal interface means 34 on a 64 Kbps B channel. Further, the communication path control means 36 to which the receiver 28, the speaker 29 and the microphone 30 are connected is connected to the communication interface means 33 and the speed conversion means 35, and the receiver 28 and the speaker 2 for performing voice communication and data communication.
9. Enable the B channel connection between the microphone 30, the communication interface means 33 and the speed conversion means 35. Further, the telephone control means 37 controls the operation means 31, the display means 32, the terminal interface means 34 and the communication path control means 36. The event discriminating means 38 analyzes a D-channel frame transmitted / received to / from the private branch exchange and controls a path of the D-channel frame to be transmitted / received.

FIG. 2 is a configuration diagram of a D channel frame transmitted and received in the private branch exchange of FIG. In FIG. 2, the D channel frame is an extension identifier 59 for identifying the destination or source extension of the D channel frame.
And a terminal identification unit 60 for identifying whether the destination or source of the D channel frame is a telephone or a data terminal.
And an event type unit 61 storing an event type of the call control event, and an event information unit 62 storing event parameters and the like.

First, the operation of the private branch exchange when the data terminal performs a voice transmission operation from the data terminal will be described. FIG. 3 is a sequence flow showing an outline of processing when a voice call is made from a data terminal in the private branch exchange in FIG. As shown in FIG. 3, when the data terminal user performs a voice call operation to extension number 100 by an application installed in the data terminal (step 39), the data "ATDV100" is transmitted from the data terminal to the terminal. It is sent to the event discriminating means 38 via the interface means 34. Event discriminating means 38 is D
A channel frame is formed, the terminal identifier is set to 1 in the terminal identifier to indicate that the source of the D-channel is a data terminal, and the D-channel frame is multiplexed via the communication interface means 33 and the extension control device
Send to 20. The extension control means 26, which has received this D channel frame via the telephone interface means 27,
An extension identifier 59 indicating which telephone is the source of the D channel is set, and the D channel frame is transmitted to the main unit 19 (step 40).

Then, the D-channel frame is transmitted to the event conversion means 25 via the extension interface means 24 (step 41). ADTV100 "data as" call request "
Is converted to a call control event, "call request" is set in the event type section 61 or "100" is set in the event information section 62, and transmitted to the call control means 23 (step 42). This D
Upon receiving the channel frame, the call control means 23 starts calling the other party's telephone, that is, extension 100 (step 4).
3) A D-channel frame is formed to notify the digital telephone 21 and the data terminal that the call of the other party has started. Extension identification part of D channel frame
59 and the terminal identifier section 60 respectively copy the corresponding identifiers of the D channel frame "call request" received earlier, set "call request response" in the event type section 61, and convert the D channel frame into an event. The message is transmitted to the means 25 (step 44).

Further, the event conversion means 25 having received the D channel frame converts the "call request response" event into data "RING" according to the conversion table of FIG. 4, and transmits the data to the extension interface means 24 (step). 45). The extension interface means 24 transmits the converted event to the extension control means 26 in the extension control device 20. The extension control means 26 passes the extension to the telephone interface means 27 of the telephone according to the extension identifier 59 of the D channel frame. The telephone interface means 27 transmits the passed D-channel frame to the event discriminating means 38 through the communication interface means 33 in the digital telephone 21, and the event discriminating means 38 which has received the D-channel frame outputs the terminal identifier of the D-channel frame. Referring to the unit 60, since the destination is the data terminal, it is transmitted to the data terminal via the terminal interface means 34 (step 46).
The data terminal receiving the data "RING" switches the screen to the calling display (step 47).

At the same time as transmitting the "call request response" event in step 44, the call control means 23 sets the "speaker microphone control" event in the same It is transmitted as a D channel frame to the conversion means 25 (step 48). The event conversion means 25 does not perform event conversion because the destination of the event is the telephone, and transmits the event to the extension interface means 24 as it is (step 49). Upon receiving the D channel frame, the extension interface means 24 sets the terminal identifier section 60 of the D channel frame to 0 indicating the telephone.
Is set, and the digital telephone 21 is set via the extension control means 26 and the telephone interface means 27 in the extension control device 20.
To the communication interface means 33 and the event discriminating means 38. The event discriminating means 38 refers to the terminal identifier section 60 and passes the event to the telephone control means 37 because the destination is the telephone. The telephone control means 37 is a communication path control means.
36 is controlled so that the other party's ringing tone can be heard from the speaker 29.

Next, the main unit confirms that the other party's telephone has answered.
When the 19 call control means 23 detects (step 50), the call control means 23 controls the communication path connection means 22 to form a communication path for the two telephones, in the same manner as when transmitting the "call request response" event. To the event conversion means 25,
Transmission is made in a channel frame (step 51). And an event conversion unit that receives the “connection notification” event.
25 is converted to data "CONNECT" and transmitted to the data terminal in the same manner as before (steps 52 and 5).
3) Then, the data terminal switches the display to the display during the call (step 54). When the call is disconnected by operating this data terminal (step 55), the data terminal sends “A”
The data "TH" is sent from the terminal interface means 34 to the event conversion means 25 via the event discrimination means 38, the communication interface means 33, the telephone interface means 27, the extension control means 26 and the extension interface means 24 (step 56, 57). This event conversion means 25
Converts the "ATH" data into a call control event called "end notification" with reference to the event conversion table, and transmits it to the call control means 23, as in the case of receiving the "ATDV100" data (step 58). The call control means 23 that has received the “end notification” event controls the communication path control means 22 to disconnect the communication path.

