VISSONIC 4K60 HDMI 8×9 Seamless Matrix and Video Wall Processor User Manual

VISSONIC 4K60 HDMI 8×9 Seamless Matrix and Video Wall Processor

Product Information

• Specifications:
  • Model: VIS-UHD0809-Vw
  • Resolution: 4K Ultra HD
  • Matrix Size: 8 inputs, 9 outputs
  • Seamless Switching: Yes
• General Information Instructions:
  • The general information instructions provide factors that may lead to unsuccessful operation or setup and relevant information to pay attention to.
• Safety Instructions:
  • For your safe and correct use of the equipment, please observe the following safety instructions:
  • Important Note: To ensure reliable performance and user safety, please follow the installation, use, and maintenance guidelines.
  • Matters Needing Attention of Installation:
  • Do not use this product in places with dust, soot, or electric hazards.
  • Install and perform wiring operations only after cutting off all external power sources to avoid electric shock or equipment damage.
  • This product requires grounding. Ensure proper grounding to avoid electric shocks.
  • Remove all other objects after wiring installation and cover the terminals of the product before electrification to prevent electric shock.
• Matters Needing Attention During Operation and Maintenance:
  • Avoid touching terminals in a current state to prevent electric shock or incorrect operation.
  • Perform cleaning and terminal tightening work after turning off the power supply to avoid electric shock.
  • When connecting or dismantling communication signal cables, expansion module cables, or control unit cables, ensure the power supply is turned off to prevent equipment damage or incorrect operation.
  • Avoid dismantling the equipment to prevent damage to internal electrical components.
  • Read the manual and confirm safety measures before making any program changes, commissioning, or starting/stopping operations.
• Matters Needing Attention in Discarding Product:
  • Electrolytic explosion: The burning of electrolytic capacitors on circuit boards may lead to an explosion.
  • Dispose of the product according to proper classification and do not put it into regular garbage.
  • Dispose of it as industrial waste or follow local environmental protection regulations.
• Preface:
  • This manual provides information on the use, performance parameters, and troubleshooting of the VISSONIC VIS-UHD0809-Vw 8×9 seamless 4K Ultra HD matrix and video wall processor.
  • If there are any changes to the technical parameters and system usage mentioned in this manual, the manufacturer will release an updated version.
  • Please refer to the latest user manual for accurate information.

FAQS

• Can I use this product in dusty environments?
  • No, it is advised not to use this product in places with dust, soot, or electric hazards.
• Do I need to ground this product?
  • Yes, this product requires proper grounding to avoid electric shocks.
• What should I do before making any program changes?
  • Before making any program changes, commissioning, or starting/stopping operations, it is essential to read the manual, fully confirm the safety measures, and follow the instructions provided.

symbols

The meaning of symbols

• Safety instructions
  • For your safe and correct use of equipment, we use a lot of symbols on the equipment and in the manuals, demonstrating the risk of body hurt or possible damage to property for the user or others.
  • Indications and their meanings are as follows.
  • Please make sure to correctly understand these instructions before reading the manual.

General information instructions

Important note

Warning

• To ensure the reliable performance of the equipment and the safety of the user, please observe the following matters during the process of installation, use, and maintenance:

The matters needing attention of installation

• Please do not use this product in the following places: the place of dust, soot, electric conductivity dust, corrosive gas, and combustible gas; the place exposed to high temperature, condensation, wind, and rain; the occasion of vibration and impact.
• Electric shock, fire, and wrong operation can lead to damage and deterioration of the product, either;
• In processing the screw holes and wiring, make sure that metal scraps and wire heads will not fall into the shaft of the controller, as it could cause a fire, fault, or incorrect operation;
• When the installation work is over, it should be assured there is nothing on the ventilated face, including packaging items like dust paper. Otherwise, this may cause a fire, fault, or incorrect operation for the cooling is not free;
• Should avoid wiring and inserting cable plug-in charged state, otherwise, it is easy to cause shock or electrical damage;
• The installation and wiring should be strong and reliable, contact undesirable may lead to false action;
• For serious interference in applications, choose a shield cable as the high-frequency signal input or output cable, to improve the anti-jamming ability of the system.

