JPH01202059A - Digital telephone set - Google Patents

Abstract

PURPOSE:To enable a succeeding incoming subscriber to leave a voice message by temporarily storing a message based upon coded voice information sent from the communication opponent in a storage device and at the end of a call, switching the storage device to a coder/decoder and decoding the message based upon the voice information by the coder/decoder. CONSTITUTION:The title telephone set is provided with the storage device 14 for storing coded voice information, and at the time of voice incoming in another information channels when a voice call is executed by using one of plural information channels, the information channel is connected to the storage device 14, a sent message is stored in the storage device 14, and at the end of the voice call, the storage device 14 is switched and connected to the coder/ decoder 6 to send the stored message to the coder/decoder 6 and reproduce the message. Consequently, the digital telephone set capable of leaving a voice message even in case of voice incoming during the period of a voice call independently of the service function of an exchange and prevented from being suddenly interrupted like a catch-phone during the period of the voice call.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention provides an integrated service digital network (hereinafter referred to as 15DN).
This relates to a digital telephone that is connected to a terminal such as a telephone.

[Conventional technology]

Figure 3 shows, for example, the Institute of Electronics and Communication Engineers Technical Research Report 5E85-9.
2 is a block diagram showing the conventional digital telephone set shown in FIG. A line interface circuit which separates and multiplexes two information channels B, B, which can also be used, and interfaces with the I5DN line 1, 3 is a transmitter, 4 is a receiver, and 5 is this transmitter. 3, an audio circuit to which the receiver 4 is connected; 6, a codec connected to the audio circuit 5 for encoding and decoding audio information; 7, a data interface for interfacing with a data terminal (not shown); 8; are the two information channels B1. of the line interface circuit 2. 9 is a numeric keypad for inputting information such as the number of the other party to communicate with; 10 is a ringer that notifies the operator of the digital telephone of an incoming call; 11 is a In addition to controlling the numeric keypad 9 and ringer 10, the audio circuit 5
12 is a display device such as a liquid crystal display on which input key information, communication partner number information, terminal status, etc. are displayed; 13 is the line interface circuit 2, the audio circuit 5, and a switch section. 8, an input/output controller 11, a display device 13, etc. are connected to this processing device, which performs control processing for the entire digital telephone.

Next, the operation will be explained. When there is an incoming voice call from the l5DN line 1, the processing device 13 connects the line interface circuit 2.
The number information of the called communication party is displayed on the display device 12 based on the information on the signal channel D separated by.

The processing device 13 further controls the switch unit 8 to connect the information channel assigned to the voice call, for example, information channel B1, to the codec 6, and instructs the input/output controller 11 to ring the ringer 10. 0Here, when the operator of the digital telephone responds by hooking up or the like upon hearing the ringer 10 ringing, a response signal is sent to the processing device 13 via the input/output controller 11, and an incoming call is received on the signal channel D. On the opposite route to time
5DN line 1. Thereafter, the audio circuit 5 operates according to instructions from the processing device 13 and enters into a talking state.

That is, the voice information from the transmitter 3 is encoded by the codec 6, sent to the switch unit 8, and placed on the information channel B designated for the voice call, and then transferred to the other information channel B by the line interface circuit 2. , and signal channel D, and sent to the l5DN line 1. On the other hand, the voice information of the communication partner from the l5DN line 1 is separated by the line interface circuit 2, and sent to the codec 6 by the switch unit 8.
The signal is sent to the receiver, decoded, and inputted to the audio circuit 5 and the receiver 4.

When communication by a data terminal occurs during such a voice call, the processing device 13 controls the switch unit 8 to change the data interface 7 to an available information channel, that is, information channel B.

Connect to. This allows the data interface 7
Data from a data terminal connected to
, and is multiplexed with other information channel B and signal channel D by the line interface circuit 2 to form the 15DN.
The data sent to the line 1 and from the communication partner is separated by the line interface circuit 2, and sent to the data terminal via the data interface T by the switch unit 8.

