JPH02190065A - Telephone set - Google Patents

Abstract

PURPOSE:To attain simultaneous call between plural to plural telephone sets by providing a 2nd mixer mixing a signal from a 1st mixer mixing a transmitter and a call signal generator and a signal received from other selected line and a 3rd mixer mixing signals received from a selected line and sending the mixed signal to a receiver. CONSTITUTION:The 1st mixer 40 mixes signals from a microphone 1 and a call signal generator 3. A line selection means is constituted with line switches 51-53 capable of setting optionally the connecting or interrupting state of 3 lines 71-73 independently respectively and a line switch controller 60. Second mixers 71-73 mix a signal from the 1st mixer 40 and a signal received from the line selected by the line switches 51-53 and send the mixed signal to each relevant line. A 3rd mixer 90 mixes signals received from the lines selected by the line switches 51-53 and sends the result to a speaker 2. Thus, simultaneous calling between plural to plural telephone sets is smoothly implemented.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to an improvement in a wired telephone (hereinafter simply referred to as a telephone) used, for example, in an office or a general home.

(Prior Art) Telephones are now widely used in all places, such as offices and homes.

A normal telephone uses only one line and allows only one-to-one calls at the same time, but in recent years, telephones that can switch between multiple lines have also been used.

FIG. 5 is a block diagram showing an example of the configuration of a conventional telephone having a function of switching between multiple lines. In FIG. 5, reference numeral 1 denotes a microphone as a transmitter, which has a function of converting an audio signal into an electrical signal. Further, 2 is a speaker serving as a receiver, and has a function of converting an electric signal into an audio signal. Furthermore, 3 is a calling signal generator, which has a function of generating a calling (identification) signal for selecting a partner by operating a dial or button. Here, currently widely used calling signals are based on the number of intermittent signals or based on the frequency of a low frequency AC signal.

On the other hand, 4 is a mixing/separating circuit, which mixes the signals from the microphone 1 and the ringing signal generator 3 and connects the signals to the line switching unit 5.
It has a function of sending a signal from the line switching device 5 to the speaker 2. Further, 5 is a line switching device, which is a switch having a function of connecting only one line out of a plurality of lines. Furthermore, 6 is a line switching device control device, which has functions such as controlling the line switching device 5 so as to automatically select one of the plurality of lines that is receiving a call. Furthermore, numeral 7 denotes wired telephone lines (hereinafter simply referred to as lines), and although three lines are shown in the figure, the same applies if there are two or four or more lines.

A plurality of telephones having such a configuration are usually connected in parallel to a plurality of lines.

This is because the purpose of using multiple lines is to efficiently distribute and process a large number of communications to several telephones. That is, the purpose is to efficiently perform one-to-one communication.

By the way, with the above-mentioned conventional telephone, only one-to-one calls can be made. Therefore, in order to achieve mutual information transmission between kings and above, it is either necessary to conduct multiple one-on-one calls, or one person acts as the coordinator and passes on information orally. You have to use that method. However, in the former method, I 1 / 2 n (
n -1)) one-to-one calls are required, and the larger the number of participants, the greater the number of calls required.

Furthermore, in the latter method, not only does it require a great deal of effort on the part of the coordinator, but there is also a risk that information will not be conveyed accurately.

In this way, for any method, in order to conduct a form of communication such as holding a meeting, in which another person repeatedly issues other information based on information issued by one person, , impractical in terms of time and effort.

Therefore, in order to solve this problem, it is possible to use a special type of line or use a multi-to-multiple communication device, but the cost would be very high and it would be economically undesirable. .

It was.

The purpose of the present invention is to enable simultaneous calls between coal numbers and carrier numbers by using existing lines for one-to-one calls as they are, without using a special type of line or a multi-to-many dedicated communication device. It is an object of the present invention to provide a highly functional telephone capable of efficiently carrying out operations while reducing time and labor.