Attention to the wiring

• Only after cutting down all external power sources, does an installation, or wiring operation begin, or it may cause electric shock or equipment damage;
• This product is grounded by the grounding wires.
• To avoid electric shocks, grounding wires, and the earth must be linked together. Before the connection of the input or output terminal, please make sure this product is correctly grounded;
• Immediately remove all other things after the wiring installation. Please cover the terminals of the products before electrification to avoid causing electric shock.

Matters needing attention during operation and maintenance

• Please do not touch terminals in their current state, or it may cause a shock or incorrect operation;
• Please do cleaning and terminal tighten work after turning off the power supply. These operations can lead to electric shock in a current state;
• Please do the connection or dismantle work of the communication signal cable, the expansion module cable, or the control unit cable after turning off the power supply, or it may cause damage to the equipment and incorrect operation;
• Please do not dismantle the equipment, avoid damaging the internal electrical component;
• Should be sure to read the manual, and fully confirm the safety, only after that can do program changes, commissioning, and start and stop operation.

Matters needing attention in discarding product

• Electrolytic explosion: the burning of the electrolytic capacitors on circuit boards may lead to explosion;
• Please collect and process according to the classification, do not put into life garbage;
• Please process it as industrial waste, or according to the local environmental protection regulations.

Preface

• This manual mainly describes the use, performance parameters and troubleshooting of VISSONIC VIS-UHD0809-Vw 8×9 seamless 4K Ultra HD matrix and video wall processor.
• If the technical parameters and system usage in this manual are changed, the manufacturer will update the version of the manual. Please use the latest user manual.
• The copyright of the manual belongs to VISSONIC ELECTRONICS LIMITED.
• This manual is protected by the Copyright Law of the People’s Republic of China and other intellectual property laws and regulations.
• Without permission, it is not allowed to copy part or all of the manual or modify this manual.

Overview

• VIS-UHD0809-VW is a professional seamless UHD video matrix switching and splicing wall processor with HDMI 8 in 9 out.
• It provides ultra-high data transfer rates and perfectly supports synchronous seamless switching of HDMI signals, resolutions up to 4K@60, 4:4:4, creative video wall layouts through an intuitive Web GUI, and FPGA-based pure hardware architecture can be extensive.
• Used for stage performances, digital classrooms, video conference rooms, etc.

Features

1. 8×9 HDMI Matrix – From input to output, the entire signal path has a complete 18G signal processing. Capable of processing HDR signals with a resolution of up to 4K60 4:4:4 and a total bandwidth of 18Gbps.
2. Video wall – Create creative video wall layouts with an intuitive Web GUI that makes it easy to configure multiple monitors to display video as one large screen.
3. 4K Zoom – 4K Zoom technology converts various input resolutions to the monitor’s native resolution, providing viewers with the best picture and video quality.
4. Seamless switching – FPGA-based pure hardware architecture delivers peak data rates up to 4K@60 and perfectly supports simultaneous switching of HDMI signals.
5. Input volume control – One provides volume control for the audio input, so when we change the volume, each output of that input changes.
6. Support DDC transmission
7. HDMI-DVI interface format correction – Automatically reformats the HDMI source signal for output to a connected DVI display.
8. Automatic input cable equalization – When using long cables, low-quality cables, or source devices with poor HDMI signal output, actively adjust the input HDMI signal to compensate for signal loss. When used with the HDMI 2.0 cable, the 4K/60 signal can be equalized to 35 feet (10.7 m).
9. Automatic output relocks – a remodel and restore the timing of the HDMI signal at each output, enabling transmission over a long HDMI cable.
10. Support +5 VDC, 250 mA power supply for HDMI output of external peripherals.
11. Output Mute control – Provides the ability to mute one or all outputs at any time. For example, this allows in display of content on the local monitor before moving on to the main presentation monitor.
12. Ethernet Monitoring – can be actively monitored, managed, or controlled over a LAN, WAN, or Internet using standard TCP/IP protocols.
13. Input marker – a marker is added to each input signal to distinguish between different inputs.
14. Captions – You can add scrolling captions or welcome signs to the wall.
15. Input test images – An input can automatically generate test images for engineering debugging and test purposes.
16. Output test image – Output test image to test whether the output port and display device are properly connected.
17. Splice synchronization – Supports frame synchronization to ensure perfect synchronization of various output units.
18. Audio Code – Analog audio can be embedded in or removed from an HDMI signal.

