JP2001024779A - Open voice system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To construct a large-scale system by removing restrictions on the line capacity of a dealing speech system on the number of open voice lines. SOLUTION: An open voice system provided with a speech system 1 and an open voice system 5 is comprised of a main body device 20, which connects a plurality of lines 35 and is provided with a function which encodes signals from lines to multiplex them and a function which demultiplexes and decodes encoded and multiplexed signals to send them to lines, a transmission line 80 through which multiplexed signals are transmitted, terminal equipment 70 which is provided with a function which selects a desired signal out of multiplexed signals on the transmission line to output it to an acoustic device 72 and a function which sends a signal inputted from another acoustic device 73 to the transmission line 80, and a repeating distribution device 60 which is provided with a function which distributes signals received from a multiplexing device through the transmission line to a plurality of transmission lines and a function which combines signals received from a plurality of transmission lines and sends them out to a single transmission line.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates generally to a dealing telephone system for performing financial transactions such as foreign exchange and securities, and more particularly to an open voice system in which a telephone such as exchange rate information is notified from a speaker.

[0002]

2. Description of the Related Art An open voice system of a dealing communication system is usually composed of a main unit and a plurality of terminals. A system in which the main unit of the open voice system is integrated with the main unit of the telephone system has advantages in that data and the like can be collectively managed and operations can be performed from the terminal unit of the telephone system.

On the other hand, a system in which the main unit of the open voice system is provided independently of the main unit of the telephone system has the advantage that the line capacity of the open voice system is not limited by the capacity of the telephone system.

[0004] There are an analog transmission line and a digital transmission line as transmission lines of the open voice system and / or communication system. When a digital transmission line is used, multiplexing is possible and the number of cables can be reduced.

[0005] However, in a system in which the main unit of the open voice system is integrated with the main unit of the telephone system, the number of lines for the open voice is limited by the capacity of the telephone system, and a large-scale system is constructed. It has the disadvantage of being difficult.

A system in which the main unit of the open voice system and the main unit of the telephone system are configured as separate systems is disadvantageous in terms of cost since the telephone system and the open voice are separate systems, and has a disadvantage in terms of operation. Usually, separate operations are performed for the terminal device and the open voice terminal device.

Further, when the transmission path is constituted by an analog transmission path, as the scale of the system increases, the number of cables from the main unit to the terminal unit increases and the cost cannot be avoided. .

When the transmission path is constituted by a digital transmission path, the number of cables can be reduced by multiplexing as compared with the case of an analog transmission path.
It is still necessary to run cables from the main unit to the terminal device at least for the number of terminal devices,
As the size of the system increases, the number of cables also increases, resulting in higher costs.

[0009]

SUMMARY OF THE INVENTION The present invention has been made to solve the problems of the conventional open voice system, and eliminates the limitation of the number of open voice lines due to the line capacity of the telephone system. An object of the present invention is to make it possible to construct a large-scale system, to improve the usability of the system, and to reduce the number of cables between the main unit and the terminal device, thereby reducing costs.

[0010]

SUMMARY OF THE INVENTION The present invention makes it possible to construct a large-scale system by using a telephone system and an open voice system as separate systems so that the number of open voice lines is not limited by the line capacity of the telephone system. . Further, in the present invention, the terminal device of the open voice system is controlled by the terminal device of the communication system in order to improve usability. Further, in order to reduce the number of cables between the main unit and the terminal unit of the open voice system, the transmission line is multiplexed as a digital transmission line, and the main unit and the terminal unit are connected via a relay distribution unit. And reduce the number of cables to reduce costs.

[0011] The invention of claim 1 is a function of connecting an open voice system of a dealing communication system for conducting financial transactions such as exchanges and securities to a plurality of lines, and encoding and multiplexing signals from those lines. A main unit having a function of separating and decoding the coded / multiplexed signal and transmitting the multiplexed signal to a line, a transmission line for transmitting the multiplexed signal, and a desired signal from the multiplexed signal of the transmission line. A terminal device having a function of selecting and outputting to a sound device and a function of transmitting a signal input from another sound device to a transmission path,
Consisting of a relay distribution device having a function of distributing signals received from a multiplexer via a transmission line to a plurality of transmission lines, and a function of synthesizing signals received from the plurality of transmission lines and sending the signals to one transmission line. did.

