JPH0630091A - Digital telephone set - Google Patents

Abstract

PURPOSE:To provide service with high convenience by sending an event received via a channel D from a private branch exchange to a DTE, and sending reception data from the DTE to the private branch exchange via the channel D as the event. CONSTITUTION:When a digital telephone set 17 receive data from the private branch exchange 27, the data on channel B is multiplexed with the data on channel D, and they are transmitted to a communication interface 20. An event disassembling means 25 receives only the data on channel D from the interface 20, and forms a D-channel frame. Thence, the disassembling means 25 sends out frame data to the digital telephone set 17 and the DTE 28 by controlling a telephone set control means 24 and a DTE interface means 21. When the telephone set 17 transmits the D-channel frame to the exchange 27, an event synthesis means 26 discriminates whether or not a request is a transmission request from the DTE 28 or the telephone set 17, and transmits it to the exchange 27 by controlling the communication interface 20.

Description

Detailed Description of the Invention

[0001]

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

[0002]

2. Description of the Related Art FIG. 5 shows a system configuration diagram of a conventional digital telephone. In FIG. 5, 1 is a handset for making a voice call, 2 and 3 are speakers and a microphone for making a hands-free voice call, 4 is an operating means including a dial button and a hook switch, and 5 is an LED, an LCD, etc. Is a display means. Reference numeral 6 denotes a communication interface means for controlling communication with the private automatic branch exchange 13. For example, the private automatic branch exchange 13 is connected to 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. In the B channel, user information such as voice or data can be transmitted, and in the D channel, control information necessary for exchange processing is transmitted. 7 is a data terminal device 12 (hereinafter, referred to as “DTE”) connected via an RS-232C input / output port.
DTE interface means for controlling data transmission / reception to / from, and 8 for low-speed data transmitted / received to / from the DTE 12 connected via the DTE interface means 7,
Speed conversion means for performing mutual conversion of speeds for transmission on B channel of 64 Kbps, and 9 for handset 1, speaker 2, microphone 3, communication interface means 6 and speed conversion means 8 for performing voice call and data communication. Communication channel control means for enabling B channel connection of
Reference numeral 0 is a telephone control means for controlling the operation means 4, the display means 5, the DTE interface means 7 and the communication path control means 9.

The operation of the conventional digital telephone 11 having the above components when a voice-based transmission operation is performed will be described with reference to FIG.

When the user of the digital telephone set 11 goes off-hook, the telephone set control means 10 notifies the operation means 4 of the fact.
To detect through. The telephone control means 10 transmits an off-hook event to the private automatic branch exchange 12 via the communication interface means 6 using the D channel. Upon receiving the off-hook event, the private automatic branch exchange 12 receives B channel connection information for allowing the user to hear a dial tone from the handset 1, and LED information for controlling display means such as an LED or LCD (not shown). , Control information such as LCD information is transmitted to the digital telephone 11 through the D channel. Through the communication interface means 6, the various control information (B channel connection information, LED
Information, LCD information), the telephone control means 10 receives
It controls the communication path control means 9 and the display means 5 to send a dial tone to the user and display the LED or LCD. When the user who listens to the dial tone performs a dial operation to call the other party, the telephone control means 10 detects the same through the operation means 4 and the premises automatic operation is performed through the communication interface means 6 as described above. The dial events are sequentially transmitted to the exchange 13. Upon receiving the dial event, the private automatic branch exchange 13 analyzes the dial and performs the calling process of the other party. When the calling party answers, LCD information for displaying the fact on the LCD is transmitted to the digital telephone 11. Upon receiving the LCD information via the communication interface means 6, the telephone control means 10 controls the display means 5 to display a message on the LCD. As described above, the voice call on the B channel becomes possible.

Next, the operation when the data system is automatically transmitted will be described with reference to FIG. When the user of the DTE 12 performs a calling operation (for example, an ATD command in the AT command system) to the intended party, the telephone control means 10 detects this via the DTE interface means 7. The telephone control unit 10 sends the DTE 12 to the private branch exchange 13 via the communication interface unit 6.
The transmission event is transmitted on the D channel. The private automatic branch exchange 13 that has received the call origination event analyzes the call origination event and performs the calling process of the DTE 12. When the calling party answers, the B-channel connection information for transmitting the B-channel data between the DTE 12 and the private automatic branch exchange 13 is transmitted to the digital telephone 11. Upon receiving the B-channel connection information via the communication interface means 6, the telephone control means 10 controls the call path control means 9 to make communication interface means 6-call path control means 9-speed conversion means 8-DTE interface means 7. This enables the data communication on the B channel. In addition to the calling method described above, the DTE 1 can be operated by operating the operation means 4 of the digital telephone 11.
There is also a method (calling on behalf) of calling from 2 instead.