Installation

Hardware description

Product parameters:

RJ45             control

protocol

| TCP/IP
Ethernet rate| 10M/100M
Storage environment| Temperature：-20℃~+70℃，humidity：10%~90%
Work environment| Temperature：-20℃~+70℃，humidity：10%~90%
Power| AC 110~240V
Power consumption| 100W
Chassis specification| 1U
Dimensions (length x
depth x height).| 43035043.5mm
Weight| 3.5kg
MTBF| 30,000h
Warranty| One-year warranty and lifetime maintenance

Description of the front and rear panels

The front and rear panels of the VIS-UHD 0809-VW seamless UHD Matrix switcher include:

1. Power switch – Power on or off the matrix switcher.
2. Display – Current matrix status and command input and result display.
3. Signal indicator -POWER: power indicator; ACTIVE: indicates the status indicator for receiving commands. SENSOR: infrared receiving status indicator.
4. 0 to 9 Number of channels – Number of Input channels and number of output channels the/and button is used to select the isolation symbol of multiple channels at the same time. The ALL button is used to select all output channels.
5. Control Command buttons – Change IP, V switch command, SAVE save scene, RECALL call scene, and left and right menu selection buttons.
6. AUDIO IN – 8 3.5mm audio input; AUDIO OUT-9 3.5mm audio output; IR IN-8 infrared input interface; IR OUT-9 infrared output port.
7. HDMI IN – Signal input source, provides eight HDMI input ports for connecting to the corresponding input source device.
8. HDMI OUT – signal output source, providing 9 HDMI output ports for connecting the corresponding output device.
9. RS-232 – Provides one independent RS-232 port (DB9 base), which can be used to connect to a PC or central control device for centralized system control. ETHERNET RJ45 Network port – An Ethernet port used to connect the local area network (LAN) to the Internet. If the green indicator is on, the connection is normal. If the orange indicator is blinking, data is being received or sent.
10. Ground pole
11. Power input port – System power supply, support AC100~240V 50/60Hz input.

Network protocol

Protocol: TCP, IP: 192.168.1.188, port: 80

Protocol table:

CU”：” Ver1.2/Ver1.1/Ver 1.3”,“FPGA”：” Ver1.2/V

er1.1/Ver1.3/Ver1.2”   }

{param=status}| Switch the status.| Mode: Y 0: Single screen mode，1: One row and two columns 2: Two-row and one columns 3: Two-row and two columns 4: Two- row and three columns 5: Three-row and two columns 6: Three-row and three columns| {“video1”:X1,

“video2”:X2,

“video3”:X3, “video4”:X4,      …      …

“video9”:X9,”mode”:Y}

{“audio1”:X1,“audio2”: X2,             “audio3”:X3, “audio4”:X4,      …      …

“audio9”:X9}

{“IR1”:X1,      “IR2”:X2, “IR3”:X3,

“IR4”:X4,         …        …

“IR9”:X9}

{param=resolution}| Resolution information.| No| {“in1”:1920x1080x60Hz,

…                               …

“in8”:3840x2160x60Hz,“ out1”:1920x1080x60Hz,..

…

“out9”:3840x2160x60Hz

}//no input                   or

corresponding

{param=inputinfo}| Input signal status| No| {“input-1”:true/false, “input-2”:true/false, “input-3”:true/false, “input-4”:         true/false, “input-5”: true/false, … …

“input-8”: true/false }

{param=netInfo}| Settings->Query| No| {“ip”:” X”,” gateway”:” Y”
| network parameters| | ,” subnet”:” A”,” mac”:” B”

}

---|---|---|---
{param=&ip,ip=%d.%d

.%d.%d,gateway=%d.% d.%d.%d,subnet=%d.% d.%d.%d,mac=%x:%x:

%x:%x:%x:%x},

|

Settings->Set    network parameters

|

No

|

No

{param=XVIDEOY}| Video source switching| X： input，Y： output| No
{param=XAUDIOY}| Audio switching| X： input audio （1-8）| No
{param=XIRY}| Infrared switch| X： input infrared （1-8）| No

{param=modeX}

|

Splicing settings

| X： Splicing rows and columns （0–6）|

No

{param=Default}| Reset| No| No
{param=In_Pattern[x]/[ y]}| Input      test      pattern settings| X： Channel y： Test graphics mode（0–11）|

No

{param=Out_Pattern[x]