According to a second aspect of the present invention, in the open voice system of the first aspect, a transmission system for transmitting a plurality of signals by multiplexing and dividing into a plurality of channels is used.

According to a third aspect of the present invention, in the open voice system of the first aspect, the transmission path is a digital transmission path.

According to a fourth aspect of the present invention, there is provided an open voice system according to the first aspect of the present invention, comprising: a main unit for connecting a plurality of lines; and an analog circuit for converting an analog signal received from the line into a digital signal. A signal from a line including an analog-to-digital conversion circuit, a multiplexing circuit for multiplexing a plurality of converted digital signals, and a drive circuit for sending the multiplexed signal to a relay distribution device or a terminal device. A functional unit for encoding and multiplexing, a receiving circuit for receiving a multiplexed signal from a transmission line, a frame reproducing circuit for reproducing a frame from the received multiplexed signal, and a demultiplexer for separating the multiplexed signal and distributing it to a line Circuit and a digital-to-analog conversion circuit that converts the separated signal from a digital signal to an analog signal. It was constructed and a function of sending to the line the issue.

According to a fifth aspect of the present invention, the terminal device constituting the open voice system according to the first aspect arbitrarily selects a desired signal from multiplexed signals and outputs the signal to an audio device such as a speaker or a receiver. And a function of transmitting a signal input from an audio device such as a microphone or a transmitter to an arbitrary channel and outputting the signal to a transmission path.

According to a sixth aspect of the present invention, there is provided a transmission line interface circuit for connecting a terminal device constituting the open voice system to a main unit or a relay distribution device, and a multiplexed signal received from the transmission line. A receiving signal selection circuit for extracting an arbitrary signal from a digital signal and a digital signal for converting a selected digital signal into an analog signal.
An analog conversion circuit, a speaker or a receiver for outputting an analog signal as an audible sound, a transmitter as a voice input device, and an analog / digital converter for converting an analog signal output from the transmitter to a digital signal A conversion circuit, a transmission signal selection circuit for outputting the converted digital signal to the transmission line at a specific timing for multiplexing, and a control circuit for controlling the operation of the terminal device from the terminal device of the communication system. It was configured.

According to a seventh aspect of the present invention, there is provided a main port for connecting the relay distribution device constituting the open voice system according to the first aspect to a main unit or another relay distribution device, a plurality of terminal devices or a plurality of terminal devices. A plurality of sub-ports for connecting to the relay distribution device, and a distribution circuit for distributing the multiplexed signal received at the main port to the plurality of sub-ports,
A combining circuit for combining the multiplexed signals received at the plurality of sub-ports and sending the multiplexed signals to the main port.

According to an eighth aspect of the present invention, in the multiple simultaneous transmission system in the open voice system according to the first aspect, a plurality of terminals are synthesized by synthesizing signals received from a plurality of transmission paths and transmitting the combined signal to one transmission path. Signals can be sent from the device to one line at the same time.

According to the present invention, it is possible to construct a large-scale system by eliminating the limitation on the number of open voice lines due to the line capacity of the communication system by using the communication system and the open voice system as separate systems. By controlling the terminal device of the open voice system by the terminal device of the call system, the usability is improved, the transmission line is multiplexed as digital, and a relay distribution device is used instead of directly connecting the main device and the terminal device. By connecting the cables, the number of cables can be reduced and the cost can be reduced.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIG. 1, an overall relay system of a dealing communication system to which the present invention is applied will be described.
FIG. 1 is a relay system diagram of an entire system showing an example of a dealing communication system to which the present invention is applied. This system includes a call system 1 for making a general call,
It is mainly composed of an open voice system 5 for making a call with a specific destination using a microphone and a speaker.

The communication system 1 includes a line control device 10 as a main device and a plurality of communication consoles 20 as terminal devices. The call stand 20 is connected to a predetermined party by dial-up.

The line control device 10 includes a time division switch and a control system 11 for performing a switching operation and its control,
The time division switch and control system 11 and a plurality of call terminals 20
And a plurality of trunk circuits 13 connecting the time-division switch / control system 11 and a plurality of lines 30. The line 30 is connected to a predetermined party by calling or receiving a call.

