JPS63206062A - Digital telephone set for memorandum communication - Google Patents

Abstract

PURPOSE:To inform a memorandum or a message or the like to an opposite party even if the called party is busy or absent by using a signal channel packet so as to send message information. CONSTITUTION:When a telephone set 22 makes a phone call to a telephone set 20 while the telephone set 20 and a telephone set 21 are talking, since a busy tone is sent to the telephone set 22, the telephone set 22 depresses a memo sending key 12 and a control circuit 13 sends a cut-off signal and reads a message from a message memory 7, and reads a number called previously from a radial memory 6 and sends a signal to a network 23 through a channel packet. In receiving it, the network 23 sends a packet to the telephone set 20 via a packet processing section, in receiving the packet, the control circuit 13 of the telephone set 20 displays the telephone number and message on a display device 8.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention provides a method for notifying a business by an alternative means such as a memo or a message in telephone communication when the other party is busy or absent and cannot have a direct conversation with the other party. It concerns a digital telephone set.

[Conventional technology]

Conventionally, in a telephone set, for example, when C wants to call A and A is on the phone with B, C is only sent a busy tone from the network, and C cannot talk to A. Furthermore, when A is absent, only a ring pack tone is sent to C. In such a case, C typically waits for a while and then calls A again. In this case, if A was previously on the phone or was absent, C has the inconvenience of having to call again. There are also cases where you forget to call back.

There is also a so-called call-waiting service that interrupts a call to receive a call, but in this case, not only is this service unavailable unless the person receiving the call (A in this case) subscribes to this service, but it is also difficult for A to call B. Even when you do not want to be interrupted because it is an important matter, the call is interrupted and the call ends up interrupting the conversation, which is inconvenient.

[Problem that the invention seeks to solve]

The present invention aims to solve the problem in telephone communication that it is inconvenient to communicate with others when the called user is busy.

[Means for solving problems]

The present invention provides a digital telephone connected to a digital network having a signal channel separate from an information channel for transmitting voice information, which includes: input means for inputting message information; storage means for accumulating input message information;
A sending means for sending accumulated message information as a signal channel packet, an activation switch for activating the sending means, a receiving means for receiving message information sent as a signal channel packet, and a receiving means for receiving message information sent from the network. The device is equipped with display means for displaying the telephone number of the caller and the message sent from the caller.

[Effect]

By inputting message information through the input means and turning on the activation switch, the message information can be sent out as a signal channel packet.

In the telephone on the receiving side, the receiving means receives the message information, and the display means displays the other party's telephone number and the message.

〔Example〕

Digital networks have developed in recent years, and the International Telegraph and Telephone Consultative Committee (CCI TT) is proceeding with the standardization of interfaces that digitize up to subscriber lines. The interface recommended by the committee has the following characteristics:

b) Even though there is only one physical line, it logically has two information channels (referred to as B1 and B2 channels, respectively) and (referred to as D channel).

口) Up to 8 in-house devices can be connected to one line using path format.

c) In addition to the telephone number, a number (referred to as a sub-address) that specifies in-house equipment on the same bus can be assigned.

2) In addition to the normal network connection control signal, a transmission area for inter-user data is reserved for the calling signal.

e) When making a call, only the signal channel can be used without using the information channel.

An embodiment of the present invention configured using this interface will be described below based on the drawings.

First, the configuration will be explained.

FIG. 1 shows the configuration of a digital telephone according to this embodiment. In the figure, 1 is a handset, 2 is a communication circuit, and 3 is a handset.
is the dial, 4 converts the audio signal into a digital signal,
A codec that converts digital signals into audio signals,
5 is an interface circuit that performs digital synchronization control with the network, disassembling and assembling connection control signals and digital voice signals; 6 is a redial memory for recording the last dialed telephone number; 7 is a telephone Message memory that stores simple messages to be sent when the called party is busy or absent; 8 displays the dialed telephone number on a monitor; displays the calling number sent from the network when a call is received;
A display for displaying a simple message from the telephone of the person making the call; 9 a display drive circuit for driving the display 7; 10 a sounder for sounding a ringer when a call is received; 1
Reference numeral 1 denotes a ringer sound generation circuit that generates a ringer sound output from the sounder 10, 12 a memo sending key for sending messages stored in the message memory 7, and 13 a connection control signal exchange with the network and reception of incoming calls. control of the ringer sound generating circuit 11 at the time of the call; control of the display drive circuit 9 for displaying the dial monitor, calling party number, and message from the other party; and control of the message memory 7 when the memo sending key 12 is pressed.
14 is a key switch interface circuit for connecting the dial 3 or memo sending key 12 to the control circuit 13; 15 is each circuit of the digital telephone; This is a power supply circuit that supplies the necessary power to the Reference numeral 16 denotes a memory for storing the telephone number and message of the other party when it cannot be displayed immediately, such as when there are multiple messages from the other party during a call.