/[y]}

| Output     test     pattern settings| X： Channel y： Test graphics mode（0–11）|

No

{param=BellOn}| Buzzer setting| Bellon/BellOff| No

{param=Save[x]}

|

Save plan

| X： Plan serial number

（0–9）

|

No

{param=Recall[x]}

|

Plan call

| X： Plan serial number

（0–9）

|

No

{param=Clear[x]}

|

Plan cleared

| X： Plan serial number

（0–9）

|

No

{param=Get_Volume}

|

Get input volume

|

x: Volume 0–100

| {“Volume1”:X1,

“Volume2”:X2, “Volume3”:X3,,    …    …

“Volume8”:X8}

{param=Volume[x]/[y]

| Input volume adjustment|

x:    Input    channel    y:

| No
}| | Volume 0–100|
---|---|---|---
{param=MuteOn[x]}| Output mute on| x: Output channel| No
{param=MuteOff[x]}| Output mute off| x: Output channel| No

{param：Port[x]/[y]}

|

Set output resolution

| x: Output channel y:1920x1080x60Hz!/38 40x2160x60Hz!

Resolution               list reference UHD_HDMI

|

No

{param                    ：

Analog_sel[x]/[y]}

| Set       output       audio selection| x: Output channel y: 0: number 1：Simulation|

No

{param：All[x]}

| Switches the specified input to all outputs|

x: Input channel

|

No

PC software introduction

Connection

1. The router is connected to the CAT5 network cable for TCP/IP communication. The default IP address of the matrix is 192.168.1.188. The IP addresses assigned by routers must be on the same network segment.
2. To use the PC side control, open the “Network and Internet” Settings,” Change Adapter Options “set the following IP.

Login

• Double-click to open the software “UHDMATRIX CONTROL”

• Check whether the device IP address and port number are correct, and then enter the password of the default account.

• IP address: 192.168.1.188, port number: 804. The login and password are ADMIN and admin123

Matrix switching page

1. Video: Click here to switch to the Matrix switch page.
2. Signal input list: green when there is signal input, black when there is no signal input.
3. Matrix output ports Area: Matrix 1-9 output ports.

Signal list right-click function as shown below:

1. Rename: Can change the input signal name.
2. Graphic testing: Input can automatically generate test images for engineering debugging and testing.
3. Marker setting: A marker can be added to each input signal to distinguish between different inputs.
4. EDID: Click on “EDID” and open an “EDID” control window.
   • Select an input in the signal list and click “EDID”
   • “Read Output to Input” Select the output you want to read and click “Apply”
   • “Update EDID” Click “Browse”, select the EDID file to be updated to open, and click “Upload”.
5. Volume adjustment: Provides volume control for the audio input, so when we change the volume, it is changed on the corresponding output.
6. Resolution: View the input resolution.

The right-click function of the output port is shown as follows:

1. Rename: You can change the output port name.
2. Resolution: Output resolution to view or change.
   • Support resolution:
   1. 800x600x60Hz
   2. 1024x768x60Hz
   3. 1280x720x50Hz
   4. 1280x720x60Hz
   5. 1280x768x60Hz
   6. 1280x800x60Hz
   7. 1280x960x60Hz
   8. 1280x1024x60Hz
   9. 1360x768x60Hz
   10. 1366x768x60Hz
   11. 1440x900x60Hz
   12. 1600x900x60Hz
   13. 1600x1200x60Hz
   14. 1920x540x50Hz
   15. 1920x540x50Hz
   16. 1920x540x60Hz
   17. 1920x1080x30Hz
   18. 1920x1080x50Hz
   19. 1920x1080x60Hz
   20. 1920x1200x60Hz
   21. 3840x2160x30Hz
   22. 4096x2160x30Hz
   23. 3840x2160x60Hz
   24. 4096x2160x60Hz
3. Graphics test: Output test images to test whether the output port and display device are properly connected.
4. Clear: can quickly clear the input signal of the output port.

Fast splicing control

The splicing wall mode can be set, up to one splicing wall can be set, and there are 7 splicing modes.

1. Signal List: Input signals, right-click for signal functions (see 5.3 for details).
2. Splice Wall: Displays the current mode and signals for the splice wall; signals can be dragged to the splice.
3. Mode: Splicing mode, supports up to 7 splice wall modes. Supports single screen, left-right 1×1, up-down 1×1, 2×2, 2×3, 3×2, 3×3.