The open voice system 5 comprises an open voice system main unit 50, a relay distribution unit 60, and a terminal device 70, and includes the main unit 50 and the relay distribution unit 60, between the relay distribution units 60, the intermediate unit 60. And the terminal device 70 are connected by a digital transmission line 80. A plurality of lines 35 are connected to the open voice system
Is connected to the relay distribution device 60 via the. Line 35
Is always connected to a specific partner, and a dedicated line or the like is used.

A plurality of relay distribution devices 60 can be provided, and each of the relay devices is cascaded. Transmission line 80
The relay distribution device 60a connected to the open voice system main unit 50 via the transmission line 80 is connected to another relay distribution device 60b as well as a plurality of other relay distribution devices or terminal devices 70 via a transmission line 80. A plurality of terminal devices 70 are connected via a transmission line 80 to the relay distribution device 60b that is connected to the relay distribution device 60a. If it is repeated that another relay distribution device is connected instead of the terminal device 70 connected to the relay distribution device 60b and another relay distribution device is connected, the system can be expanded in a tree shape. Can be.

The terminal device 70 is connected to the relay distribution device 60b via the transmission line 80 and is connected to the communication terminal 20 of the communication system 1, so that the terminal device 70 can be controlled from the communication terminal 20. I have. The terminal device 70 includes a control device 71 that controls the operation of the terminal device, a speaker 72 for listening to voice from the line, and a microphone 73 for sending the voice of the operator to the line. By connecting a plurality of devices, it is possible to simultaneously listen to voices from a plurality of lines. Further, the microphone 73 is provided with a plurality of switches described later,
By operating this switch, a specific line can be selected from a plurality of lines and sound can be transmitted, or sound can be transmitted to a plurality of lines simultaneously.

The transmission line 80 extends between the terminal device 70 and the relay distribution device 60, between the relay distribution devices 60,
And a main unit 50 as a digital transmission path for multiplexing and transmitting signals.

The configuration of the main unit 50 of the open voice system 1 will be described with reference to FIG. FIG. 2 is a block diagram showing an example of the main device 50 in the open voice system according to the present invention.

The open voice system main unit 50 includes:
A receiving circuit 51, a frame reproducing unit 52, a separating circuit 53, a plurality of transmission speed converting units 54, a plurality of D / A
Conversion section 55, a plurality of line interfaces 56, a plurality of A / D conversion sections 57, and a plurality of reception speed conversion sections 58
, A multiplexing circuit 59, a frame adding unit 5A, and a drive circuit 5B. The open voice system main unit 50 is connected to the transmission line 80 and the line 35.

The receiving circuit 51 is connected to the digital transmission line 8.
0 and has a function of receiving a multiplexed signal sent from the terminal device 70 side (downstream side), and its output is connected to a frame reproduction circuit 52 and a separation circuit 53.

The frame reproducing section 52 has a function of reproducing a synchronizing signal from the multiplexed signal received from the digital transmission path 80, and outputs the synchronizing signal to the separating circuit 53.

The demultiplexing circuit 53 has a function of demultiplexing the multiplexed signal using the synchronization signal and separating the multiplexed signal for each destination line.
Output to 4.

The transmission speed converter 54 has a function of converting the signal from the demultiplexer 53 into a signal having a lower transfer rate than the transmission speed of the line. It is output to the unit 55.

The D / A converter 55 has a function of converting the separated digital signal sent from the speed converter 54 into an analog signal, and outputs the analog signal to the interface 56.

The line interface 56 has a function of sending an analog signal to the line 35 and receiving an analog signal from the line 35.

The A / D converter 57 has a function of converting an analog signal received by the line interface 56 into a digital signal.
Output to the D conversion unit 57.

The receiving speed converter 58 has a function of converting the digital signal from each A / D converter 57 into a signal having a higher transfer rate, and multiplexes the speed-converted received signal into a multiplexing circuit 59. Output to

The multiplexing circuit 59 has a function of assembling each signal whose speed has been converted into a multiplexed signal, and outputs the multiplexed received signal to the frame adding circuit 5A.

The frame adding section 5A has a function of adding a frame bit string for synchronizing the multiplexed signal, and outputs a multiplexed signal with the frame bit string added to the drive circuit 5B.

The drive circuit 5B has a function of transmitting a multiplexed signal to which a frame bit string has been added to the digital transmission line 80.

