EnGenius ESR-9750 Скачать руководство пользователя страница 50 | Manualshive

Страница: 50 / 85

EnGenius ESR-9750 Скачать руководство пользователя страница 50

50

Add PC MAC Address

Fill in “LAN MAC Address” and <Description> of the PC that is allowed

to access the Internet, and then click <Add>. If you find any typo before

adding it and want to retype again, just click <Reset> and the fields will be

cleared.

Remove PC MAC Address

If you want to remove some PC from the "MAC Filtering Table", select

the PC you want to remove in the table and then click <Delete Selected>.

If you want to remove all PCs from the table, just click the <Delete All>

button. If you want to clear the selection and re-select again, just click

<Reset>.

Click <Apply> at the bottom of the screen to save the above configurations.

«
...
48
49
50
51
52
...
»

Содержание ESR-9750

Страница 1: ...1 ESR 9750 Wireless Broadband 11n router 802 11n 802 11g 802 11b User Manual Version 1 6 ...

Страница 2: ... SETUP LAN WAN 10 8 PC NETWORK ADAPTER SETUP WINDOWS XP 11 9 BRING UP ESR 9750 13 10 SMART WIZARD 13 11 INITIAL SETUP ESR 9750 22 12 WIZARD 31 13 INTERNET 32 14 WIRELESS SETTINGS 36 15 FIREWALL SETTINGS 47 16 ADVANCED SETTINGS 54 17 TOOLS SETTINGS 65 18 REPEATER MODE 71 APPENDIX A FCC INTERFERENCE STATEMENT 82 APPENDIX B CE INTERFERENCE STATEMENT 83 ...

Страница 3: ...3 Revision History Version Date Notes 1 0 March16 2008 Modified from existing UM 1 5 March22 2008 Update new features ...

Страница 4: ... technology to transmit multiple steams of data in a single wireless channel giving you seamless access to multimedia content Robust RF signal travels farther eliminates dead spots and extends network range For data protection and privacy ESR 9750 encodes all wireless transmissions with WEP WPA and WPA2 encryption With inbuilt DHCP Server powerful SPI firewall ESR 9750 protects your computers agai...

Страница 5: ... Mapping DMZ IP Filter ICMP Blocking SPI Avoids the attacks of Hackers or Viruses from Internet Support 802 1x Authenticator 802 11i WPA WPA2 AES VPN pass through Provide mutual authentication Client and dynamic encryption keys to enhance security WDS Wireless Distribution System Make wireless AP and Bridge mode simultaneously as a wireless repeater Theoretical wireless signal rate based on IEEE s...

Страница 6: ...tems listed below are missing Do not discard the packing materials in case of return the unit must be shipped back in its original package 1 802 11n SOHO Router 2 100V 240V Power Adapter 3 2dBi 2 4GHz Dipole Antennas x 3 pcs 4 Quick Install Guide 5 CD User s Manual 6 Warranty card ...

Страница 7: ...7 4 Product Layout ...

Страница 8: ...PORT 1000 Mbps Lights up when 1000 Mbps data rate enabled on that specific port ITEM Description Reset Click this button to restart the system or Press this button and hold for 10 seconds to restart the system WPS Click this button to start WPS function DC IN Power connector connects to DC 12V Power Adapter LAN1 4 Local Area Network LAN ports 1 to 4 INTERNET Wide Area Network WAN port ...

Страница 9: ...ernet Explorer Safari Firefox Opera etc Few Ethernet compatible CAT5 cables 6 ESR 9750 Placement You can place ESR 9750 on a desk or other flat surface or you can mount it on a wall For optimal performance place your Wireless Broadband Router in the center of your office or your home in a location that is away from any potential source of interference such as a metal wall or microwave oven This lo...

Страница 10: ...our PC Notebook LAN port one of the 4 available LAN ports on ESR 9750 WAN connection Connect Ethernet cable between WAN ports of your ADSL CABLE modem INTERNET port of ESR 9750 Make sure your ADSL CABLE modem is working well Contact your ISP if you have any questions ...

Страница 11: ...11 8 PC Network Adapter setup Windows XP Enter Start Menu select Control panel select Network Select Local Area Connection icon select properties Select Internet Protocol TCP IP Click Properties ...

Страница 12: ...12 Select the General tab a ESR 9750 supports DHCP function please select both Obtain an IP address automatically and Obtain DNS server address automatically ...

Страница 13: ...al operation 10 Smart Wizard CHECK Internet connection should be setup ready to use ADSL or cable modem Modem must provide RJ45 port to connect with ESR 9750 Microsoft Windows compatible PC Notebook with UPnP enabled network adapter CAT 5 network cable s RJ45 port on PC Notebook STEP 1 Connect ESR 9750 WAN port your modem WAN port with RJ45 cable STEP 2 Power up ESR 9750 POWER led on front panel l...

