JPH05300202A - Digital telephone set - Google Patents

Abstract

PURPOSE:To facilitate the operation control of a voice system by providing an event discrimination means to the telephone set so as to make communication between a DTE and a private branch of automatic exchange thereby sending data on a D-channel. CONSTITUTION:Data of a B-channel and a D-channel from a private branch of automatic exchange multiplexed are sent to a communication interface means 16. An event discrimination oceans 21 receives only the D channel data from the means 16 to form the D channel frame and when a reception frame is normal and a transmission destination address part 41 is normal, the transmission destination is analyzed. When the address part 41 points out a DTE and the DTE is not busy, the means 21 controls a DTE interface means 17 to send the reception frame to the DTE. When a frame transmission request comes and the transmission request destination is a digital telephone set, the means 21 sets an address of the digital telephone set to a transmission source address part 42 of the frame to be sent and controls the means 16 to send the frame on the D channel to the private branch of automatic exchange.

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 connected to a private automatic branch exchange 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 digital telephone. 1 is a handset for making a voice call, 2 and 3 are speakers and a microphone for making a voice call hands-free, 4 is an operating means including a dial button and a hook switch, and 5 is a display means such as an LED or LCD. is there. 6 is a communication interface means for communication with the private automatic branch exchange, for example, 2B + D with the private automatic branch exchange, that is, 2 having a transmission rate of 64 kbps.
One B channel is connected to one D channel having a transmission rate of 16 kbps, user information such as voice or data can be transmitted on the B channel, and control information necessary for exchange processing is transmitted on the D channel. 7 is RS-23
DTE interface means for transmitting / receiving data to / from a data terminal (hereinafter referred to as DTE) connected via the 2C input / output port, and 8 is low speed transmission / reception with the DTE connected via the DTE interface means 7. Speed conversion means for performing mutual conversion of speeds in order to transmit the above data on the 64 kbps B channel, and 9 for the handset 1, speaker 2, microphone 3, communication interface means 6 and speed conversion for performing voice call and data communication. A call path control means for connecting the B channel between the means 8 and a telephone control means 10 for controlling the operation means 4, the display means 5, the DTE interface means 7 and the call path control means 9.

The operation of the conventional digital telephone 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 goes off-hook, the telephone control means 10 detects this through the operating means 4. The telephone control means 10 transmits this off-hook event to the private automatic branch exchange via the communication interface means 6 on the D channel. Upon receiving the off-hook event, the private automatic branch exchange receives the B channel connection information for allowing the user to hear the dial tone from the handset 1, and the control information such as LED information and LCD information for controlling the display means such as LED and LCD. Is transmitted to the digital telephone through the D channel. Upon receiving the above various control information (B channel connection information, LED information, LCD information) via the communication interface means 6, the telephone control means 10 controls the call path control means 9 and the display means 5 to dial the user. While sending out the tone,
Display on LED or LCD. When the user who hears the dial tone operates the dial to call the other party,
Similarly to the above, the telephone control means 10 detects this through the operation means 4 and sequentially transmits the dial event to the private automatic branch exchange through the communication interface means 6. The private automatic branch exchange that has received the dial event analyzes the dial and performs the calling process of the other party. When the calling party answers, L to display that fact on the LCD
Transmit CD information to digital telephone. 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. Even with the above, a voice call on the B channel becomes possible.

Next, the operation when automatic transmission of the data system is performed will be described with reference to FIG. When the user of the DTE performs a call operation (for example, an ATD command in the AT command system) to the intended party, the telephone control means 1
0 detects this via the DTE interface means 7. The telephone control means 10 transmits this calling event of DTE to the private automatic branch exchange via the communication interface means 6 through the D channel. The private automatic branch exchange which has received this call-out event analyzes the call-out event and performs a calling process for the partner DTE. When the calling party answers, the B-channel connection information for transmitting data on the B-channel between the DTEs is transmitted to the digital telephone. Upon receiving this 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. A path of 7 is formed to enable data communication on the B channel between DTEs. In addition to the above-mentioned calling method, the DT is operated by operating the operation means 4 of the digital telephone.
There is also a method of making a call from E on behalf (proxy call).