Figure 2 shows the configuration of the connection system. In the same figure, 20 is operator A's telephone A121 which is communicating with operator A. Operator B's telephone B122 is operator C's telephone which is making a telephone call to operator A while operators A and B are talking. Telephone 0123 is a network. In the following description, the components of telephone A are distinguished by adding a after the number, those of telephone B are given b, and the parts of telephone C are marked with C.

In FIG. 2, the digital network 23 has a packet processing section, and packet information is transmitted to the other party's terminal via the packet processing section through the signal channel. In addition, the packet information, including the telephone number of the connection destination, is 25 times per transmission.
Assume that it is possible to send 0 octets of information. A telephone number is usually 10 octets long, including the area code, and a maximum of 240 octets can be sent as message information that will be delayed.

Further, it is assumed that the transmission message memory 6 stores a message such as "DEN WASI TEKDA SAI".

Messages can be stored using methods such as: - handwritten input using a digitizer, etc., - storing arbitrary messages using a full port, etc., and - storing fixed messages in ROM in advance. However, in the present invention, messages can be created. The method is not important, and here it is assumed that the message is configured by a fixed message in the ROM (2).

Furthermore, there is also a method of storing multiple messages in the sending message memory 7 and selecting one of them to send.
This can be easily realized by configuring a plurality of selection keys in correspondence with each other instead of the memo sending key 12. Since the number of messages is not essential to the present invention, FIG. 1 shows the case of one message.

Next, normal call/receive operations will be explained.

FIG. 3 is an example of the flow of the call/receive operation of the control circuit 13. Further, FIG. 4 is an example of a signal sequence of the telephone 20 (A), the telephone 21 (B), and the network 23.

When operator A goes off-hook, the control circuit 13a becomes a dial input method. Operator A turns the dial 3a and inputs B's telephone number. Once the phone number is entered,
The control circuit 13a controls the display drive circuit 9a to monitor and display the input telephone number on the display 8a, and records the input telephone number in the re-dial memory 6a. Furthermore, when the operator A presses "#" to end the dial input, the control circuit 13a sends a calling signal and the dialed telephone number to the network 23 through the interface circuit 5a. In addition, in the digital signaling system, in order to control multiple calls using one signal channel, a call number is assigned that associates a connection control signal with a call. It is assumed that signals are exchanged corresponding to a call between telephones A and B.

When the network 23 receives these signals, the telephone 21 (B)
The incoming call signal and the telephone number of the telephone 20(A) are sent to the telephone 20(A). These signals are transmitted to the control circuit 13b through the interface circuit 5b. By receiving these signals, the control circuit 13b knows that the call has arrived at the telephone 21(B), and first, the ringing sound generating circuit 11
b is controlled to emit a ringer sound from the sounder 10b.

Furthermore, the calling number sent from the network (in this case, telephone 20)
(A)'s telephone number) is displayed on the display Wj8b by controlling the display drive circuit 9b. Furthermore, the control circuit 13b
Sends a call confirmation signal to notify that the ringing sound has been activated. When the network 23 receives this call confirmation signal, it generates a ringback tone (RBT) and calls the caller's telephone 2.
0(A) using an information channel. This RBT
'1 episode 15120 (A) interface episode lsS
a, codec 4a, call circuit 2a, handset 1a
It can be seen that the call is transmitted to operator A through the call.

After that, when operator B goes off-hook, control circuit 13b
stops the ringer sound generation circuit 11b, stops the ringer sound, sends a response signal to the network 23, and enters a talking state. When the network 23 receives this response signal, the telephone 20 (
A) Connect the communication path to telephone 21(B) and send a response signal to telephone 20(A). When the control circuit 13a of the telephone 20(A) receives the response signal, the control circuit 13a enters a talking state, and the telephone call between the telephone 20(A) and the telephone 21(B) is performed using the handset la, the telephone circuit 2a, and the codec 4.
A, the interface circuit 5a, the network 23, the interface circuit @sb, the codec 4b, the 371-talk circuit 2b, and the handset 1b allow communications to be exchanged between each other.

Next, I will explain how to send a simple message when you make a call and the other party is busy. Here, a case will be described in which a call is made from telephone 22(C) to telephone 20(A) which is busy with telephone 21(B) as described above. FIG. 5 shows an example of the operation flow of the control circuit 13c of the telephone 22(C),
FIG. 6 shows an example of the operation flow of the control circuit 13a of the telephone 20(A). Further, FIG. 7 shows an example of a signal sequence.

As described in the explanation of the call making/receiving operation, assume that operator C makes a call to telephone 8iA while telephone 20(A) and telephone 21(B) are engaged in a call. In this case, the telephone number of the telephone 20(A) is stored in the redial memory 6C of the telephone 22(C) by the control circuit 13c in the same manner as described above.

The network further performs connection processing to telephone 20(A) in the same manner, and transmits an incoming signal and telephone 22 to telephone 20(A).
Send the phone number of (C). Here, the connection control signal from the telephone 22(C) includes "2", which is different from the normal connection control signal.
9, and the control circuit 13a recognizes that the signal is not related to a call to telephone B.