In this way, this digital telephone can perform voice calls and data communications at the same time.

Here, if there is an incoming voice call from the second caller Y during a voice call with the first caller Y1 as the communication partner via exchange X, as shown in FIG. 5ETUP requests a voice call from exchange X to telephone 2.
A signal is sent. When the processing unit 13 of the digital telephone 2 on the called side confirms that it is a control signal for call setup requesting a voice call, the processing unit 13 of the digital telephone 2 on the receiving side confirms that the signal is still the first caller Y at that point.
Since a voice call is in progress, a RELCOM signal indicating release completion is sent back to exchange X, and exchange X sends a busy tone to the second caller Y and disconnects the line.

[Problem to be solved by the invention]

Conventional digital telephones are configured as described above, so even though it is possible to simultaneously perform voice calls and data communications using the two information channels B, B, one of the information channels, e.g. If there is an incoming voice call on the other information channel B while making a voice call on B1, the incoming voice call will be rejected and the other information channel B1. It is impossible for both sides to make a voice call at the same time, and even though the phone is a digital phone with multiple information channels, the person who makes the call later only hears a busy tone and does not receive any messages. It has the same inconvenience as an analog telephone in that it cannot transmit information, and it also has the problem that the vacant information channel B1 or B cannot be used effectively.

This invention was made to solve the above-mentioned problems, and when a voice call is made on one information channel and there is a voice call on the other information channel, the person who received the call later can The object of the present invention is to obtain a digital telephone capable of leaving voice messages using an information channel.

[Means to solve the problem]

The digital telephone according to the present invention has one of the information channels.
When a voice call is received on another information channel during a voice call using one channel, a message containing encoded voice information sent from the other party of the voice call is temporarily stored.
A storage device that sends a message based on encoded voice information to a codec at the end of a voice call is connected to a switch unit that selectively connects each information channel to the codec and the data interface.

[Effect]

When a voice call is received on another information channel while a voice call is being made using one of the information channels, the processing device in this invention controls a switch unit to store the information channel on which the voice call was received in a storage device. The communication device temporarily stores messages in the form of encoded voice information sent from the communication partner in its storage means, and when the voice call ends, it controls the switch unit again to switch the storage device to the codec and connect it. , a digital telephone that allows the other party to leave a voice message even if a voice call is received during a voice call by sending the message stored in the storage device to a codec, decoding it, and playing it back. Realize.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings. 1st
In the figure, 1 is the 15DN line, 2 is the line interface circuit, 3 is the transmitter, 4 is the receiver, 5 is the audio circuit, 6 is the codec, T is the data interface, 8 is the switch section, 9 is the numeric keypad, and 10 is the ringer. , 11 is an input/output controller, 12 is a display device, 13 is a processing device, and the third
Since these parts are the same as or equivalent to those in the prior art, which are denoted by the same reference numerals in the figures, detailed explanations will be omitted. Further, 14 is a storage device which is connected to the switch section 3 and stores messages to the communication partner and messages from the communication partner as encoded voice information.Further, the switch section 3 is connected to the line interface circuit 2. The two information channels B, ,B
, and the codec 6, the data interface T, and the storage device 14, and also performs the switching connection of the storage device 14 to the codec 6. In response to an incoming voice call to the other information channel during a voice call, a response message stored in the storage device 14 is sent back to the communication partner to prompt the communication partner to leave a message, and the message from the communication partner is stored in the storage device 14. Each is somewhat different from the conventional ones in that it also has a control function that stores information in the memory.