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]

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 digital telephone, the data from the terminal (DTE) is transmitted only through the B channel, and only the end-to-end data communication function is provided. That is, there is a problem in that there is no link between the DTE and the application installed in the private automatic branch exchange, and for example, the DTE cannot control the voice call at all.

The present invention solves the above-mentioned conventional problems, and an object thereof is to provide a digital telephone capable of communicating between a DTE and a private automatic branch exchange.

[0010]

In order to achieve the above object, the present invention provides a communication interface means for B channel communication and D channel communication with a private automatic branch exchange, and R
In addition to DTE interface means for controlling the input / output of data to / from a terminal connected via S-232C, and telephone control means for controlling the operation unit and display unit of the telephone,
Communication interface means, DTE interface means,
The configuration is provided with event discrimination means for controlling the transmission / reception path of D channel frames between the telephone control means.

[0011]

The present invention is constructed as described above,
An event received from the private branch exchange through the D channel can be sent to the DTE, and the received data from the DTE can be sent to the private branch exchange as an event through the D channel.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A digital telephone according to an embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing the system configuration of a digital telephone according to an embodiment of the present invention.
FIG. 2 shows a processing flow in the event discriminating means when the digital telephone receives the D channel frame from the private automatic exchange, and FIG. 3 shows a processing flow in the event discriminating means when the digital telephone transmits the D channel frame to the private automatic exchange. FIG. 4 shows the structure of D channel frames transmitted and received between the digital telephone and the private automatic branch exchange.

In FIG. 1, 11 is a handset for making a voice call, 12 and 13 are speakers and a microphone for making a hands-free voice call, 14 is an operating means including a dial button and a hook switch, and 15 is an LED. And LC
Display means such as D. Reference numeral 16 denotes a communication interface means for communication with a private automatic branch exchange, which is connected to the private automatic branch exchange by 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. , B channel can transmit user information such as voice or data, and D channel can transmit control information or user information necessary for exchange processing. Reference numeral 17 is a DTE for data transmission / reception with a data terminal connected via an RS-232C input / output port.
The interface means 18 is a speed conversion means 19 for performing mutual conversion of speeds for transmitting low speed data transmitted / received to / from the DTE connected via the DTE interface means 17 on the B channel of 64 kbps. Is a communication path control means for B channel connection between the handset 11, the speaker 12, the microphone 13, the communication interface means 16 and the speed conversion means 18 for voice communication and data communication, and 20 is an operation means 44 and a display means 15. , A DTE interface means 17 and a telephone line control means 19 for controlling the telephone path control means, and a reference numeral 21 for adding / deleting address information to / from the D channel frame transmitted / received to / from the private automatic branch exchange, and for transmitting / receiving the D channel. It is an event discriminating means for controlling the path of the frame. Also, FIG.
In the figure, 41 is a destination address part, 42 is a source address part, and 43 is a transmission / reception information part in which data to be actually transmitted / received is stored.

The mutual relationship and operation of the digital telephone of this embodiment having the above components will be described below with reference to FIGS. 1, 2, 3 and 4.

First, regarding the operation when the digital telephone receives the D channel frame from the private automatic branch exchange,
Description will be made with reference to FIGS. 1, 2 and 4. From the private branch exchange, B channel data and D channel data are multiplexed and transmitted to the communication interface means 16. The event discriminating means 21 is the communication interface means 1.
Only D channel data from 6 is received and a D channel frame is formed (step 22). Event discrimination means 2
1 analyzes whether the received D channel frame is normal (step 23), and when the frame is abnormal, discards the received frame (step 24). If the received frame is normal, it is analyzed whether or not the destination address part 41 at the head of the received frame is normal (step 2
5) If the address is abnormal, the received frame is discarded as described above (step 24). Next, when the destination address part 41 is normal, the event discrimination means 21
Analyzes the destination (step 26). If the destination address section 41 is a digital telephone, the event discrimination means 21 deletes the destination address section 41 from the received frame (step 27) and passes the frame to the telephone control means 20 (step 28). The telephone control unit 20 analyzes the received frame and controls the display unit 15, the communication path control unit 19 and the like according to the analysis result. on the other hand,
When the destination address part 41 is the DTE, the event discriminating means 21 determines whether the DTE is currently in the data communication by the B channel (step 29). If the DTE is in end-to-end data communication on the B channel, then D
The received frame is not sent to the TE but is discarded (step 2).
4). If the DTE is not in data communication, the event discrimination means 21 deletes the destination address part 41 from the received frame (step 30), and the DTE interface means 17
To send the received frame to the DTE (step 31).