Страница 14: ... run SMART WIZARD Click Setup Wizard to setup your ESR 9750 router Click User Manual to launch smart wizard user manual Click Adobe Reader to setup Adobe Acrobat reader on your PC Notebook Click EXIT anytime you want to abort ...

Страница 15: ...ck Next to proceed Click Exit to abort ESR 9750 should be setup as depicted above Make sure your DSL CABLE modem is setup and working Else take the help of your internet service provider Click Next to proceed ...

Страница 16: ...16 Check the MODEM and ESR 9750 connection It should be as shown below Check power connection for modem as well as ESR 9750 Make sure antenna is connected to rear panel of ESR 9750 Click Next to proceed ...

Страница 17: ...17 Notice the LED that should be light up at this stage If not check your procedures again Click Next to configure WAN Wireless settings ...

Страница 18: ...18 User name and password are admin admin Click OK Your default browser will connect to ESR 9750 Web Server http 192 168 0 1 Click Next to enter mode selection ...

Страница 19: ...s AP Repeater mode does not enable WAN interface Setup Wizard will skip WAN Configuration Click Next to automatically detect your Internet Network settings Smart Wizard has detected DHCP client Configure the host name and MAC address of your ADSL modem Click Next to proceed ...

Страница 20: ...20 Smart Wizard has finished setting up WAN Configuration Click Next to proceed Enter the name for your wireless network SSID and security key Click Next to proceed ...

Страница 21: ... entire configuration click Reboot NOTE After Wireless settings are applied you need to connect from your WLAN client with the security settings you just finished configuring Remember the type of security security key ...

Страница 22: ...terface for configuration to be accessed through your web browser such as Internet Explorer or Netscape Communicator LOGIN Procedure 1 OPEN your browser e g Internet Explorer 2 Type http 192 168 0 1 in address bar and hit Enter button on your keyboard ...

Страница 23: ...23 3 Click OK to navigate into ESR 9750 configuration home page 4 You will see the home page of ESR 9750 as follows ...

Страница 24: ...e forever so forth Once you click on OK button to go to the requested page you can see the status page of the ESR 9750 System You can see the UP time hardware information serial number as well as firmware version information WAN Settings This section displays whether the WAN port is connected to a Cable DSL connection It also displays the router s WAN IP address Subnet Mask and ISP Gateway as well...

Страница 25: ... Wizard Basic Settings Wireless Settings section Wireless configuration details such as SSID Security settings BSSID Channel number mode of operation are briefly shown LAN The LAN Tabs reveals LAN settings which can be altered at will If you are an entry level user try accessing a website from your browser If you can access website without a glitch just do not change any of these settings Click Ap...

Страница 26: ...2 1d Spanning Tree function is enabled this router will use the spanning tree protocol to prevent network loops DHCP View the current LAN clients which are assigned with an IP Address by the DHCP server This page shows all DHCP clients LAN PCs currently connected to your network The table shows the assigned IP address MAC address and expiration time for each DHCP leased client Use the Refresh butt...

Страница 27: ...re static DHCP IPs They are listed in the table Current Static DHCP Table IP address can be deleted at will from the table Click Apply button to save the changed configuration Schedule This page allows user to set up schedule function for Firewall and Power Saving ...

Страница 28: ...ow configuration of firewall and power savings services Fill in the schedule and select type of service Click Apply to implement those settings The schedule table lists the pre schedule service runs You can select any of them using the check box ...

Страница 29: ... the system log can be saved Save to a local file for further processing or the system log can be cleared Clear or it can be refreshed Refresh to get the most updated information When the system is powered down the system log will disappear if not saved to a local file Monitor Show histogram for network connection on WAN LAN WLAN Auto refresh keeps information updated frequently ...

Страница 30: ...30 ...

Страница 31: ...31 12 Wizard Click Wizard to configure the Broadband Router Setup wizard will now be displayed check that the modem is connected and click Next The details please refer to Smart Wizard Page 18 ...

Страница 32: ...P If your ISP used the MAC address of the Ethernet card as an identifier connect only the PC with the registered MAC address to the broadband router and click the Clone MAC Address button This will replace the current MAC address with the already registered Ethernet card MAC address Host Name This is optional MAC address The default value is set to the WAN s physical interface of the broadband rou...

Страница 33: ... fixed IP address enter the assigned IP address Subnet mask Default Gateway IP address and Primary DNS of your ISP provider Point to Point over Ethernet Protocol PPPoE Login Password Enter the PPPoE username and password assigned by your ISP Provider ...