Next, the operation will be explained. Here, FIG. 2 is a flowchart showing the operation, and a sequence diagram showing the transmission and reception of control signals when a voice call is received on one information channel during a voice call on the other information channel. During a voice call with the first caller Y1 as the communication partner via exchange X, if there is an incoming voice call requesting a voice call from the second caller Y, the voice call is sent to the signal channel D of the l5DN line 1. As 5ETUP signals, the two information channels B,...
B, and received by the line interface circuit 2. This signal channel DO8ETUP signal is separated by the line interface circuit 2 and input to the processing device 13, where it is confirmed that it is a call setting control signal for requesting a voice call. When the processing device 13, which was in the state of waiting for an incoming call (step 5TI), receives the call setting control signal requesting this voice call, it checks whether or not a voice call is already being made (step 5TI). ST2),
If the voice call is not in progress, the process advances to step ST3, where normal response processing is executed, and the process returns to the state of waiting for an incoming call in step STI.

Further, if a voice call is currently being made, for example, through the information channel B1, the process is passed to step ST4, and the switch section 8
controlling the information channel B to connect the information channel B to the storage device 14;
The message ``I'm currently on the phone and can't answer the phone, so please leave a message'', which has been pre-registered as audio information encoded in the storage device 14, is sent to the second message.
Caller Y.

tell. Thereafter, the storage device 14 is connected to the information channel B by the switch section 8 for a predetermined period of time, and the second
The message from caller Y is stored as encoded voice information in the storage device Tf14 (step ST5), and the display device 12 is controlled to display that there is a second voice call. DIS for disconnecting the line with the second caller Y after the predetermined time elapses;
The C signal is sent to exchange X via signal channel D (step 5T6). Based on this, exchange X disconnects the line, returns the REL signal on signal channel D, and
3 completes the release process and sends RELCO to signal channel D.
It sends the M signal and returns to the state of waiting for an incoming call in step STI.

The operator of the digital telephone Z learns from the display on the display device 12 that there is a second voice call, and calls the first caller Y.
When the voice call with 1 is completed, the user operates the numeric keypad 9 to input an appropriate control signal.

The processing device 13 that has detected this control signal controls the switch section 8 to switch and connect the storage device 14 to the codec 6, reads out the message stored therein as encoded voice information, and sends it to the codec 6. This message is decoded by the codec 6, sent through the audio circuit 5 to the receiver 4, and reproduced audibly.

〔Effect of the invention〕

As described above, according to the present invention, a storage device for storing encoded voice information is provided, and when a voice call is being made using one of the information channels, an incoming voice call is received on another information channel. In this case, the information channel is connected to the storage device to store the messages sent, and when the voice call ends, the storage device is switched to and connected to the codec and the stored messages are sent to the codec. Since it is configured to playback, it is possible to leave a voice message even if a voice call is received during a voice call without relying on the service function of the exchange, and the person who is on the voice call can also leave a voice message without relying on the service function of the exchange. This has the effect of providing a digital telephone that will not be interrupted.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing a digital telephone according to an embodiment of the present invention, FIG. 2 is a flowchart explaining its operation and a sequence diagram showing control signal transmission and reception, and FIG. 3 is a block diagram showing a conventional digital telephone. , FIG. 4 is a sequence diagram showing the transmission and reception of control signals. 1 is a line (ISDN line), 2 is a line interface circuit, 6 is a codec, T is a data interface, 8 is a switch section, 13 is a processing device, and 14 is a storage device. In addition, in the figures, the same reference numerals indicate the same or equivalent parts.

Claims (1)

[Claims] A switch unit connected to a line via a line interface circuit that separates and multiplexes a signal channel and a plurality of information channels and operates under the control of a processing device encodes and decodes the plurality of information channels and audio information. In a digital telephone that performs voice calls and data communications by selectively connecting to a codec to be used or a data interface to interface with a data terminal, a storage device for storing encoded voice information is connected to the switch section, and If a voice call is received on another information channel while a voice call is being made using one of the information channels, the information channel on which the voice call was received is connected to the storage device by the switch unit, and the communication partner is connected to the storage device. A message containing encoded voice information from the voice call is temporarily stored in the storage device, and at the end of the voice call, the processing device controls a switch unit to switch and connect the storage device to the codec, and A digital telephone set, wherein the codec decodes a message based on the encoded voice information stored in a storage device.