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Local Interface Configuration 34

Online users

Figure 3-10

3.2.4.3 Status

You can view fan speed, card, temperature and source information, device time, net percentage,

CPU percentage and memory percentage.

In the main menu, select

System Info >

Status

The

Status

interface is displayed. See Figure 3-11 and Table 3-5.

Содержание M60

Страница 1: ...Video Matrix Platform M60 User s Manual V2 1 0...

Страница 2: ...er performance or unpredictable result TIPS Provides methods to help you solve a problem or save you time NOTE Provides additional information as the emphasis and supplement to the text Revision Histo...

Страница 3: ...written notice The product updates might cause some differences between the actual product and the manual Please contact the customer service for the latest program and supplementary documentation The...

Страница 4: ...d output Do not dissemble the Device Transport use and store the Device under the allowed humidity and temperature conditions Electrical Safety Use the battery of specified manufacturer otherwise ther...

Страница 5: ...US 8 CH 3G SDI Encoding Card 14 1 5 6 VEC1605UH 16 CH UHD Encoding Card 14 1 5 7 VEC0805UH 8 CH UHD Encoding Card 15 1 5 8 VDC0905H 9 CH HD HDMI Decoding Card 16 1 5 9 VDC1205H 12 CH HD HDMI Decoding...

Страница 6: ...nagement 44 4 4 Preview 57 4 4 1 Window Function 58 4 4 2 Signal Configuration 59 4 4 3 PTZ Control Panel 60 4 5 Setup 62 4 5 1 System Config 62 4 5 2 Network 74 4 5 3 Event Management 80 4 5 4 Signal...

Страница 7: ...ction card Connect analog HD SDI camera and IPCs With HDMI port achieve matrix switch encoding and decoding Support online real time preview Appearance of 12U video matrix platform Figure 1 1 Appearan...

Страница 8: ...gh speed data flow Compression card s hot swap button and indicator for users flexible extension on the application and knowledge of compression card status Various ports of compression card such as U...

Страница 9: ...digital video full crossing switch matrix based on different applied compression card combinations forming digital video full crossing switch matrix with different specifications A V decoding card sup...

Страница 10: ...rix platform host One 12U host supports 10 function cards One MBC0050 main control panel Two built in power adaptors redundant Standard M60 7U One 7U host supports 5 function cards One MBC0050 main co...

Страница 11: ...coding card 8 ch 8 ch 3G SDI video input BNC One DVI audio input port 8 ch 2 ch RS 485 port Optional VEC1605UH 16 ch UHD encoding card 16 ch HDMI video input 4 ch VGA video input Two VGA audio input p...

Страница 12: ...icator lights on the front panel display device working status See Table 1 2 Table 1 2 Function introduction ON OFF button Power indicator light Red Not operating after plugged in Red Blue Operating N...

Страница 13: ...d slots of main control panel are marked to M Dual power module supports 220V and 48V module 1 4 2 7U Host Case Video Matrix Platform with 19 inch 7U structure host case includes function card slot po...

Страница 14: ...is as below Single fan box air intake of host with dust filter at side Three groups of intelligent temperature controlling fans allow hot swap Five interface board slots of function card are labeled...

Страница 15: ...y output port Connec LCD screen 11 DVI One Local display output port Connec LCD screen 12 DVI One Decoding output port 13 USB Port Two Connect mouse keyboard USB 14 Audio Output One For audio talk 15...

Страница 16: ...C signal input H 264 video compression technology G711a PCM and G711u audio compression standard Video encoding parameter is adjustable in each channel including resolution frame rate bit stream rate...

Страница 17: ...IO Functions H 264 video compression technology G711a PCM and G711u audio compression standard Video encoding parameter is adjustable in each channel including resolution frame rate bit stream rate im...

Страница 18: ...80 1024 60Hz 1280 960 60Hz 1280 800 60Hz 1280 720 60Hz 1152 864 60Hz 1024 768 60Hz 800 600 60Hz H 264 video compression technology G711a PCM and G711u audio compression standard Video encoding paramet...

Страница 19: ...Support 1080P 30Hz 1080P 25Hz 720P 60Hz 720P 50Hz 720P 30Hz 720P 25Hz H 264 video compression technology G711a PCM and G711u audio compression standard Video encoding parameter is adjustable in each...