Splicing modes correspond to ports:

• Single screen has no splicing, each output port outputs independently.
• Left-right 1×1 with ports 1 and 2 are spliced, and other output ports can continue matrix switching.
  • Up-down 1×1: Ports 1 and 2 are spliced, and other output ports can continue matrix switching.
  • 2×2: Ports 1, 2, 3, and 4 are spliced, and other output ports can continue matrix switching.
  • 2×3: Ports 1, 2, 3, 4, 5, and 6 are spliced, and other output ports can continue matrix switching.
  • 3×2: Ports 1, 2, 3, 4, 5, and 6 are spliced, and other output ports can continue matrix switching.
  • 3×3: All matrix output ports 1, 2, 3, 4, 5, 6, 7, 8, and 9 are spliced.

Audio Switching Matrix

1. Audio Input List: Analog audio 3.5mm input, digital audio input.
2. Audio Output Ports: Analog audio 3.5mm output ports, digital audio output ports. Supports an audio matrix, allowing for flexible switching between analog and digital audio. Right-click functions in the audio input list include renaming and volume adjustment.
3. Right-click functions for audio output ports include renaming and clearing.

Infrared Switching Matrix

Allows for freely switching infrared channel control.

Setting

1. Network Settings: View connected device network IPs, change network settings, restore factory settings, etc.
2. Other Settings: Logout, subtitle settings for the splicing wall, language switch between Chinese and English, user management, software auto-login settings, and device buzzer toggle.

Subtitle Settings for the Splice Wall:

Subtitle Settings:

• Characters: Enter the content you want to display as subtitles.
• Font: Set the font style for subtitles.
• Font Size: Adjust the font size of subtitles.
• B (Bold): Make subtitles bold.
• I (Italic): Italicize the subtitle font.
• U (Underline): Underline the subtitle font.
• Upload Characters: Upload the configured characters to the current splice wall.
  • Note: Set the characters before uploading. For example, if bold is not set before uploading, clicking bold after uploading will have no effect. So, configure before uploading, or else you’ll need to upload new subtitles.

Image Settings:

• Image Path: Upload an image to the splice wall for display as subtitles. Note: Keep the image size reasonable to avoid display issues. Supports various image formats such as .bmp, png, jpg, jpeg, tga, tiff, and others.
• Display Settings:
• Display Switch: Set the switch for subtitles on the current splice wall.
• Speed: Control the speed of subtitle movement (0 means stationary, 10 is the highest speed).
• Direction: Set the direction of subtitle movement on the splice wall.
• Horizontal: Set the horizontal position of subtitles on the splice wall. Note: If the subtitle speed is not 0, the horizontal position will be ineffective.
• Vertical: Set the vertical position of subtitles on the splice wall.
• Colour: Choose a colour to change the font colour of subtitles on the current splice wall.
• Font Background Color: Choose a colour to change the background colour of subtitles on the current splice wall. There is a switch next to the colour selection to control the visibility of the background colour.
• User Management:
  For example, to add a user named “root” with the password “123456”: Click on “Add,” enter the username and password, re-enter the password, and click “Save.” You can use this username and password for the next login.

About

• Viewing the hardware and software versions of connected devices.

Web Control

Connection

1. Can be connected to the router via a CTA5 Ethernet cable for TCP/IP communication.
   • The matrix’s default IP address is 192.168.1.188. Please configure the connected router to be in the same network segment.
2. If controlling from the PC, please set the following IP.
3. Open the mobile or PC browser and enter the matrix IP: 192.168.1.188 to directly access the control interface.

Matrix Switching Control

1. Video: Click to quickly switch to the matrix control interface.
2. Input Signal List: Check for input signals here. A green status indicates signal input, while a default black signifies no signal input. Right-click functions in the signal list include graphic testing, logo settings, EDID, volume adjustment, and resolution settings.
3. Matrix Output Ports: Matrix output ports 1-9.

Fast splicing control

1. Splice: Click to quickly switch to the splice control interface.
2. Splice Wall: Displays the current mode and signals for the splice wall; signals can be dragged to splice.
3. Mode: Splicing mode, supports up to 7 splice wall modes. Supports single screen, left-right 1×1, up-down 1×1, 2×2, 2×3, 3×2, 3×3.