The configuration of the relay distribution device 60 will be described with reference to FIG. FIG. 3 is a block diagram showing an example of the relay distribution device 60 in the open voice system according to the present invention.

The relay distribution device 60 includes a downstream receiving circuit 61, a phase adjusting circuit 62, a synthesizing circuit 63, an upstream drive circuit 64, and an upstream receiving circuit 65.
, A distribution circuit 66, and a downstream drive circuit 67, a function of distributing a multiplexed signal on one transmission path to a plurality of transmission paths, and a function of combining signals on a plurality of transmission paths to form one transmission It has a combining / distributing function for sending to the road. By connecting the relay distribution device having the combining / distribution function in a tree form from the main unit 50 of the open voice system, a large number of terminal devices 70 can be connected to the terminal without increasing the number of cables from the main unit. It has become possible.

A plurality of downstream receiving circuits 61 are provided and have a function of receiving a multiplexed signal from the downstream digital transmission line 80. The receiving circuit 61 outputs the received multiplexed signal to the phase adjusting circuit 62. I do.

Each of the receiving circuits 61
Has a function to synchronize the signals received by
The plurality of multiplexed signals are output to the synthesizing circuit 63 in synchronization.

The synthesizing circuit 63 has a function of synthesizing the signals synchronized by the phase adjusting circuit 62, and outputs the synthesized multiplexed signal to the drive circuit 64 on the upstream side.

The upstream drive circuit 64 has a function of transmitting the synthesized signal to the digital transmission path 80 on the upstream side.

The upstream receiving circuit 65 has a function of receiving a multiplexed signal from the upstream digital transmission line 80, and outputs the received multiplexed signal to the distribution circuit 66.

The distribution circuit 66 has a function of distributing the received multiplexed signal to each transmission line, and distributes the multiplexed signal to a plurality of downstream drive circuits 67 and outputs the same.

The downstream drive circuit 67 has a function of transmitting the distributed multiplexed signal to the downstream digital transmission line 80.

The configuration of the terminal device 70 will be described with reference to FIG. FIG. 4 is a block diagram showing an example of the terminal device 70 in the open voice system to which the present invention belongs.

The terminal device 70 includes a control device 71, a plurality of speakers 72, and a microphone 73.

The control device 71 includes a receiving circuit 711,
A frame reproducing unit 712 and a plurality of receiving speed converting units 71
3, a plurality of D / A conversion units 714, a plurality of reception amplification circuits 715, a transmission amplification circuit 716, and an A / D conversion unit 71
7, a transmission speed conversion unit 718, and a frame addition unit 71
9, the drive circuit 71A, and the CPU interface 7
1B, a reception signal selection unit 71C, and a transmission signal selection unit 71
D, a key control circuit 71E, and a key group 71F.

The receiving circuit 711 has a function of receiving a multiplexed signal from the digital transmission line 80 on the upstream side, and converts the received multiplexed signal into a frame reproduction circuit 712.
Is output to the plurality of reception speed conversion circuits 713.

The frame reproducing section 712 has a function of extracting a synchronization signal from the received multiplexed signal, and outputs the synchronization signal to a plurality of reception speed conversion sections 713.

The reception speed conversion section 713 selects a necessary signal from the multiplexed signal using the reception selection signal from the reception signal selection circuit 71 C, and further increases the transfer rate using the synchronization signal from the frame reproduction circuit 712. It has a function of converting the selected signal having a low transfer rate into a signal having a low transfer rate.
/ A converter 714.

The D / A converter 714 has a function of converting a digital signal into an analog signal, and outputs the analog-converted signal to the receiving amplifier circuit 715.

The receiving amplifier circuit 715 has a function of amplifying the converted analog signal and driving the speaker 72.

The transmission amplifier circuit 716 includes a microphone 73
It has a function of amplifying the audio signal input from the A / D converter to a predetermined level, and outputs the amplified analog signal to the A / D conversion circuit 717.

The A / D converter 717 has a function of converting the amplified analog signal into a digital signal.
The digital signal is output to the transmission speed conversion circuit 718.

The transmission speed conversion section 718 has a function of converting the converted digital signal into a signal having a higher transfer rate, and outputs the signal converted to a higher transfer rate to the frame addition circuit 719. Further, the transmission speed conversion unit 718 has a function of designating a transmission destination by a transmission destination selection signal from the transmission signal selection unit 41D.