Страница 34: ...he Auto reconnect option to automatically re establish the connection when an application attempts to access the Internet again Idle Timeout This is a maximum period of time for which the Internet connection is maintained during inactivity If the connection is inactive for longer than the Maximum Idle Time it will be dropped ...

Страница 35: ... Internet by simply dialing in a local point provided by your ISP provider The following screen allows client PCs to establish a normal PPTP session and provides hassle free configuration of the PPTP client on each client PC Click Apply to save configuration and connect to ISP provider ...

Страница 36: ...P route with WDS we will introduce this function later section and repeater If you choose AP Router Mode you can select AP or WDS function in the drop down menu Band You can select the wireless standards running on your network environment 2 4 GHz B If all your clients are 802 11b select this one 2 4 GHz N If all your clients are 802 11n select this one 2 4 GHz B G Either an 802 11b or an 802 11g ...

Страница 37: ...ecide a most clean channel and change to this channel if you enable this function Depend on this function enable or not you will see different item below Auto Channel Channel If Auto Channel is disabled you should choose a static channel and AP will use this channel to communicate with other clients Check Channel Time If Auto Channel is enabled you can choose a period from the drop down menu AP wi...

Страница 38: ...ecurity settings Note it does not support mixed mode such as WPA PSK WPA2 PSK Mixed mode Advanced This tab allows you to set the advanced wireless options The options included are Authentication Type Fragment Threshold RTS Threshold Beacon Interval and Preamble Type You should not change these parameters unless you know what effect the changes will have on the router ...

Страница 39: ... the interval of time that this wireless router broadcasts a beacon A Beacon is used to synchronize the wireless network Data Rate The Data Rate is the rate that this access point uses to transmit data packets The access point will use the highest possible selected transmission rate to transmit the data packets N Data Rate The Data Rate is the rate that this access point uses to transmit data pack...

Страница 40: ...d 802 11g wireless stations When the protection mode is enabled the throughput of the AP will be a little lower due to a lot of frame network that is transmitted TX Power This can be set to a bare minimum or maximum power WMM Wi Fi MultiMedia if enabled supports QoS for experiencing better audio video and voice in applications Security This Access Point provides complete wireless LAN security func...

Страница 41: ...a RADIUS server This mode only authenticates users by IEEE 802 1x but it does not encrypt the data during communication WEP Encryption When you select 64 bit or 128 bit WEP key you have to enter WEP keys to encrypt data You can generate the key by yourself and enter it You can enter four WEP keys and select one of them as a default key Then the router can receive any packets encrypted by one of th...

Страница 42: ...ncryption key Key Length You can select the WEP key length for encryption 64 bit or 128 bit The larger the key will be the higher level of security is used but the throughput will be lower Key Type You may select ASCII Characters alphanumeric format or Hexadecimal Digits in the A F a f and 0 9 range to be the WEP Key Key1 Key4 The WEP keys are used to encrypt data transmitted in the wireless netwo...

Страница 43: ...u can use a pre shared key to authenticate wireless stations and encrypt data during communication It uses TKIP or CCMP AES to change the encryption key frequently So the encryption key is not easy to be cracked by hackers This is the best security available WPA Radius Encryption Wi Fi Protected Access WPA is an advanced security standard You can use an external RADIUS server to authenticate wirel...

Страница 44: ... The wireless station will now be added into the Current Access Control List below If you are having any difficulties filling in the fields just click Clear and both MAC Address and Comment fields will be cleared Remove an address from the list If you want to remove a MAC address from the Current Access Control List select the MAC address that you want to remove in the list and then click Delete S...

Страница 45: ...st for you The wireless router supports two types of WPS WPS via Push Button and WPS via PIN code If you want to use the Push Button you have to push a specific button on the wireless client or in the utility of the wireless client to start the WPS mode and switch the wireless router to WPS mode You can simply push the WPS button of the wireless router or click the Start to Process button in the w...

Страница 46: ...he wireless connection Passphrase Key It shows the passphrase key that is randomly generated by the wireless router during the WPS process You may need this information when using a device which doesn t support WPS Interface If device is set to repeater mode you can choose Client interface to connect with other AP by using WPS otherwise you may choose AP interface to do WPS with other clients WPS ...

Страница 47: ...f you have a client PC that cannot run an Internet application e g Games properly from behind the NAT firewall then you can open up the firewall restrictions to unrestricted two way Internet access by defining a DMZ Host The DMZ function allows you to re direct all packets going to your WAN port IP address to a particular IP address in your LAN The difference between the virtual server and the DMZ...

Страница 48: ... Apply at the bottom of the screen to save the above configurations Denial of Service DoS The Broadband router s firewall can block common hacker attacks including Denial of Service Ping of Death Port Scan and Sync Flood If Internet attacks occur the router can log the events Ping of Death Protections from Ping of Death attack Discard Ping From WAN The router s WAN port will not respond to any Pin...