[Structure of the Invention] (Means for Solving the Problems) In order to achieve the above object, the telephone of the present invention includes a transmitter that converts voice into an electric signal, a receiver that converts the electric signal into voice. , a ringing signal generator that generates a ringing signal for selecting a calling party, a first mixer that mixes signals from the transmitter and the ringing signal generator, and a plurality of lines independently and arbitrarily. Selectable line selection means and a signal from a first mixer provided corresponding to each line.

a second mixer that mixes signals received from other lines selected by the concave line selection means and sends the mixed signals to the respective corresponding lines;
and a third mixer that mixes the signals received from the line selected by the line selection means and sends the mixed signal to the receiver.

(Function) Therefore, in the present invention, by employing the following means, it is possible not only to make a one-to-one conversation, but also to allow each caller to transmit information to all callers at the same time. information from all callers can be received simultaneously. In other words, it is possible to carry out simultaneous multi-to-multiple calls as smoothly as if all the users were together.

And in this case, without using any special form of line,
Moreover, since the existing one-to-one communication line can be used as is without using a multi-to-multiple communication device, the cost does not become high.

(Example) First, the concept of the present invention will be explained.

FIG. 4 is a diagram showing the relationship between input and output signals of the telephone according to the present invention. In Figure 4, 20°21.22.2n
is an audio signal input to the telephone main body 10. 20 is an input signal from microphone 1, 21, 22, 2n are input signals from each line, and the contents of each are tO
,il.

i2. Represented by ill. Also, 30, 31, 32°3n
is an audio signal output from the telephone main body 10. 30
is the output signal to speaker 2, 31゜32.3n is the output signal to each line, and their contents are expressed as O(,,0
Represented by 1,02,On.

Although input and output are shown separately in the figure for convenience of explanation, input and output to and from the line are actually performed in both directions using the same signal line.

Here, the output of the telephone main body 10 is the sum of all inputs other than the input that is paired with the telephone main body 10.
Configure. That is, Oj-uni, the phone body 10
Configure. Also, if there is no risk of oscillation,
The human power of the team may also be added to the output. That is, Oj -Now, consider a situation in which the lines of such telephones are connected to conventional telephones used by callers 1 to n. In this case, caller j (0≦
Attention is paid to the output signal of j≦n, j is an integer). After the output signal ij of the caller j is input to the telephone main body 10,
Since it is output to all Oo to On or all except Oj, all parties can receive what is said by party j. On the other hand, conversely, caller j (0≦j≦
n, j are integers) are input to the human input signals. caller j
It is the sum of the outputs of all callers except person j. Therefore,
Caller j can listen to what all callers are saying. As described above, each caller can simultaneously transmit information to all callers, and can also receive information from all callers simultaneously. That is, in this case, with (n+1) considerations, it is possible to carry out a conversation smoothly as if all the participants were together.

Hereinafter, an embodiment of the present invention based on the above concept will be described in detail with reference to the drawings.

Note that here, the case where the aforementioned n is set to 3 will be described as an example.

FIG. 1 is a block diagram showing an example of the configuration of a telephone according to the present invention. The same elements as those in FIG. 5 are given the same reference numerals, and the explanation thereof will be omitted, and only the different parts will be described here. In FIG. 1, 40 is a first mixer, which mixes the signals from the microphone 1 and the calling signal generator 3.

Further, 71, 72, and 73 are lines individually connected to the telephone of the caller (n-3). Furthermore, 51.52.5
3 is a line switcher that can arbitrarily set these three lines 71, 72, and 73 to connect or disconnect independently, and 60 is a line switcher that can connect or disconnect these three lines 51, 72, and 53. The line switching device 51, 52, 53 and the line switching device control device 60 constitute a line selection means.

On the other hand, 81.82.83 is each line 71°72.73
are second mixers provided corresponding to the signals from the first mixer 40, respectively.
Other lines 72 and 73 selected in 52.53 and 71 and 7
The signals received from 3.71 and 72 are mixed and sent to the corresponding lines 71.72.73. Further, 90 is a third mixer, and line switching 7s51°52
．． The signals received from the line selected in step 53 are mixed and sent to the speaker 2. That is, in this embodiment, the connections between each mixer are made such that the output of the telephone is the sum of all human inputs other than its own paired input.

Here, the second mixers 81, 82, 83 and the third mixer 90 are configured using, for example, an operational amplifier OP and a large number of resistors R1 to R4, as shown in FIG. These circuit constants can be determined based on the impedance of the circuit, the ratio between the required output level and the human power level, etc.