The frame adding section 719 has a function of adding a frame bit string for synchronization to the speed-converted digital signal, and outputs a signal with the frame bit string added to the drive circuit 71A.

The drive circuit 71 A has a function of transmitting a signal to which a frame bit string is added to the digital transmission line 80.

The CPU interface 71 B has a function of controlling the operation of the terminal device 70 and a function of providing an interface for connecting to the communication desk 20.

The reception signal selection section 71C is connected to the CPU interface 71B and has a function of selecting a signal to be output to the speaker 72 based on a signal from the communication console 20, and converts the reception selection signal to each reception speed conversion circuit. 713.

The transmission signal selection section 71 D
It has a function of selecting a line from which microphone sound is output based on a signal from 1E or a signal from the call desk 20, and outputs a transmission selection signal to the transmission speed conversion circuit.

The key control circuit 71E has a function of monitoring the state of the key group 71F and detecting the depression of the key, and outputs a signal of the depressed key 71F to the CPU interface 71B.

The key group 71F is a key group for the operator to select a partner to output the sound of the microphone.
0 is provided. The key group 71F is the communication system 1
Can be provided in the call stand 20 of the communication device.

Referring to FIG. 5, one embodiment of the structure of the multiplexed signal passing through the digital transmission line 80 in the open voice system according to the present invention will be described.

In this example, the multiplexed signal MS passing through the digital transmission line 80 is composed of a frame F composed of a plurality of bit strings. Each frame F has a synchronization bit Sb, which is a bit sequence for synchronizing signals on the receiving side, a frame bit Fb, which is a bit sequence for reproducing a synchronization signal, and time-division transmission of audio data of each line. Slots St1 to Stn and an invalid slot S
ti.

As described above, since one frame has N slots, the multiplexed signal can simultaneously transmit audio data of N lines. The frame synchronizing signal FS is reproduced from the frame bit Fb in the frame reproducing units 52 and 712 of each device.

Next, an example of the operation of the open voice system of the present invention will be described with reference to FIGS.

First, in the system shown in FIG. 1, a case where a signal received from the line 35 to which the communication system 1 is connected is output to the speaker 72 will be described. In the open voice system main unit 50 shown in FIG. 2, after the audio signal received from the line 35 is subjected to the balance-unbalance conversion, the level adjustment, etc. in the line interface 56, the A
In the / D conversion section 57, it is converted into a digital signal.

The audio data converted to a digital signal is converted from a lower transfer rate, for example, 2.048 Mbps, to a higher transfer rate, for example, 10 Mbps, by the receiving speed converter 58.
9 is multiplexed together with audio data received from another line. Further, a synchronization bit Sb and a frame bit Fb are added to the multiplexed signal from the beginning by a frame addition unit 5A, thereby forming a multiplexed signal shown in FIG.

This signal is sent out to the digital transmission line 80 by the drive circuit 5B and received by the relay distributor 60a.

In the relay distribution device 60 shown in FIG.
The multiplexed signal received from the main unit side (upstream side) digital transmission path 80 passes through an upstream receive circuit 65, is distributed to a plurality of signals by a distribution circuit 66, and is distributed to a plurality of downstream sides by a downstream drive circuit 67. The data is transmitted to the digital transmission path 80. In the example of the system shown in FIG. 1, one of them is connected to the relay distributor 60b, and the operation of the relay distributor 60b is the same as that of the relay distributor 60a. Be distributed.

In the system shown in FIG. 1, a relay distribution device 60b and a terminal device 70 are connected via a digital transmission line 80.

In the terminal device 70 shown in FIG. 4, a signal received from the digital transmission line 80 on the side of the relay distribution device 60b (upstream side) passes through a receive circuit 711, and a speed conversion unit 713 for reception and a frame The data is sent to the reproducing unit 712. The frame reproducing unit 712 reproduces a synchronization signal from the received signal, and sends the synchronization signal to the reception speed conversion unit 713.

[0077] On the other hand, the call table 20, and advance whether the data of which slot to output to which the speaker data is set, the reception signal selecting section 71C in accordance with the data
Sends a reception selection signal indicating which slot data to select to each reception speed conversion unit 713.