Splicing modes correspond to ports:

• Single screen: No splicing, each output port outputs independently.
• Left-right 1×1: Ports 1 and 2 are spliced, and other output ports can continue matrix switching.
• Up-down 1×1: Ports 1 and 2 are spliced, and other output ports can continue matrix switching.
• 2×2: Ports 1, 2, 3, and 4 are spliced, and other output ports can continue matrix switching.
• 2×3: Ports 1, 2, 3, 4, 5, and 6 are spliced, and other output ports can continue matrix switching.
• 3×2: Ports 1, 2, 3, 4, 5, and 6 are spliced, and other output ports can continue matrix switching.
• 3×3: All matrix output ports 1, 2, 3, 4, 5, 6, 7, 8, and 9 are spliced.

Audio switching matrix

1. Audio: Quick switch to audio control.
2. Audio Input List: Analog Audio 3.5mm Input, Digital Audio Input
3. Audio Output Ports: Analog Audio 3.5mm Output Port, Digital Audio Output Port. Display the audio signal of the current audio output port, and drag the signal to the switch.

Infrared switching matrix

1. Infrared: Quickly switch to infrared control.
2. Infrared Input Ports: Display the signal list for Infrared Input Ports 1-8.
3. Infrared Output Ports: Show and drag to switch signals for the current Infrared output port.

Setting

1. Setting: Quickly switch to the settings menu.
2. Matrix Network Settings: Displays the current network IP address of the connected matrix. Allows modification of the network IP address and factory reset.

Version

1. About: Quickly switch to the version viewing interface.
2. Hardware and Software Versions: Displays the current matrix’s hardware and software versions.

Front Panel Button Operations Guide

Matrix switching

Example 1: To switch the matrix from “Input 1” to “Output 2”, follow these button operations:

Example 2: To switch the matrix from “Input 1” to both “Output 2” and “Output 3,” followthese the button operations:

Example 3: To switch the matrix from “Input 1” to “All Outputs,” follow these button operations:

Save Switching and State Invocation

Save the current matrix switching state, with a maximum of 10 states, corresponding to keys 0-9.

To save the current matrix switching state, the key operation is:

Call the matrix switching state Invoke the saved matrix state, the key operation is:

Save the current concatenation mode switching state.

Save the current matrix switching state; the key operation is:

state.

SAVE| Save PJ

Wall:     Plan:

| Pressing again saves the Splicing mode state.
1| Save PJ

Wall: 1 Plan:

| Select ” Splicing wall 1
1| Switch OK！ Wall: 1 Plan:1| Select to save it in “Plan 1.”

Invoke the concatenation mode switching state.

Invoke the saved matrix state; the key operation is:

state.

RECALL| Recall    PJ

Wall: Plan:

| Pressing again invokes the Splicing mode

state.

1| Recall PJ

Wall:1 Plan:

| Select the invoked ” Splicing Wall 1.
1| Switch OK！ Wall: 1 Plan:1| Select the invoked “Plan 1.

Inquiry and Settings

Inquire Network Parameters

Modify Network Parameters

• For example of Changing IP Address, or modifying the original IP address from 192.168.001.188 to 192.168.001.180, the button operations are as follows:

Modify the port number, gateway, and subnet mask using the same steps as before. Press “IP” to enter the relevant interface, then navigate and modify as needed.

NOTE: Modifying network parameters requires a restart for the changes to take effect.

Common Faults and Solutions

Symptoms                    of

Malfunctions

| Solutions
---|---
Matrix Unable to Switch| l  Check command accuracy
l  If there’s no response, verify the device wiring.
l  Ensure the device is receiving proper power.
Matrix Output Without Image| l  Verify the proper functioning of the device’s respective ports and firmware version through command transmission or PC web inspection.
l  Check for input signals entering the matrix. Use matrix output or PC web switching to observe; ‘No Input’ will be displayed when there’s no signal input.
l  The matrix generates a black signal automatically when there’s no input source. Confirm if the display detects this signal.
l  If everything is normal but no signal is detected, check if the display device works by connecting a signal directly. Ensure the display supports the matrix’s current output resolution; if not, adjust the matrix’s output resolution. Alternatively, test the matrix by connecting it directly to a display.

References

• Digital Conference System, Audio Conferencing System - VISSONIC

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