Next, a description will be given of the operation of the telephone configured as described above when a four-party conversation is made.

First, the case of calling the other party will be described.

In this case, the calling signal generator 3 generates a calling signal for calling the other party by operating a dial or a button. Then, this calling signal is transmitted to the first mixer 40
, through the second mixers 81, 82, 83, and sent to the line switches 51, 52, 53. On the other hand, the line switch control device 60 selects one of the line switches 51, 52, or 53 provided for the line used for calling,
A calling signal is sent only to the line connected to the selected line switch, and the other party is thereby called.

Then, the line switch control device 60 makes the call three times while sequentially selecting the line switch installed on the line used for the call, thereby making it possible to call all three parties.

Next, a case will be described in which the calling party is completed and information is transmitted between the four parties. In this case, the voice of the user of the telephone is converted into an electrical signal through the microphone 1. Then, this electric signal passes through the first mixer 40 and the second mixer 81, 82.83 to other lines 72, 73.71, 73. The signals received from 71 and 72 are mixed, and from this the corresponding lines 71°72.7
Sent on 3rd. Also, the voice of the person on the other end of the call will be heard on line 7.
1, 72.73 through the line switch 51.52.53, and the second mixer 81.82.83 connects microphone 1 and other lines 72 and 73.71 and 73.
are mixed with the received signals from the corresponding lines 71,
72° 73, mixed by the third mixer 90, and also sent to the speaker 2. This allows the voice to be transmitted to all call parties and the user of the telephone at the same time.

As mentioned above, with the telephone of this embodiment, information sent by each caller can be received by all callers at the same time, so simultaneous multi-to-multiple calls, that is, conferences using the telephone, are possible. It becomes possible to smoothly carry out such forms of communication. And at this time,
A person other than the person using this telephone can use a conventional telephone as a telephone, and can also use a conventional line for one-to-one calls as a telephone, so the entire device is It is economically advantageous because the cost does not increase. In addition, by selecting only one line using a line switch, you can make one-to-one calls as a normal telephone, and you can make multiple calls without sacrificing the functionality of a conventional telephone. It is possible to manufacture a telephone by simply adding it, and it is possible to obtain a telephone with extremely high functionality.

It should be noted that the present invention is not limited to the embodiment described in L, but can be similarly implemented in the following manner.

(a) As shown in FIG. 3, by omitting all the mixers mentioned above and connecting them directly, it is possible to realize a telephone set that is even cheaper in equipment and does not require an external power source.

(b) In the above embodiment, the case where there are three lines has been described, but this invention is not limited to this, and the present invention can be similarly applied to cases where there are two lines or multiple lines of four or more lines. It is possible.

〔Effect of the invention〕

As explained above, according to the present invention, one person
Multiple-to-one calls using the existing line for one-to-one calls!
Simultaneous calls for several hours.

A highly functional telephone that can be used efficiently while reducing labor can be provided.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing one embodiment of a telephone according to the present invention, FIG. 2 is a circuit diagram showing an example of the configuration of a mixer in the same embodiment, and FIG. 3 is a block diagram showing another embodiment of the present invention. ,
FIG. 4 is a diagram for explaining the present invention in detail, and FIG. 5 is a block diagram showing an example of a conventional telephone. DESCRIPTION OF SYMBOLS 1... Microphone, 2... Speaker, 3... Calling signal generator, 40... First mixer, 51.52° 53... Line switching device, 60... Line switching device Control device, 71.72.73...Line, 81,82.83...
- Second mixer, 90... third mixer. Applicant's representative Patent attorney Takehiko Suzue 1st ward 2nd ward

Claims (1)

[Scope of Claims] A transmitter that converts voice into an electrical signal, a receiver that converts the electrical signal into voice, a ringing signal generator that generates a ringing signal for selecting a calling party, and the transmitter. and a first mixer for mixing signals from the paging signal generator; line selection means capable of independently and arbitrarily selecting a plurality of lines; a second mixer that mixes the signal from the mixer and the signal received from the other line selected by the line selection means and sends the mixed signal to each corresponding line; A telephone set comprising: a third mixer that mixes received signals and sends the mixed signals to the handset.