Страница 20: ...logy G711a PCM and G711u audio compression standard Video encoding parameter is adjustable in each channel including resolution frame rate bit stream rate image quality and etc Each channel supports s...

Страница 21: ...ream rate image quality and etc Each channel supports schedule and event compression parameters Support composite and video stream encoding A V is synchronized in composite stream encoding Dual stream...

Страница 22: ...1 5 7 2 Port Introduction AIN audio input port DB15 port VIN video input port HDMI and VGA port 1 5 8 VDC0905H 9 CH HD HDMI Decoding Card VDC0905H 9 ch HD HDMI decoding card Figure 1 15 1 5 8 1 Main...

Страница 23: ...t HDMI port 1 5 10 VDC1505H 15 CH HD HDMI Decoding Card VDC1505H 15 ch HD HDMI decoding card Figure 1 17 1 5 10 1 Main Features 15 ch HDMI digital video port output 15 ch audio output 2 ch RS 485 port...

Страница 24: ...utput 18 ch audio output 2 ch RS 485 port 4 ch alarm input port 2 ch alarm output port One power switch 14 indicators power PCIE indicator decoding chip operating indicator 1 5 11 2 Port Introduction...

Страница 25: ...be provided when dialing after sales calls This label shall be protected well and shall not be torn or discarded otherwise we may not be able to provide effective service Accompanied Assessory Bag 2...

Страница 26: ...c shielding methods to resist interference Environmental Requirement Ensure that temperature in the cabinet is 0 50 Ensure that humidity in the machine room is 10 RH 90 RH Ensure air ventilation requi...

Страница 27: ...terface board tighten the set screws and then insert front panel When inserting main control panel and control panel pull the extraction tool and then insert the panel in place by pushing the extracti...

Страница 28: ...2 4 Ground terminal of Video Matrix Platform must be properly grounded See Figure Step 6 2 5 To guarantee personal safety and device safety Video Matrix Platform and those devices such as video wall...

Страница 29: ...ly of most devices can be grounded directly In this case their grounding terminals don t require grounding treatment Connect network cable VGA cable and other cables Step 7 Plug in and press ON OFF bu...

Страница 30: ...a UPS is the best choice if possible 2 3 3 2 Shutdown Method 1 is recommended in order to protect the device from damages due to unexpected outage Stop all operations of the device before you unplug t...

Страница 31: ...terface is displayed See Figure 3 1 Device initialization Figure 3 1 Set the password of admin user Step 2 Password can be non blank characters with 8 32 digits and shall include at least 2 types of c...

Страница 32: ...nput password click OK to log in the system Step 5 Password security measure In case that password is wrong for 5 times within every 30 minutes the account will be locked 3 1 2 Main Interface After no...

Страница 33: ...nal menu Figure 3 4 Table 3 1 Functional description Name Description Main menu Display main menu including system setting system info and shutdown Shutdown Shut down the device Advanced Operation of...

Страница 34: ...ers Network Set IP address video data transmission protocol and other parameters System info Version View the version details such as system hardware feature software version and build date Online use...

Страница 35: ...g shall be carried out by authorized users only 3 2 3 1 General You can configure basic information of the device such as device information system time and date format In the main menu select System...

Страница 36: ...Save Date Format Select date display format including YYYY MM DD MM DD YYYY and DD MM YYYY Date Separator Separator of date format Time Format Select 24 hour or 12 hour Language Switch menu language...

Страница 37: ...erface is displayed See Figure 3 8 Network Figure 3 8 Configure parameters See Table 3 4 Step 2 Table 3 4 Network parameters description Parameter Description Net Mode The default setting is fault tol...

Страница 38: ...DHCP is disabled static IP information will restore default settings You need to configure IP again When PPPoE is enabled IP address subnet mask gateway and DHCP cannot be changed Subnet Mask Enter su...

Страница 39: ...w the version details such as system version build date web version and serial number 3 2 4 2 Online Users You can view online users that visit the video matrix platform remotely In the main menu sele...

Страница 40: ...3 10 3 2 4 3 Status You can view fan speed card temperature and source information device time net percentage CPU percentage and memory percentage In the main menu select System Info Status The Status...

Страница 41: ...line status Temperature Information Display present temperature and status of cards Source Information Display the status of two powers Time Display present time of video matrix platform Net Percentag...