As described above, in the conventional digital telephone, only the control information necessary for the exchange process is transmitted on the D channel, and the user information such as voice or data is transmitted only on the end channel from the B channel.

[0007]

However, in the above-mentioned conventional digital telephone, the data from the DTE is B
It was possible to transmit only through channels, and only the end-to-end data communication function was provided.
That is, there is no link between the DTE and the application installed in the private automatic branch exchange.
Therefore, there was a problem that it was not possible to control voice calls at all. An object of the present invention is to provide a digital telephone that solves the above-mentioned conventional problems.

[0008]

To achieve the above object, the present invention provides a communication interface means for controlling B channel communication and D channel communication with a private automatic branch exchange, and a terminal connected through RS-232C. DTE interface means for controlling the input / output of the data, telephone control means for controlling the operation part and display part of the telephone, event decomposing means for decomposing the D channel frame into DTE-related events and telephone-related events, and DTE interface means, It is configured to include a synthesizing unit that synthesizes an event from the telephone control unit and creates a D channel frame.

[0009]

With the above-mentioned structure, the digital telephone according to the present invention can send the event received from the private automatic exchange through the D channel to the DTE, and the received data from the DTE to the private automatic exchange.
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 DTE, and conversely, the voice system control data transmitted from the private automatic branch exchange is also sent to the DTE and displayed on the screen of the DTE. It is possible to provide a very convenient service to the user of the digital telephone, such as displaying the operation status of the entire system.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a digital telephone according to the present invention will be described below with reference to the drawings. FIG. 1 is a system configuration diagram of a digital telephone according to this embodiment, FIG. 2 is a configuration diagram of a D channel frame transmitted / received between the digital telephone and a private automatic exchange, and FIG. 3 is a digital telephone transmitting a D channel frame from the private automatic exchange. FIG. 4 is a processing flowchart in the event decomposing means when receiving, and FIG. 4 is a processing flowchart in the event synthesizing means when the digital telephone transmits the D channel frame to the private automatic branch exchange.

In FIG. 1, 14 is a handset for making a voice call, 15 and 16 are speakers and a microphone for making a hands-free voice call, 17 is a digital telephone according to the present invention, and 18 is a dial button or hook switch. Reference numeral 19 is an operating means including a display means such as an LED or LCD. Reference numeral 20 denotes a communication interface means for controlling communication with the private automatic branch exchange 27. For example, the private automatic branch exchange 27 is connected to 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. User information such as voice or data can be transmitted on the B channel.
The channel carries control information or user information necessary for the exchange process. Reference numeral 21 denotes DTE interface means for controlling data transmission / reception with the DTE 28 connected via the RS-232C input / output port, and 22 denotes low-speed data transmitted / received with the DTE 28 connected via the DTE interface means 21. , 64 Kbps B
Speed conversion means for performing mutual conversion of speeds for transmission on the channel, and 23 for communication between the handset 14, the speaker 15, the microphone 16, the communication interface means 20, and the speed conversion means 22 for performing voice call and data communication. A call path control means for enabling B channel connection, 24 is a telephone control means for controlling the operation means 18, the display means 19, the DTE interface means 21 and the call path control means 23. Further, 25 is an event decomposing means for decomposing the D channel frame transmitted from the private branch exchange 27 and transmitting it to the DTE interface means 21 and the telephone control means 24, and 26 is transmitted from the DTE interface means 21 and the telephone control means 24. It is an event synthesizing means for synthesizing incoming frames and transmitting them to the private branch exchange 27 as D channel frames. In FIG. 2, reference numeral 29 is a telephone frame length storage unit that stores the frame length of a frame to be transmitted to the telephone control unit 24, and 30 is the telephone control unit 2.
4 is a telephone transmission / reception information section in which data to be transmitted / received is stored, and 31 is DTE transmission / reception information in which data to be transmitted / received to / from the DTE interface means 21 is stored.

The operation of the digital telephone having the above-mentioned components according to this embodiment will be described below.

First, the operation when the digital telephone 17 receives a D channel frame from the private automatic branch exchange 27 will be described. From the private branch exchange 27, the B channel data and the D channel data are multiplexed and transmitted to the communication interface means 20. The event decomposition unit 25 receives only D channel data from the communication interface unit 20 and forms a D channel frame (step 1). The event disassembling means 25 analyzes whether the received D channel frame is normal (step 2), and if it is an illegal frame, discards the received frame (step 3). If the received frame is normal, the event disassembling means 25 takes out the telephone frame length storage unit 29 at the head of the received frame (step 4) and determines whether the frame length is not 0, that is, whether there is an event to the digital telephone 17. Analyze whether (step 5). If the frame length is not 0, the event disassembling means 25 sends data for the frame length to the telephone control means 24 (step 6). Then, the telephone control means 2
Reference numeral 4 analyzes the received frame, and controls the display means 19, the communication path control means 23 and the like according to the analysis result.
The event decomposing means 25 analyzes whether there are remaining frames, that is, whether there is an event to the DTE 28 (step 7). If there are remaining frames, the event disassembling means 25 determines whether the DTE 28 is currently performing data communication on the B channel (step 8). D
When the TE 28 is in the end-to-end data communication by the B channel, the reception frame is not sent to the DTE 28, and when the DTE 28 is not in the data communication, the event disassembling means 25 controls the DTE interface means 21 and remains. The received frame is sent to the DTE 28 (step 9).