The receiving speed converter 713 receives these signals and converts the audio data of each slot from a higher transfer rate, for example, 10 Mbps, to a lower transfer rate, for example, 2.048 Mbps. This is D
The / A converter 714 converts the signal into an analog signal, and the speaker amplifier 715 drives the speaker.

On the other hand, the sound of the microphone 73 is
The operation in the case of sending the data to is described. In the terminal device 70 shown in FIG. 4, an audio signal input from the microphone 73 is amplified to a predetermined level by a transmission amplifier circuit 716, then converted into a digital signal by an A / D converter 717, and transmitted to a digital signal for transmission. The data is sent to the speed converter 718.

The communication terminal 20 has a key group 71F in advance.
When a key is operated, data indicating in which slot audio data is to be loaded is set. By operating this data and the key group 71F, the transmission signal selection unit 7 is operated.
The ID transmits a transmission selection signal indicating which slot carries audio data to the transmission speed conversion unit 718.

The transmission speed converter 718 receives these signals and converts the audio data of each slot from a lower transfer rate, for example, 2.048 Mbps, to a higher transfer rate, for example, 10 Mbps.

The converted signal is supplied to a frame adding section 719.
In FIG. 5, a synchronization bit and a frame bit are added.
The multiplexed signal shown in FIG. This signal is sent from the drive circuit 71A to the relay distribution device 60b via the digital transmission line 80.

The multiplexed signal received by the relay distribution device 60b of FIG. 3 is sent to the phase adjustment circuit 62 via the downstream receive circuit 61. The phase adjustment circuit 62 adjusts the phases of the signals received from the plurality of transmission paths to achieve synchronization.

The signals synchronized by the phase adjustment circuit 62 are combined for each slot by the combining circuit 63 and converged into one signal. As a result, it is possible to simultaneously put audio from a plurality of terminal devices 70 in the same slot. This means that voice can be simultaneously transmitted from the plurality of terminal devices 70 to the same line 35.

The signal synthesized by the synthesizing circuit 63 is transmitted to the transmission line 80 by the drive circuit 64 on the upstream side.
After that, this signal is combined with voice data from another terminal device or the relay distribution device by the relay distribution device 60a, and transmitted to the open voice system main unit 50.

Open voice system main unit 5 of FIG.
0, the signal received from the digital transmission path 80 is
The data is sent to the separation circuit 53 and the frame reproducing unit 52 via the receiving circuit 51. The frame reproducing unit 52 reproduces a synchronization signal from the received signal, and sends the synchronization signal to the separation circuit 53.

The separating circuit 53 receives these signals and separates the multiplexed audio data signal for each slot.
The data is transmitted to the transmission speed converter 54.

The transmission speed converter 54 converts the audio data from a higher transfer rate, for example, 10 Mbps to a lower transfer rate, for example, 2.048 Mbps. This is converted by a D / A converter 55 into an analog signal,
Level adjustment and unbalance in line interface unit 207-
After the balance conversion is performed, the data is transmitted to the line 35.

[0089]

According to the present invention, a large-scale system can be constructed by eliminating the limitation on the number of open voice lines due to the line capacity of the telephone system by using the telephone system and the open voice system as separate systems. Possible,
Controlling the terminal device of the open voice system by the terminal device of the call system improves usability, furthermore, multiplexes the transmission path as digital and uses a relay distribution device instead of directly connecting the main unit and the terminal device. By connecting, the number of cables can be reduced and the cost can be reduced.

[Brief description of the drawings]

FIG. 1 is a relay system diagram showing a configuration of an open voice system according to the present invention.

FIG. 2 is a system block diagram showing a configuration of a main unit constituting the open voice system according to the present invention.

FIG. 3 is a system block diagram showing a configuration of a relay distribution device that configures the open voice system according to the present invention.

FIG. 4 is a system block diagram showing a configuration of a terminal device constituting the open voice system according to the present invention.