Страница 42: ...2 Logout menu user Exit the menu and you need to input password to enter the menu again Shutdown Exit the system and turn off power supply Restart system Exit the system and restart the system Switch...

Страница 43: ...n Security Custom Level select ActiveX Step 5 and plug in to be Enable or Prompt Recommended IE browser is IE8 and later version System Login 4 2 Enter IP address of video matrix platform in the addre...

Страница 44: ...oints for attention and highlights on the page Step 5 Please conform to the points for attention Click to close the page Tick Do not show again so this page will not show when you log in for the next...

Страница 45: ...e tab you can view local signal and channel information preview and display the signal on the video wall In Custom tab you can view signal group information and configure signal tour on the video wall...

Страница 46: ...igure 4 5 Adding video wall Figure 4 5 Click in the center of interface to enter Video Wall Setup interface See 4 5 5 1 Video Wall Setup 4 3 2 Window Configuration 4 3 2 1 Adding a Window Press and ho...

Страница 47: ...Name Description 1 Start stop signal tour Click the icon to start signal tour and the icon becomes Click to stop signal tour Configure the tour setting of signal See 4 3 3 4 Signal Tour 2 Split Split...

Страница 48: ...configuration 4 3 3 Signal Configuration You can select signal directly or enter signal name in search bar to search signal 4 3 3 1 Device Tree Device tree displays all local signals and the added ne...

Страница 49: ...rag the configured signal group to a window to tour play the signals on the window Set the stay time and stream type Configure signal group in Collection tab See 4 5 4 3 Signal Group Select a window t...

Страница 50: ...figure multiple video schemes to be displayed on the screen in turn and thus manage them Click Step 1 The Video Scheme interface is displayed See Figure 4 11 Video scheme Figure 4 11 Click to save the...

Страница 51: ...nguishes different schemes when central control device issues commands 4 3 4 1 2 Collection Scheme Save virtual LED and background configuration to be a collection scheme Multiple collection schemes c...

Страница 52: ...cheme you want Step 3 Click OK to save the combined plan See Figure 4 17 Step 4 Save combined plan Figure 4 17 For other configurations see 4 3 4 1 1 Video Scheme 4 3 4 1 4 Switch Timer After setting...

Страница 53: ...ll take effect Two scheme time periods shall not be the same Click OK Step 3 4 3 4 2 Auto align Click and all windows will be automatically aligned in the following way See Figure 4 19 Each window siz...

Страница 54: ...ed and previous signal will not be kept Select Window Split Block Division Step 1 The Block Division interface is displayed See Figure 4 20 Block division Figure 4 20 Select the fixed split or enter t...

Страница 55: ...tour window should not be selected for window split Select Window Split Window Split Step 2 The Window Split interface is displayed See Figure 4 23 Window split Figure 4 23 Select the fixed split or...

Страница 56: ...the power switch and adjust screen whereas LED CLT protocol only supports power switch function For screen protocol configuration see 4 5 5 2 1 Screen Setup 4 3 4 6 1 Screen Power According to require...

Страница 57: ...nt connect the video matrix platform with serial port cable of LED screen in order to control the power of LED screen If manufacturer protocol is DH LED N or LED CLT video signal can be displayed on L...

Страница 58: ...en tab The Adjust Screen interface is displayed See Figure 4 27 Adjust screen Figure 4 27 Configure screen display parameters depending on the hardware of display device 4 3 4 7 Lock Video Wall Click...

Страница 59: ...gy and show screen ID 4 3 4 9 1 PTZ Control PTZ control is to turn the PTZ device up down left right top left bottom left top right and bottom right carry out focus zoom and iris operations Select dis...

Страница 60: ...preview interface Then select different functions with direction key to operate PTZ Click to turn off the PTZ menu of preview interface 4 3 4 9 2 Virtual LED Divide a customized area on the video wal...

Страница 61: ...or click the color area to select Time OSD Select the left check box to enable the function Date Week and Time are displayed by default Please select time display type according to your need Select a...

Страница 62: ...ter 6 digit RGB value manually or click the color area to select Click OK Step 4 Virtual LED displays the title See Figure 4 32 Move your mouse onto virtual LED press and hold left mouse button and mo...

Страница 63: ...ork signal window click and then click Step 1 The Decoding Strategy interface is displayed See Figure 4 34 Decoding strategy Figure 4 34 Drag the slider to adjust window fluency Step 2 Greater fluency...