Next, the operation of the digital telephone 17 when transmitting a D channel frame to the private automatic branch exchange 27 will be described. The event synthesizing means 26 monitors whether there is a frame transmission request from the DTE 28 or a frame transmission request from the digital telephone 17, that is, whether there is a frame to be sent to the private automatic branch exchange 27 (step 10). When there is a frame transmission request from either the DTE 28 or the digital telephone set 17, or both, it is first determined whether or not the request source is the digital telephone set 17 (step 11). When the transmission request source is the digital telephone 17, the event synthesizing means 26 sets the frame length of the frame from the digital telephone 17 in the telephone frame length storage unit 29 of the frame to be transmitted (step 12), and the frame contents are telephone information. It is set in the section 30 (step 13). The event synthesizing means 26 next determines whether or not there is a transmission request from the DTE 28 (step 14). If there is no transmission request from the DTE 28, there is no DTE information part 31 in the D channel frame, only the telephone information part 30
When there is a transmission request from the TE 28 as well, the event synthesizing means 26 causes the DTE information section 3 after the telephone information section 30.
The frame data from the DTE 28 is set to 1 (step 16). If there is no transmission request from the digital telephone 17 in step 11, the transmission request is DTE.
Only from 28, the telephone frame length storage unit 29 is set to 0 (step 15), the telephone information unit 30 does not exist, and D is displayed after the telephone frame length storage unit 29.
The TE information section 31 is set (step 16). The event synthesizing means 26 controls the communication interface means 20 to transmit the created frame to the private automatic branch exchange 27 on the D channel (step 17). When the DTE 28 is performing data communication on the B channel between end-to-end along the route of the DTE interface means 21-speed conversion means 22-call path control means 23-communication interface means 20, naturally the DTE 28 is connected to the private branch exchange 27. Frame transmission processing to the digital telephone 17 is not performed.

[0016]

As described above, according to the present invention,
Data received from the DTE can be transmitted to the private branch exchange on the D channel, and data received from the private branch exchange on the D channel can be transmitted to the DTE.

Therefore, an application is loaded on the DTE, and the D
After converting the operation in the TE into data that can be interpreted by the private automatic branch exchange, if the address of the private automatic branch exchange is set in the destination address part and transmitted, the operation of the voice system of the digital telephone is controlled by the operation from the DTE. Can be done easily. Furthermore, if voice control data transmitted from the private branch exchange to the digital telephone is also sent to the DTE, for example, an application program on the DTE can display the use state and operation state of the extension telephone on the screen. become.

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 DTE connected to the digital telephone.

[Brief description of drawings]

FIG. 1 is a system configuration diagram of a digital telephone according to an embodiment of the present invention.

FIG. 2 is a configuration diagram of a D channel frame transmitted between a private branch exchange and a digital telephone according to the present embodiment.

FIG. 3 is a flowchart showing an outline of processing when a D channel frame is received from the private automatic branch exchange according to the present embodiment.

FIG. 4 is a flowchart showing an outline of processing when a D channel frame is transmitted to the private automatic branch exchange according to the present embodiment.

FIG. 5 is a system configuration diagram of a digital telephone according to a conventional example.

[Explanation of symbols]

 14 Handset 15 Speaker 16 Microphone 17 Digital telephone 18 Operation means 19 Display means 20 Communication interface means 21 DTE interface means 22 Speed conversion means 23 Call path control means 24 Telephone control means 25 Event decomposition means 26 Event synthesis means 27 Private automatic exchange 28 data Processor

Claims (1)

[Claims] 1. A digital telephone connected between a private automatic branch exchange and a data processing device, wherein the digital telephone manages communication between the data processing device and first interface means for communicating with the private automatic exchange. Second interface means, event decomposing means for decomposing the D channel frame received by the first interface means into an event relating to the data processing device and other events, and an event decomposing by the second interface means And an event synthesizing means for synthesizing the D channel frame by synthesizing with the event, and a control means for controlling the operations of the first interface means, the second interface means, the event decomposing means and the event synthesizing means. A digital telephone.