JPH05300203A - Digital telephone set - Google Patents

Abstract

PURPOSE:To facilitate the operation control of a voice system by providing an event distribution collection means to the telephone set so as to make communication between a DTE and a private branch of automatic exchange so as to send data on a D-channel. CONSTITUTION:An event distribution collection means 21 receives only D-channel data from a communication interface means 16 to form a D-channel frame. When a reception frame is normal and a DTE is not busy with a B-channel, the means 21 duplicates the reception frame to make transmission to both of a telephone set control means 20 and a DTE interface means 17. The means 21 gives one frame to the means 17 and the other frame to the means 20. When the DTE is busy with a B-channel, the means 21 gives the reception frame to the means 20 only. Upon the receipt of a transmission request of a frame, the means 21 controls the means 16 to send the frame on a 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. 3 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 for transmitting the data of 1) on the B channel of 64 kbps, and 9 for the handset 1, the speaker 2, the microphone 3 for performing voice call and data communication.
B between the communication interface means 6 and the speed conversion means 8
A speech path control means for channel connection, and numeral 10 are telephone control means for controlling the operation means 4, the display means 5, the DTE interface means 7 and the speech 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. As described above, it becomes possible to make a voice call on the B channel.

Next, the operation when the data system is automatically transmitted 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,
Duplicating the D channel frame from the private branch exchange,
It has a configuration provided with an event collection and delivery means for transmitting to both the digital telephone and the DTE, and transmitting the transmission frames of both the digital telephone and the DTE to the private automatic branch exchange via the communication interface 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 collecting and delivering means when the digital telephone receives the D channel frame from the private 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 performing a voice call or data communication, and 20 is an operation means 14 and a display means 15. , A telephone control means for controlling the DTE interface means 17 and the communication path control means 19, and 21 duplicates the D channel frame transmitted from the private automatic branch exchange via the communication interface means 16 and transmits the frame to both the telephone and the DTE. In addition, the communication interface for frames from both the telephone and DTE To private automatic branch exchange through the stage is an event collection and delivery means for delivering a D-channel frame.

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 and 2.

First, regarding the operation when the digital telephone receives the D channel frame from the private automatic branch exchange,
A description will be given based on FIGS. 1 and 2. B from the automatic premises switch
The channel data and the D channel data are multiplexed and transmitted to the communication interface means 16. The event collection and delivery means 21 receives only D channel data from the communication interface means 16 and forms a D channel frame (step 22). The event collection and delivery means 21 analyzes whether the received D channel frame is normal (step 23), and if the frame is abnormal, discards the received frame (step 24). If the received frame is normal, the event collection and delivery means 21 determines whether the DTE is currently performing data communication on the B channel (step 2).
5). If the DTE is not in the end-to-end data communication by the B channel, the event collecting and delivering means 21 sends the received D channel frame to both the telephone control means 20 and the DTE interface means 17, so that the received frame is duplicated. That is, the same frame as the received frame is newly generated (step 26). The event collection and delivery means 21 passes one frame to the DTE interface means 17 (step 27) and the other frame to the telephone control means 20 (step 28). The telephone control means 20 analyzes the received frame and controls the display means 15, the communication path control means 19, etc. according to the analysis result.
If the DTE is in the end-to-end data communication by the B channel in step 25, the event collecting and delivering means 21 does not deliver the received frame to the DTE interface means 17, but only to the telephone control means 20 (step 2).
8).

Next, the operation of the digital telephone when transmitting a D channel frame to the private automatic branch exchange will be described with reference to FIG. The event collection and delivery means 21 monitors whether or not there is a frame to be sent to the private branch exchange. When there is a frame transmission request, the event collection and delivery means 21 controls the communication interface means 16 to transmit the frame to the private automatic branch exchange on the D channel regardless of whether the request source is a digital telephone or DTE.

However, when the DTE is in the data communication by the B channel between end-to-end along the route of the DTE interface means 17-speed conversion means 18-call path control means 19-communication interface means 16, the DTE interface means 17 For the above frame, the D channel frame transmission process to the private automatic branch exchange is not performed, and the transmission process is performed only for the frame from the telephone control means 20.

As described above, according to this embodiment, the D channel frame from the private automatic branch exchange is transmitted to both the digital telephone and the DTE, and the digital telephone and the DTE.
Since the event collecting and delivering means is provided so as to transmit the transmission frame from the private branch exchange to the private branch exchange, the DTE and the private branch exchange can communicate with each other.

[0019]

As is clear from the embodiments described above, according to the present invention, the DTE is provided with the event collecting and delivering means.
Since the communication between the private branch exchange and the private automatic exchange can be performed, the data received from the DTE can be transmitted to the private automatic branch exchange on the D channel, and the data received from the private automatic branch exchange on the D channel can be transmitted. Can be transmitted to. Therefore, an application is installed on the DTE and the DTE is executed by the application program.
After converting the operation in step 1 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 and transmitted, the operation of the voice system of the digital telephone can be controlled by the operation from the DTE. Easy to do. Further, since 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. This makes it 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 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 collecting and delivering 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 And a communication interface means, a DTE interface means, and an event collecting / delivering means for controlling transmission / reception of D channel frames among the telephone control means, and the private automatic exchange switches the telephone through the communication interface means. D-channel frame sent to The arm, duplicated by the event collection and delivery means, the D
The event collecting and delivering means transmits the transmission frame transmitted to the TE interface means and the telephone control means and received from the DTE via the DTE interface means or the transmission frame received from the telephone control means via the communication interface means. A digital telephone adapted to be transmitted as a D channel frame to the private branch exchange.