Страница 64: ...work Signal interface You can add modify and delete device See 4 5 4 1 Network Signal 4 Video wall Click to enter Video Wall Setup interface You can add modify and delete video wall See 4 5 5 1 Video...

Страница 65: ...and zoom out the video image with wheel button 2 Local record Click the icon to record the video The recorded video file is saved in the recorded video path as configured in 4 5 1 11Storage Path 3 Sna...

Страница 66: ...the group See 4 5 4 3 Signal Group 4 4 2 3 Image Preview Add signal to preview window so you can preview the video in preview window Select a preview window Step 1 Select signal source in Device or C...

Страница 67: ...camera moves to the location of preset point Point Tour In the input box enter tour path and click Start to start tour Click Stop to stop tour Enter preset point number and then click Add to add this...

Страница 68: ...Setup System Config General General Step 1 The General interface is displayed See Figure 4 38 General Figure 4 38 Configure parameters See Table 4 8 Step 2 Table 4 8 General parameters description Par...

Страница 69: ...lect the check box to enable function to synchronize remote device time DST Select the check box to enable DST DST Type Select DST type including Date and Week Start Time End Time When DST Type is Dat...

Страница 70: ...factory defaults maximum user quantity is 64 while maximum user group quantity is 20 There are two level management modes user and user group Group name and user name shall be unique One user can onl...

Страница 71: ...the group authority To conveniently manage the user it is suggested that general user authorities shall be lower than high level user authorities In Authority list select operating authorities for the...

Страница 72: ...2 Input old password input new password and confirm password Step 3 Click OK Step 4 Delete User Click corresponding to the user you want to delete 4 5 1 2 2 Group Different users may have different a...

Страница 73: ...ickly Select Setup System Config Config Backup The Config Backup interface is displayed See Figure 4 44 Config backup Figure 4 44 Click Import Config and then select configuration file backup to impor...

Страница 74: ...ll be lost Be cautious 4 5 1 5 System Upgrade Store upgrade file in PC that is associated with video matrix platform You can import upgrade file to upgrade the system version Select Setup System Confi...

Страница 75: ...t the background in video wall configuration See 4 3 4 9 3 Background 4 5 1 7 Fan Control You can configure fan temperature control and buzzer alarm 4 5 1 7 1 Fan Temperature You can configure differe...

Страница 76: ...gure time setup Step 2 Click OK Step 3 Click Close Buzzer to close the buzzer alarm function 4 5 1 8 PTZ Setup PTZ is a mechanical platform that carries camera and protective hood and provides remote...

Страница 77: ...ress Set device address ranging from 0 to 255 Baud Rate Set baud rate of device keep consistent with camera Data Bit Set device data bit including 5 6 7 and 8 Stop Bit Set device stop bit including st...

Страница 78: ...1 and 2 Baud Rate Configure Baud rate of comm It shall be consistent with the device that will be connected Parity Select a parity mode from N A Odd Even Flag Parity and Empty Parity Address Configur...

Страница 79: ...HTTPS interface the PC can login by HTTPS to ensure the security of communication data and guard the users information and device security with stable technology measure Select Setup System Config Saf...

Страница 80: ...r snapshot and monitor record is C PictureDownload and C RecordDownload respectively 4 5 2 Network 4 5 2 1 TCP IP Set device IP address DNS server information and other information according to networ...

Страница 81: ...It is IPv4 by default Preferred DNS Server Enter the configured IP address of DNS server Alternate DNS Server Enter the configured IP address of alternate DNS server Default Net Card Select default ne...

Страница 82: ...ance Two Ethernet cards use one IP address and all of them work together to bear network load the bound network throughputs are basically the same If one Ethernet card breaks down the other Ethernet c...

Страница 83: ...P If DHCP is effective if DHCP is disabled static IP information will restore default settings You need to configure IP again IP Address Enter numbers to change the IP address and then configure its S...

Страница 84: ...en requesting RTSP streaming media service of real time monitoring stream the URL should be specified in the request channel number stream type as well as user name and password if you need authentica...

Страница 85: ...tep 2 The system displays white list and black list single selection box Add white list or black list Step 3 1 Select White List or Black List 2 Click Add The Add interface is displayed See Figure 4 5...