Hereinafter, if the call number is "1", it can be identified that the signal is for telephone 21 (B), and if it is "2", it can be identified that it is a signal for telephone 22 (C).

The incoming signal and outbound number are transmitted to the control circuit 13a through the interface circuit 5a. When the control circuit 13a receives these signals, it knows that the call is coming to the telephone 20(A). In this case, since a call is in progress with telephone 21(B), a busy signal is sent back to the network. When the network 23 receives this busy signal, it generates a busy tone (BT) and sends it to the telephone 22 (C) using the information channel.

BT is an interface circuit 5c and a codec 4c.

The call line llll2c is heard by operator C through the handset IC. Therefore, operator C knows that the person he called (operator A) is busy.

When the operator C presses the memo sending key 12c, the control circuit 13c sends a disconnection signal to the network. For this reason,
The network sends a disconnect signal to telephone 20(A). Telephone 20 (
The control circuit $13a of A) receives this disconnection signal and returns to the communication state with the original telephone set 21(B).

On the other hand, after transmitting the disconnection signal, the control circuit 13a of the telephone 22(C) reads the message from the message memory 7c, and reads the previously called number (here, the number of the telephone 20(A)) from the redial memory 6c. number). Next, the control circuit 13C uses the signal channel packet to send the message read from the message memory 7C to the telephone number read from the redial memory 6C. Signal channel packets: ■ do not use an information channel, ■ must be able to send connection control signals to the other party in a short communication time, and ■ are temporarily stored in the packet processing section of the network if a signal channel is used. This ensures that the call is transferred even if the other party is talking.

When network 23 receives this signal channel packet, it transmits the packet to telephone 20(A) via a packet processing unit. This packet contains the telephone number of telephone 22 (C) generated by network 23 and a message.

From telephone 22(C) to the network and from network 23 to telephone 4512
An example of the signal structure of a signal channel packet to 0(A) is shown in FIG. 8 in comparison with a normal connection control signal. As shown in the figure, the network and telephone can identify that the protocol identifier sent first is different from a normal connection control signal.
Furthermore, since the information in the signal is indicated by its type and length, the control circuit 13a can identify each piece of information.

When the control circuit 13a of the telephone 20(A) receives this packet, it displays the telephone number (here, the number of the telephone 22(C)) and the message in the packet on the display vs8a.

Note that if a packet is received from another phone while displaying on phone 20(A), Memo 1J16a
The memo sending key 12a is displayed when the operator A presses the memo sending key 12a on the empty telephone 20(A).

〔Effect of the invention〕

As explained above, according to the present invention, it is possible to send and receive not only an incoming call from a third party and its telephone number, but also a simple message, which has the following advantages.

a) You can easily make requests such as asking for a call back or leaving your phone open so that you can communicate efficiently.

b) A third party can send a message with a simple operation after confirming that the other party is busy, so there is no hassle.

(2) There are no forced interruptions, so you won't be interrupted by a call in progress.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of the digital telephone according to this embodiment, FIG. 2 is a block diagram of the connection system, FIG. 3 is a diagram showing an example of the call/receive operation flow of the control circuit 13, and FIG. ), a diagram showing an example of the signal sequence of the telephone 21(B) and the network 23, FIG. 5 is a diagram showing an example of the operation flow of the control circuit 13c of the telephone 22(C), and FIG. 6 is a diagram showing the control of the telephone 20(A). FIG. 7 is a diagram showing an example of a signal sequence, and FIG. 8 is a diagram showing an example of a signal configuration. DESCRIPTION OF SYMBOLS 1... Handset, 2... Call circuit, 3... Dial, 4... Codec, 5... Interface circuit, 6... Redial memory, 7... Message memory, 8...・Display device, 9...Display device drive circuit, 1
0... Sounder, 11... Ringer sound generation circuit, 12
... Memo sending key, 13... Control circuit, 14...
... Key switch interface circuit, 15 ... Power supply circuit, 16 ... Memory, 20 ... Telephone A121
...Telephone B122...Telephone C123...Network. Figure 3 Telephone 20 (A) Network 23
Telephone 21(B) Telephone 20(Al, 21(B)
) and the signal sequence of the network 23 Fig. 4 Fig. 5 During a call During a call 6th example of the operation flow of the control circuit 13a of the telephone 20(A)
Figure 7 Signal sequence of telephones 20(A), 22[C) and network 23

Claims (1)

[Claims] A digital telephone connected to a digital network having a signal channel separate from an information channel for transmitting voice information, comprising: input means for inputting message information; and storage means for accumulating input message information. , a sending means for sending the accumulated message information as a signal channel packet, an activation switch for starting the sending means, a receiving means for receiving the message information sent as the signal channel packet, and a sending means for sending the message information sent from the network. A digital telephone for memo communication, characterized in that it is equipped with a display means for displaying a telephone number of a caller and a message sent from the caller.