FIG. 5 is a diagram illustrating a signal configuration example of a multiplexed signal.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 communication system 10 line control device 11 time division switch and control system 12 line circuit 13 trunk circuit 20 call stand 30 line 35 line 5 open voice system 50 main unit 51 receiving circuit 52 frame reproduction unit 53 separation circuit 54 transmission speed conversion unit 55 D → A conversion unit 56 Line interface 57 A → D conversion unit 58 Reception speed conversion unit 59 Multiplexing circuit 5A Frame addition unit 5B Drive circuit 60 Relay distribution unit 61 Receive circuit 62 Phase adjustment circuit 63 Combination circuit 64 Drive circuit 65 Receive circuit 66 Distribution circuit 67 Drive circuit 70 Terminal device 71 Control device 711 Receive circuit 712 Frame reproduction unit 713 Receiving speed conversion unit 714 D → A conversion unit 715 Receiving amplification circuit 716 Transmission amplification circuit 717 A → D conversion unit 718 Transmission speed conversion unit 719 Frame addition unit 71A Drive circuit 71B CPU interface 71C Reception signal selection unit 71D Transmission signal selection unit 71E Key control circuit 71F Key group 72 Speaker 73 Microphone 80 Transmission path F frame Sb Synchronization bit Fb Frame bit St Slot Sti invalid slot SF frame synchronization signal

Claims (8)

[Claims] An open voice system of a dealing communication system for conducting financial transactions such as exchanges and securities, a function of connecting a plurality of lines, encoding and multiplexing signals from those lines, and encoding / multiplexing. Main unit having the function of separating and decoding the multiplexed signal and transmitting the multiplexed signal to the line, a transmission line for transmitting the multiplexed signal, and an audio device for selecting a desired signal from the multiplexed signal on the transmission line. And a function to send signals input from another audio device to a transmission line, and a function to distribute signals received from a multiplexer via a transmission line to a plurality of transmission lines. And a relay distribution device having a function of synthesizing signals received from a plurality of transmission paths and transmitting the combined signal to one transmission path. 2. The open voice system according to claim 1, wherein a plurality of signals are transmitted by multiplexing and dividing into a plurality of channels. 3. The open voice system according to claim 1, wherein the transmission path is a digital transmission path. 4. A main unit constituting the open voice system according to claim 1, wherein said interface circuit connects a plurality of lines, and an analog circuit converts an analog signal received from the line into a digital signal. .Signaling a signal from a line including a digital conversion circuit, a multiplexing circuit for multiplexing a plurality of converted digital signals, and a drive circuit for sending the multiplexed signal to a relay distribution device or a terminal device Functional unit for multiplexing and multiplexing, a receiving circuit for receiving a multiplexed signal from a transmission line, a frame reproducing circuit for reproducing a frame from the received multiplexed signal, and a separating circuit for separating the multiplexed signal and distributing it to a line And a digital-to-analog conversion circuit that converts the separated signal from a digital signal to an analog signal. A main body device having a function of sending out to a line. 5. A terminal device constituting the open voice system according to claim 1, wherein a function of arbitrarily selecting a desired signal from the multiplexed signals and outputting the selected signal to an audio device such as a speaker or a receiver. A terminal device having a function of transmitting a signal input from an audio device such as a microphone or a transmitter to an arbitrary channel and outputting the signal to a transmission path. 6. A terminal device constituting an open voice system according to claim 1, wherein a transmission line interface circuit for connecting to a main unit or a relay distribution device, and an arbitrary multiplexed signal received from the transmission line. A reception signal selection circuit for extracting a signal, a digital / analog conversion circuit for converting the selected digital signal into an analog signal, a speaker or a receiver for outputting the analog signal as audible sound, and a voice input device. A transmitter and an analog / digital converter for converting an analog signal output from the transmitter into a digital signal.
A digital conversion circuit, a transmission signal selection circuit for outputting the converted digital signal to the transmission line at a specific timing for multiplexing, and a control circuit for controlling the operation of the terminal device from the terminal device of the communication system. A terminal device comprising: 7. A relay distribution device constituting the open voice system according to claim 1, wherein a main port for connecting to a main unit or another relay distribution device, a plurality of terminal devices or a plurality of relay distribution devices. A plurality of sub-ports for connecting to the device, a distribution circuit for distributing the multiplexed signal received at the main port to the plurality of sub-ports, and combining the multiplexed signals received at the plurality of sub-ports,
And a combining circuit for sending the signal to a main port. 8. The multiple simultaneous transmission system in the open voice system according to claim 1, wherein a signal received from a plurality of transmission paths is combined and transmitted to one transmission path, so that a plurality of terminal devices form one line. A plurality of simultaneous transmission systems characterized in that signals can be simultaneously transmitted to a plurality of transmission systems.