Next, the operation when the digital telephone transmits the D channel frame to the private automatic branch exchange will be described with reference to FIGS. 1, 3 and 4. The event discriminating means 21 monitors whether there is a frame to be sent to the private automatic branch exchange (step 32). When there is a frame transmission request, it is judged whether the request source is a digital telephone or DTE (step 33). When the transmission request source is a digital telephone, the event discrimination means 21 sets the address of the digital telephone in the transmission source address part 42 of the frame to be transmitted (step 34) and controls the communication interface means 16 to the private automatic branch exchange. The frame is transmitted on the D channel (step 35). On the other hand, DT
When the request source of the frame transmission request is the DTE due to an interrupt from the E interface means 17 or the like, it is judged where the transmission destination of the frame is (step 3).
6). When the destination is the private branch exchange, the event discriminating means 21 sends the source address part 4 of the frame to be transmitted.
2 sets the DTE address (step 37) and controls the communication interface means 16 to transmit the frame to the private automatic exchange over the D channel (step 3).
8). When the destination is a digital telephone, the event discriminating means 21 sets the DTE address in the destination address portion 42 of the frame to be transmitted in the same manner as described above (step 39), and the frame is transmitted to the telephone control means 20 in the digital telephone. Pass (step 40).

During the data communication by the B channel between end-to-end along the route of the DTE through the DTE interface means 17-speed conversion means 18-speech path control means 19-communication interface means 16, it goes without saying to the private automatic branch exchange. D channel frame transmission processing is not performed.

As described above, according to this embodiment, since the event discriminating means is arranged so as to control the transmission path of the D channel frame among the communication interface means, the DTE interface means and the telephone control means, the reception from the DTE. The data can be transmitted to the private automatic branch exchange through the D channel, and the data received from the private automatic branch exchange through the D channel can be transmitted to the DTE.

[0019]

As is clear from the embodiments described above, according to the present invention, the DT is equipped with the event discriminating means.
Since it is possible to communicate between E and the private branch exchange, DTE
The data received from the private branch exchange can be transmitted on the D channel, and the data received from the private branch exchange on the D channel can be transmitted to the DTE. Therefore, the application is installed on the DTE, and the D
After converting the operation in the TE into data that can be interpreted by the private branch exchange, if the address of the private branch exchange is set in the destination address 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. Thus, it is possible to provide a digital telephone that can provide extremely convenient services to users of the digital telephone or a DTE connected to the digital telephone.

[Brief description of drawings]

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

FIG. 2 is a flow chart showing an outline of processing when the D-channel frame is received from the private automatic branch exchange in the telephone.

FIG. 3 is a flowchart showing an outline of a process of transmitting a D channel frame to a private branch exchange in the same telephone.

FIG. 4 is a block diagram of a D channel frame transmitted between the private branch exchange and the digital telephone in the same telephone.

FIG. 5 is a block diagram showing a system configuration of a conventional digital telephone.

[Explanation of symbols]

 16 Communication Interface Means 17 DTE Interface Means 20 Telephone Control Means 21 Event Discrimination Means

Claims (1)

[Claims] 1. A digital telephone having at least one RS-232C input / output port and connected to a private automatic branch exchange through an interface consisting of at least one B channel and D channel, which is a B to the private automatic branch exchange. Communication interface means for channel communication and D-channel communication, DTE interface means for controlling input / output of data to / from a terminal connected via RS-232C, and control means including operation part and display part of telephone A telephone control unit for controlling the transmission and reception, an event discrimination unit for controlling a transmission / reception path of the D channel frame among the communication interface unit, the DTE interface unit, and the telephone control unit, and the private automatic branch exchange via the communication interface unit. Send at the beginning of the D channel frame to be sent and received By adding the address information of the destination and the destination information, when the D channel frame is received from the private automatic exchange, the event discrimination means refers to the address information and transmits the received frame to the DTE interface means or the telephone control means, A digital telephone configured to set address information in a transmission frame from the DTE interface means or the telephone control means, and then transmit it as a D channel frame to the private automatic branch exchange via the communication interface means.