Страница 86: ...o synchronize system time and ensure the system time is correct Select Setup Network Sync IP Step 1 The Sync IP interface is displayed See Figure 4 60 Sync IP Figure 4 60 Enter IP address and then cli...

Страница 87: ...ystem activates a buzzer alarm when an alarm event occurs Log The log records alarm information when an alarm event occurs Click Save Step 4 4 5 4 Signal Management You can manage network signal local...

Страница 88: ...in the LAN See Figure 4 65 Searching signal Figure 4 65 Filter device type in Display Filter For example select IPC and all IPC devices will be displayed here Select the check box corresponding to the...

Страница 89: ...lay Saved successfully again If Connection Status remains Failed the device might not be started or a black list has been configured or it is not included in a white list Enter IP address in Search Ad...

Страница 90: ...the username to log in the device to be added Password Configure the password to log in the device to be added Channel No Number of connected channels Click OK Step 3 This network signal is displayed...

Страница 91: ...t of the field meaning the network signal is arranged in descending order Click it again and the icon turns into meaning the network signal is arranged in ascending order 4 5 4 2 Local Signal Configur...

Страница 92: ...figure slot signal type and color of the channel Select Setup Signal Management Local Signal Input Channel Setup Step 1 The Input Channel Setup interface is displayed See Figure 4 70 Input channel set...

Страница 93: ...am And only one sub stream is supported Select different streams for different recording events A V Enable Determine whether audio or video is captured during recording The main stream video is enable...

Страница 94: ...udio stream Click OK Step 3 4 5 4 2 4 OSD Custom Customize OSD effect of local signal so time and channel title will be overlaid onto video Select Setup Signal Management Local Signal OSD Custom Step...

Страница 95: ...3 Click Edit Title Step 2 The editing box pops up and 6 titles can be configured at the same time See Figure 4 74 Edit title Figure 4 74 Edit the titles and click OK Step 3 Titles are displayed on the...

Страница 96: ...e to save it Step 4 Select existing formats in Format Click Apply to This custom OSD style will be applied to other slots Select a new format and click Delete this style to delete it Set Time Title Se...

Страница 97: ...configured coordinate Select Setup Signal Management Local Signal Capture Custom Step 1 The Capture Custom interface is displayed See Figure 4 77 Capture custom Figure 4 77 Select the slot and channel...

Страница 98: ...5 4 3 Signal Group Customize signal group Signal Group tab displays added group and signal source You can drag signal group to the window for loop play of signals in the group Select Setup Signal Mana...

Страница 99: ...has been created See Figure 4 81 Creation is completed Figure 4 81 Move your mouse pointer to group name Icons are displayed See Figure 4 82 Editing icons Figure 4 82 Click to create a sub group under...

Страница 100: ...4 Click Step 5 Signals have been divided into groups See Figure 4 84 Grouping is completed Figure 4 84 Select a signal from a group and click to delete the signal Select All to select all the signals...

Страница 101: ...e 4 85 Video wall setup Figure 4 85 4 5 5 1 1 Adding Video Wall Click Add Video Wall Step 1 The Video Wall Layout Setup interface is displayed See Figure 4 86 Video wall layout setup Figure 4 86 Confi...

Страница 102: ...d you can add a custom screen 6 Splicing Select separate screens and click this icon to splice them Splicing screen cannot be selected Single screens shall be connected horizontally or vertically 7 Ca...

Страница 103: ...For single screen it still shows Screen 1 Screen 2 and so on Double click to modify block name Show block name Figure 4 90 Select Show Block Control ID and control ID of every block will be shown Show...

Страница 104: ...video wall shall be bound with slot channel otherwise when you click Done the system will prompt you that There is sub screen without bound decoding channel in screen Slot cannot be bound repeatedly...

Страница 105: ...ck Step 6 The Block Setup interface is displayed See Figure 4 93 Block setup Figure 4 93 Set parameters See Table 4 23 Step 7 Table 4 23 Block setup parameters description Parameter Description Name C...

Страница 106: ...d modify video wall information in the pop up Video Wall Layout Setup interface See 4 5 5 1 1 Adding Video Wall 4 5 5 1 3 Deleting Video Wall Tick the video wall check box click Delete or to delete th...

Страница 107: ...s ON OFF commands to all screens continuously and ensures that each screen receives commands and turns ON OFF Select Setup Display Management Screen Management Screen ON OFF Step 1 The Screen ON OFF i...

Страница 108: ...ds of one week have been configured Click Apply to Screen and select another slot in the pop up interface to apply this configuration to the slot Click Apply to Week and select another week in the pop...

Страница 109: ...output port of the device is not connected with the display Audio Mode Configure audio output mode including Out to SubCard Out to MainCard and Both Out to SubCard Decoding sound is output from audio...

Страница 110: ...value does not affect the overall brightness of image Screen Window Color Configure screen and window color including black black and blue green Click OK Step 3 4 5 5 3 2 Global Setup You can configu...

Страница 111: ...ze See 4 3 2 3 Configuring Window Information Abnormal Stream Filtering The system checks and filters abnormal stream in order to prevent green screen Plan Neat Switching Plan stream will be switched...

Страница 112: ...camera enables human motor vehicle and non motor vehicle recognition function and video matrix platform enables human motor vehicle and non motor vehicle structure function the camera collects video s...

Страница 113: ...You can view card status type port type and temperature status of the video matrix platform Select Info Device Info Card Info The Card Info interface is displayed See Figure 4 102 This slot has a card...

Страница 114: ...Info Device Info Device Info Step 1 The Device Info interface is displayed See Figure 4 104 Device info Figure 4 104 Select Device Info or Card Log and click Get Step 2 The device info or card log is...

Страница 115: ...fer interface is displayed See Figure 4 106 Network sniffer Figure 4 106 Set parameters according to your actual situation See Table 4 27 Step 2 Table 4 27 Network sniffer parameter description Parame...

Страница 116: ...orm is connected normally Select Info Device Info Device Info Ping Step 1 The Ping interface is displayed See Figure 4 108 Ping Figure 4 108 Enter the IP address and ping times and click Ping Step 2 A...

Страница 117: ...re log level Step 2 Click OK Step 3 4 6 1 4 System Status You can view network status fan status power status CPU status and memory status of the video matrix platform Select Info Device Info System S...

Страница 118: ...nd Time and Type and then click Search Step 2 The searched logs are displayed Click the log to show details Click Clear to clear all log information of the device Log information cannot be cleared acc...

Страница 119: ...About Select Info Device Info About and you can view version information about this device 4 6 2 Help In the Info Help User s Manual you can read user s manual online and you can click Download to do...

Страница 120: ...ion Besides web remote control can be realized with Digital Surveillance System DSS and Professional Surveillance System PSS For specific operations please refer to the user s manual of Digital Survei...

Страница 121: ...splay after the device is connected with power supply and booted up A This may be due to It takes some time to boot up after connection with power supply During the period the screen is black Booting...

Страница 122: ...al time image problem For example video image color and brightness are distorted seriously A This may be due to The device is incompatible with the monitor resistance ground connection is inconsistent...

Страница 123: ...of the battery Bad crystal oscillator 12 Q Device cannot control PTZ A This may be due to Front end PTZ failure Incorrect PTZ installation Incorrect wiring PTZ parameter setups in the device are incor...

Страница 124: ...nterface card breaks down 17 Q Alarm signal cannot be disarmed A This may be due to Alarm setup is incorrect Alarm output has been enabled manually Input device breaks down or connection is incorrect...

Страница 125: ...g and electrical shock risks During wiring make sure to dismantle binding post of the battery Protect the device from water or excessive dampness since water and excessive dampness may lead to short c...

Страница 126: ...haracter in front of cursor In numerical input mode Space key means zero clearing while backspace key means to clear the last number In special symbol input mode Space key means to input a space while...

Страница 127: ...merical value Switch items in the combo box Page up or page down Move mouse Select and move the control or one item of the control under current coordinate Drag mouse Select a motion detection area wi...

Страница 128: ...tem is equipped with the latest security patches and fixes When the equipment is connected to the public network it is recommended to enable the auto check for updates function to obtain timely inform...

Страница 129: ...ary Services and Choose Secure Modes If not needed it is recommended to turn off some services such as SNMP SMTP UPnP etc to reduce risks If necessary it is highly recommended that you use safe modes...

Страница 130: ...s from external network The network should be partitioned and isolated according to the actual network needs If there are no communication requirements between two sub networks it is suggested to use...

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