JPS60216659A - Connector for conference telephone set - Google Patents

Abstract

PURPOSE:To attain telephone conference simultaneously with participants located at plural locations by using a 2-wire/4-wire converter so as to separate a 2-wire telephone line into the transmission and reception lines and connecting respectively the separated lines to a distribution amplifier and a mixing amplifier. CONSTITUTION:After a signal inputted from optional 2-wire telephone lines W1-Wn to a conference telephone set connector C is inputted via 2-wire/4-wire converters H1-Hn and reception lines R1-Rn to distribution amplifiers RA1- RAn and amplified, the result is transmitted from (n-1)-terminal to mixing amplifiers SA1-SAn. In this case, no signal is transmitted to the own communication line. An output of the amplifiers SA1-SAn is outputted to transmission lines S1-Sn and the signal of the lines S1-Sn is transmitted to all remaining lines except the lines W1-Wn inputted via the converters H1-Hn.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a connection device for a conference call that enables a conference call with parties at multiple locations.

(Prior art) When holding a conference call between remote locations, such as between a head office and a branch office, if the other party is in one location, one
This is achieved by connecting two communication lines and installing conference telephone equipment at both locations. However, when the parties to the call are dispersed in multiple locations, for example, when a conference is held between the head office, branch office A, and branch office B, two conference phones are installed at each location, and communication between the head office and branch office A is carried out. There is no need to use troublesome methods such as connecting communication lines between the head office and branch office B and between branch office A and branch office B, and using separate conference phones each time the person with whom you are speaking is located in a different location. did not become.

(Objective) The present invention has been made in view of the above-mentioned current situation, and an object of the present invention is to enable telephone conferences to be held simultaneously with parties who are located in multiple locations.

(Structure) In order to achieve such an object, the present invention provides a summer one piece (n
is an integer greater than or equal to 2), a 2-wire to 4-wire converter, a distribution amplifier having (n-1) output terminals, and a (++-1) input terminal The two-wire telephone line is separated into a transmitting side line and a receiving side line by the two-wire to four-wire converter, and each separated receiving side line is connected to the distribution amplifier. When connecting the transmission side lines to the mixing amplifiers, and distributing each of the (n-1) output terminals of the distribution amplifier to each of the (nl) input terminals of the mixing amplifier, the same A conference telephone connection device is constructed by connecting to each of the input/output terminals, except for a combination of a distribution amplifier and a mixing amplifier associated with a two-wire telephone line.

(Example) Hereinafter, the present invention will be described in detail based on an example shown in the drawings. The figure is a block diagram of the conference telephone connection device of this embodiment. This conference phone connection device C has n (11
2-wire to 4-wire converters H1 to Hn, distribution amplifiers RA and ~RAn, and mixing amplifiers SA and ~SAn are respectively provided corresponding to the two-wire telephone lines W1 to Wn (integer of 2 or more). It is being The 2-wire to 4-wire converters H1 to Hn are
For example, it has a hybrid filter and a balanced circuit network, and these 2-wire to 4-wire converters H1 to Hn convert two-wire telephone lines W1 to Wn into receiving lines R, -Rn and transmitting lines 81 to 81.
It is separated into Sn. Then, the separated receiving line R
1 to Rn are respectively connected to the input terminals of the corresponding distribution amplifiers RA l to RA n, and similarly separated transmission side lines 81 to Sn are connected to the respective corresponding mixing amplifiers SA, to S
They are respectively connected to the output terminals of An. The above distribution amplifiers RA, ~RAn each have (n-1) output terminals 01.
210131...On.11-1 is provided. Further, the mixing amplifiers SA and ~SAn each have (nl) input terminals I + 2t I + 31"' I n " 11-
+ is provided.

The (n-1) output terminals of each of the distribution amplifiers RA and -RAn are connected one by one to the (i-1) input terminals of the mixing amplifiers SA and -SAn.

In this case, connection of combinations of distribution amplifiers RA, .about.RAn and mixing amplifiers SA, .about.SAn associated with the same two-wire telephone line is excluded.

That is, the interconnection between the distribution amplifiers RA, ~RAn corresponding to the th (k=1.2...n) two-wire telephone line Wk and the mixing amplifier fffA n S A l-S A n is as follows. do not have. Therefore, both the distribution amplifiers RA, ~RA n and the mixing amplifiers SA, -8An are Okk, I kk (k=
1, 2, . . . = n) terminals are omitted from the figure.

In the above configuration, signals input from any two-wire telephone lines w1 to Wn to the conference phone connection device C are sent to the 2-wire to 4-wire converter 1-1, ~■]11, and the receiving side lines R1 to Rn. The signals are input to the distribution amplifiers RA, -RAn via the signals. The signals input to the distribution amplifiers RA, ~RAn are amplified here, and then sent from each of the (n-1) output terminals to the mixing amplifiers SA, ~RAn.
Sent to SAo. At this time, the th (k=1.2
．． . . n), there is no connection between the distribution amplifiers RA, ~RAn and the mixing amplifiers SA, ~SAn, and no signals are transmitted to their own communication lines, so the system will not be in a noisy state. The mixing amplifiers SA, -SAn mix and amplify input signals and send the mixed signals to the transmission side lines 81 -Sn. Therefore, the signals of the transmission side lines 81 to Sn are inputted again via the 2-wire to 4-wire converters H1 to Hn to the 2-wire telephone lines W, -
It is transmitted to all remaining lines except Wn. Therefore,
For example, if this conference phone connection device is installed at the head office,
If you select and connect the conference telephones set up at branch office A, branch office B, etc. to the empty line of this conference telephone connection device, you can connect the connected two-wire telephone lines to each other. With this, each caller on each line can listen to what all other callers are saying, or have all other callers hear what he or she is saying, making it possible to have a smooth conference call.

Note that the conference telephone may be a conference telephone device such as a telephone with a speaker that allows multiple callers to participate at one place, a conference telephone with multiple receivers, or a regular telephone that can accommodate one caller.

Further, the call line connecting the connection device for plenary conference calls and each caller may be a public line or a private line.

(Effects) As described above, according to the present invention, it is now possible to conduct a telephone conference at the same time with callers located in multiple locations, whereas conventional telephone conferences were limited to two remote locations. can.

Therefore, mutual communication becomes quick and the meeting can proceed efficiently, which is an excellent effect.

[Brief explanation of the drawing]

The drawing is a block diagram of a conference telephone connection device showing an embodiment of the present invention. C... Conference telephone connection device, W1-Wn... 2-wire telephone line, H1-Hn... 2-wire to 4-wire converter, RA,
~RAn...Distribution amplifier, SA, ~SAn...Mixing amplifier, R2-Rn...Receiving side line, S, ~Sn...
- Sending side line. Applicant Tuck Wire Co., Ltd. Patent Attorney Kazuhide Oka 1)

Claims (1)

[Claims] (1) A 2-wire to 4-wire converter that individually corresponds to n (n is an integer of 2 or more) two-wire telephone lines, a distribution amplifier having (nl) output terminals, and (nl) A mixing amplifier having an input terminal is provided, each of the two-wire telephone lines is separated into a transmitting side line and a receiving side line by the two-wire to four-wire converter, and each separated receiving side line is connected to the above-mentioned distribution line. In connecting each transmission side line to the amplifier and to the mixing amplifier, and distributing each of the (formerly 1) output terminals of the distribution amplifier to the (nl) human power terminals of the mixing amplifier, respectively. , a connection device for a conference telephone, which is connected to each of the input/output terminals except for a combination of a distribution amplifier and a mixing amplifier that are associated with the same two-wire telephone line.