Therefore, the extension control means 20 and the event discriminating means 38 control the path of the D channel frame.
Since the event conversion means 25 is arranged to control the event conversion in the D channel frame, the data from the data terminal can be converted and transmitted to the private branch exchange by the D channel. The D channel frame from the private branch exchange can be converted and transmitted to the data terminal.

In this embodiment, the event conversion means 25
Is provided in the main unit 19, but the event converting means 25a may be provided in the extension control device 20a as shown in FIG. 5, and the event converting means 25b may be provided in the digital telephone 21b as shown in FIG. The event conversion means 25c may be provided in the data terminal 63 as shown in FIG. In these cases, the event conversion means 25a, 25
Regardless of where the devices b and 25c are located, the only place where the event is converted is different, and the data event is converted from the data terminal into a call control event and reaches the call control means 23.

[0029]

As described above, according to the present invention, by providing the event conversion means, the data received from the data terminal can be transmitted to the private automatic exchange on the D channel. Data received on the D channel from the automatic exchange can be transmitted to the data terminal. Therefore, if an application is installed on the data terminal and the operation of the data terminal is converted into data that can be interpreted by the private branch exchange by the application program and transmitted, the operation of the voice system of the digital telephone can be controlled by the operation from the data terminal. Can be easily performed,
If voice control data transmitted from the private branch exchange to the digital telephone is also sent to the data terminal, for example, the use status and operation status of the extension telephone are displayed on the screen by an application program on the data terminal. Thus, a very convenient service can be provided to the user of the digital telephone or the data terminal connected to the digital telephone.

[Brief description of 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 configuration diagram of a D channel frame transmitted and received in the private branch exchange in FIG. 1;

FIG. 3 is a sequence flow showing an outline of processing when a voice call is made from a data terminal in the private branch exchange in FIG. 1;

FIG. 4 is a conversion table between data terminal transmission / reception data and a call control event in the event conversion means of FIG. 1;

FIG. 5 is a block diagram showing a system configuration of an automatic private branch exchange in which an event conversion unit is arranged in an extension control unit according to another embodiment of the present invention.

FIG. 6 is a block diagram showing a system configuration of a private branch exchange in which event conversion means is arranged in a digital telephone according to still another embodiment of the present invention.

FIG. 7 is a block diagram showing a configuration of an automatic private branch exchange system in which event conversion means is arranged in a data terminal according to still another embodiment of the present invention.

FIG. 8 is a block diagram showing a system configuration of a conventional private branch exchange.

[Explanation of symbols]

 19 Main device 20, 20a Extension control device 21, 21b Digital telephone 23 Call control means 25, 25a, 25b, 25c Event conversion means 26 Extension control means 31 Operation means 32 Display means 33 Communication interface means 34 Terminal interface means 37 Telephone control means 38 Event discrimination means 63 Data terminal

Continuation of the front page (56) References JP-A-4-152741 (JP, A) JP-A-5-3578 (JP, A) JP-A-63-253796 (JP, A) JP-A-4-369994 (JP) , A) (58) Fields investigated (Int. Cl. ⁷ , DB name) H04Q 3/58 101 H04M 1/00 H04M 3/42

Claims (3)

(57) [Claims] 1. A main unit having a call control unit for controlling calls such as connection between extensions and between internal and external lines, and an extension control unit for controlling transmission and reception of control information between the main unit and a plurality of digital telephones. An extension control device having at least one input / output port, connected to the extension control device via an interface including at least one B channel and a D channel, and performing B channel communication with the extension control device. a communication interface unit that controls the channel communication, a terminal interface unit for controlling input and output of data with the terminals connected through the input-output ports, and telephone control means for controlling the like telephones operating unit and a display unit, wherein D transmitted to and received from the communication interface means
Perform channel frame formation and analysis, and
Whether the destination or source of the frame is a phone
By determining and adding a terminal identifier that identifies the terminal
Ri, a private automatic branch exchange system having a digital telephone having an event discrimination unit for controlling the transmission and reception paths, and converts the event that the digital phone sent from the connected terminal to the call control events, Transmit to the call control means in the main unit, and from the call control means
An event converting means for converting the call control events to the data terminal in the event of terminal, the data terminal which has been converted by the event converting means
If a call request is received from the
Call the hand and start calling the other party.
A call request response to notify the data terminal
Send to the terminal and call the other party to the digital telephone.
Speaker microphone control event to hear the sound
Call processing means for transmitting the
And an automatic private branch exchange system. 2. The call processing means according to claim 1 , further comprising:
Corresponding to the case where the other party phone is answered, the other party telephone
When connecting the communication path between the handset and the digital telephone,
Sends a connection notification event to the data terminal
The automatic private branch exchange system according to claim 1, wherein: 3. An event conversion means comprising: a main unit;
Device, digital telephone, and digital telephone
Any of the terminals connected via the input / output port of
2. The automatic private branch exchange system according to claim 1, further comprising: