JPH01293750A - Digital telephone set - Google Patents

Abstract

PURPOSE:To correspond to an incoming call received during another call by storing the number of the incoming call received during the call and automatically transmitting an answer for the incoming call by operating a selecting key after the call ends. CONSTITUTION:An incoming call rejecting means and an automatic transmitting means are included in a central processing unit 4. When either an incoming voice call or the incoming call from the different kind of terminal is received during another voice call, the telephone number of a calling side is stored in a storing memory 14, the incoming call is rejected by the incoming call rejecting means, and the voice call is continued. Further, after the voice call ends, the telephone number is selected from the memory 14 by operating a selecting key 15, and the answer for the incoming call is transmitted by the automatic transmitting means. Thus, the incoming call received during the call is not ignored, and the answer to the rejected calling side can be transmitted without pressing a ten key.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a digital telephone connected to a digital network via a digital subscriber interface.

[Conventional technology]

FIG. 6 is a block diagram showing the configuration of a conventional digital telephone set, for example, shown in IEICE Technical Report 5E85-92.

In the figure, reference numeral 1 denotes a digital subscriber interface of an I5DN (integrated services digital network), into which information channels B, B, and signal channel D are multiplexed and input/output.

2 are connected to the digital subscriber interface 1 and the information channels B1 . A line interface ■/F circuit 3 separates and multiplexes Bz and signal channels D, and 3 is a line interface ■/F circuit that separates and multiplexes information channels B, B, separated by the line 1/F circuit 2, and a codec 5 according to instructions from the central processing unit 4. This is a switch unit that selects and connects one of the data interfaces I/F6.

4 receives and takes the control signal carried on the signal channel D separated by the line 1/F circuit 2, and transmits it to the switch section 3 and the LCD 13.
This is a central processing unit that controls the audio circuit 7 and the I10 controller IO.

5 is an audio circuit 7 for transmitting the digital signal between the switch section 3 and the switch section 3.
6 is a data I/F that converts the digital signal between it and the switch unit 3 into a signal that can be handled by the data terminal. 7 is a data I/F that exchanges signals with the codec 5, and a receiver 8. and an audio circuit for controlling the transmitter 9, and 8.9 is a receiver and a transmitter of the telephone set.

10 is a controller 110 for connecting the audio circuit 7, numeric keypad 11 and ringer 12 to the central processing unit 4; 11 is a numeric keypad for inputting numbers; 12 is a ringer for generating a ring tone; 13 is a numeric keypad for inputting numbers; This is an LCD that displays a calling party number etc. according to instructions from the central processing unit 4.

Further, the above-mentioned information channels B, , B can be used for both telephone and data communication.

Next, the operation will be explained. When a call is received from digital subscriber interface 1 of l5DN, line 17
Based on the control signal of the signal channel D separated by the F circuit 2, the central processing unit 4 issues a command to the switch section 3 to display the calling party number on the LCD 13. information channel B or B2
Connect to the codec 5 side, and connect the I10 controller 10
When the ringer 12 is made to ring through the ringer 12 and the audio circuit 7 responds in accordance with the ringing, the central processing unit 4 recognizes the response via the controller 10 (10), creates a response signal, and sends it to the signal channel D to send it to the line (2). /F circuit 2 is caused to send a response signal to digital subscriber interface 1, and voice circuit 7 is placed in a talking state.

The voice of the called party's telephone is sent from the handset 9 to the codec 5 as an analog voice signal, which converts it into a digital signal and sends it to the information channel B.

Or, information channels B + , B t are placed on B8 and sent to line 1/F circuit 2 in MI/F circuit 2.
and signal channel D, and the multiplexed signal is sent to digital subscriber interface l. On the other hand, the other party's voice is transmitted through the opposite route, converted from a digital signal to an analog signal by the codec 5, and sent to the receiver 8.

When communication by a data terminal occurs during a voice call as described above, the central processing unit f4 issues a command to the switch unit 3, and the switch unit 3 switches the information channels B, , B, to whichever is not being used. Since it connects to data 1/F6,
Information channel B,,B.

Simultaneous communication is also possible.

[Problem to be solved by the invention]

Since conventional digital telephones are configured as described above, there have been problems in that when a voice call is being made, if another voice call or a call from a different type of terminal is received, the call is ignored.

This invention was made to solve the above-mentioned problems, and even when a voice call is received during a voice call or a call from a different type of terminal, the calling party that is included in the control signal at this time To provide a digital telephone that can store a telephone number (hereinafter referred to as a calling number) and, after a voice call ends, select the stored calling number and make a call.

[Means to solve the problem]

The digital telephone according to the present invention has a means for storing a calling number when receiving another voice call or a call from a different type of terminal during a voice call, and a means for rejecting another voice call or a call from a different type of terminal. , a selection key for obtaining the calling number stored in the storage means after the end of the voice call, and means for automatically dialing the obtained calling number.

[Function] The digital telephone according to the present invention, when receiving another voice call or a call from a different type of terminal during a voice call,
The calling number is stored by the storage means, the incoming call is rejected by the incoming call rejection means and the voice call is continued, and after the voice call ends,
The calling number is selected from the storage means by operating the selection key, and the calling number is automatically called by the automatic calling means.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to the drawings. 1st
In the figure, 1 to 13 are the same as the components of the conventional digital telephone already described, but the central processing unit 4 includes incoming call rejection means and automatic dialing means, and 14 is a device that responds when an incoming call is received during a voice call. A storage memory serves as a storage means for storing the calling number of the calling party, and 15 is a selection key for obtaining the calling number whose incoming call was rejected after the end of the voice call.

Next, an embodiment will be described with reference to the sequence diagram in FIG. 2 and the flowcharts in FIGS. 3 to 5.

First, the process of memorizing the calling number will be explained. A voice call becomes active when a call is made from the digital telephone according to the present invention or when a call is received from the 15DN through the digital subscriber interface 1, but in the sequence diagram of FIG. 2, steps 5T2-1 to 2-6 are performed. Suppose that a voice call is in progress due to a call made from a digital telephone.
At the same time as the call is made, the central processing unit 4 sets the voice in use flag. During a voice call like step 5T2-7 (hereinafter simply referred to as step 5T2-7)! When an incoming call is received from the SDN, the signal channel D is separated by the line 1/F circuit 2, and the control signal carried on the signal channel D is sent to the central processing unit 4. The central processing unit 4 analyzes the control signal and determines whether the incoming call is a voice call (step 5T).
3-2) Is it data communication (step ST3-3)?
Separate by m. If it is an incoming data communication call, the data is not currently in use (step 5T3-6), so the incoming data communication call is accepted (step 5T3-9), or if it is a voice call (step 5T3-2). ), since the voice call is currently in progress (step 5T3-11), the central processing unit 4 extracts the calling number included in the control signal and stores it in the storage memory 14 (steps 5T2-8 and 5T3-12). , at this time, the LC is sent to notify the incoming call.
The calling number may be displayed on the D13.Next, in order to reject the incoming call, the central processing unit 4 sends a release completion signal (RBL).
C0RP) and put it on signal channel D, and connect it to line 1.
/F circuit 2 and the digital subscriber interface 1 to the I5DN. When ending a voice call, disconnect from the digital phone or ■SDN, but
In the sequence diagram shown, it is assumed that the connection was disconnected from the digital telephone. First, when the handset of the audio circuit 7 goes on-hook, the central processing unit 4 recognizes this via the I10 controller 10, creates a disconnection signal (DisC) and puts it on the signal channel D, and connects the line I/F circuit 2 and digital connection. 15DN through the user interface 1 (step 5T2-11).

Also, when a call is received from a different type of terminal, the calling number is stored in memory 1.
4 (step 5T3-4), a release completion signal is given to the ISDN (step 5T3-5) and the incoming call is rejected.

Next, the calling number 1Lffi and the process of automatic calling will be explained. After the voice call is over, when the caller number confirmation button in the selection key 15 is pressed (step 5T4-1), the central processing unit 4 obtains the pointer value of the most recently stored caller number (step 5T).
4-2), and sets the calling number call flag for making a call by referring to the calling number (step 5T4-3), and then obtains the calling number from the storage memory 14 based on the pointer value of the calling number (step 5T4-3). 5T4-4), the calling number is set in the calling register (step 5T4-5). At this time, the calling number may be displayed on the LCD 13.

If several calling numbers are stored in the storage memory 14, the pointer value of the most recently stored calling number is obtained by pressing the calling number conversion key in the selection key 15 (step 5).
T4-8), the calling number is obtained from the storage memory 14 (step 5T4-4).

If it is desired to cancel this call, the caller number call flag is cleared by pressing the cancel key in the selection keys 15 (step 5T4-9) and the caller number call flag is cleared (step ST4-10).

When the handset of the audio circuit 7 is off-hook while the calling number calling flag is set (step 5T2-1)
5), the central processing unit 4 recognizes this via the I10 controller 10, moves to the calling state in step 5T5-1), and since the calling party number call flag is set (step S T5-2), the calling party number is Set the calling number set in the calling register to the calling signal in the control signal (steps 5T5-5 and 5T2-16), through the line summer/F circuit 2 and the digital subscriber interface 1.
Transmit by giving it to DN. At this time, the calling number calling flag is cleared (step 5T5-7).

Also, the call made using the numeric keypad 11 (steps 5T5-3 and 5T5-4) is a normal call, and after making the call, the normal connection procedure is followed (steps 5T2-17 to 5T2-21).
) Communication is in progress.

Although the case where there are two information channels has been described above as an example, the present invention is also effective when there is one channel or three or more channels.

〔Effect of the invention〕

As described above, according to the present invention, the digital telephone
When receiving another voice call or an incoming call from a different type of terminal during a voice call, the incoming call is rejected after memorizing the calling number, and after the mass production call ends, the calling number is retrieved from the storage means using a selection key,
Since it is configured to automatically call the calling party's number, even if the call is rejected, the caller's phone number will be known and the call can be made automatically after the voice call ends, so the call will not be ignored and the call will not be ignored and the number key will be pressed again. This has the effect of making it possible to make a call to a rejected caller without any trouble.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of a digital telephone according to an embodiment of the present invention, FIG. 2 is a sequence diagram showing connection and disconnection performed by this embodiment, and FIG. 3 is an incoming call of the digital telephone according to this embodiment. 4 is a flowchart showing the operation from the memory to storing the calling number. FIG. 5 is a flowchart showing the operation when automatically dialing the calling number. FIG. 6 is a block diagram showing the configuration of a conventional digital telephone. 1 is the digital subscriber interface, 2 is the line 1/F
circuit, 4 is a central processing unit (incoming call rejection means and automatic calling means), 7 is an audio circuit, 10 is an I10 controller, 13
1 is an LCD, 14 is a storage memory (storage means), and 15 is a selection key. In addition, in the figures, the same reference numerals indicate the same or equivalent parts. Patent applicant Mitsubishi Electric Corporation

Claims (1)

[Claims] In a digital telephone connected to a digital network through a digital subscriber interface in which an information channel carrying voice or data signals and a signal channel carrying control signals are multiplexed, an incoming voice call or a foreign call is detected during a voice call. storage means for storing the calling party's telephone number when receiving an incoming call from a terminal; and after storing the calling party's telephone number in the storing means, receiving the incoming voice call from another voice call or from a different type of terminal; an incoming call rejection means for rejecting an incoming call; a selection key for requesting the telephone number of the calling party stored in the storage means after the end of the voice call; and an automatic dialer for automatically dialing the requested telephone number of the calling party. A digital telephone characterized by comprising a means for making a call.