Страница 49: ... to set that configuration Access Control allows users to define the traffic type permitted in your LAN You can control which PC client can have access to these services Enable MAC Filtering Check to enable or disable MAC Filtering Deny If you select Deny then all clients will be allowed to access Internet accept for the clients in the list below Allow If you select Allow then all clients will be ...

Страница 50: ...and the fields will be cleared Remove PC MAC Address If you want to remove some PC from the MAC Filtering Table select the PC you want to remove in the table and then click Delete Selected If you want to remove all PCs from the table just click the Delete All button If you want to clear the selection and re select again just click Reset Click Apply at the bottom of the screen to save the above con...

Страница 51: ...ents will be allowed to access Internet accept for the clients in the list below Allow If you select Allow then all clients will be denied to access Internet accept for the PCs in the list below Add PC IP Address You can click Add PC to add an access control rule for users by an IP address or IP address range ...

Страница 52: ... Delete All button Click Apply at the bottom of the screen to save the above configurations URL Filter You can block access to some Web sites from particular PCs by entering a full URL address or just keywords of the Web site Enable URL Blocking Enable or disable URL Blocking Add URL Keyword Fill in URL Keyword and then click Add You can enter the full URL address or the keyword of the web site yo...

Страница 53: ... keywords from the Current URL Blocking Table select the URL keyword you want to remove in the table and then click Delete Selected If you want remove all URL keywords from the table click Delete All button If you want to clear the selection and re select again just click Reset Click Apply at the bottom of the screen to save the above configurations ...

Страница 54: ...ides Firewall protection from hacker attacks and has the flexibility to allow you to map Private IP Addresses to Public IP Addresses for key services such as Websites and FTP Select Disable to disable the NAT function Port Mapping Port Mapping allows you to re direct a particular range of service port numbers from the Internet WAN Port to a particular LAN IP address It helps you to host servers be...

Страница 55: ...pe to be forwarded You can choose to forward TCP or UDP packets only or select BOTH to forward both TCP and UDP packets Port Range The range of ports to be forward to the private IP Add Port Mapping Fill in the Local IP Type Port Range and Description of the setting to be added and then click Add Then this Port Mapping setting will be added into the Current Port Mapping Table below If you find any...

Страница 56: ...ctions Click Apply at the bottom of the screen to save the above configurations Port Forwarding Virtual Server Use the Port Forwarding Virtual Server function when you want different servers clients in your LAN to handle different service Internet application type e g Email FTP Web server etc from the Internet Computers use numbers called port numbers to recognize a particular service Internet app...

Страница 57: ... packet will be sent to Public Port Port number will be changed to Local Port when the packet enters your LAN Network Type Select the port number protocol type TCP UDP or both If you are unsure then leave it to the default both setting Public Port enters the service service Internet application port number from the Internet that will be re directed to the above Private IP address host in your LAN ...

Страница 58: ...m the Current Port Forwarding Table select the Port Forwarding settings you want to remove in the table and then click Delete Selected If you want to remove all Port Forwarding settings from the table just click the Delete All button Click Reset will clear your current selections Click Apply at the bottom of the screen to save the above configurations Port Triggering Special Applications Some appl...

Страница 59: ...ort Enter the In coming Inbound port or port range for this type of application e g 2300 2400 47624 Public Type Select the Inbound port protocol type TCP UDP or BOTH Popular Applications This section lists the more popular applications that require multiple connections Select an application from the Popular Applications selection Once you have selected an application select a location 1 10 in the ...

Страница 60: ...to make a mistake just click Clear and the fields will be cleared Remove Port Triggering If you want to remove Special Application settings from the Current Trigger Port Table select the Port Triggering settings you want to remove in the table and then click Delete Selected If you want remove all Port Triggering settings from the table just click the Delete All button Click Reset will clear your c...

Страница 61: ... the virtual server sections Quality of Service QoS QoS can let you classify Internet application traffic by source destination IP address and port number You can assign priority for each type of application and reserve bandwidth for it The packets of applications with higher priority will always go first Lower priority applications will get bandwidth after higher priority applications get enough ...

Страница 62: ...AN port You can also uncheck to disable Priority High or Low priority level of the transmit packets Ingress Rate The throughput limit of receiving packets Egress Rate The throughput limit of sending packets Application based Qos This is the application based QoS control method You can reserve or limit the bandwidth of some LAN IP address and port number They will guarantee the throughput in WAN co...

Страница 63: ...rst Unlimited Priority Queue The LAN IP address will not be bounded in the QoS limitation High Low Priority Queue This can put the packets in the protocol and port range to High Low QoS Queue Bandwidth Allocation This can reserve limit the throughput of specific protocols and port range You can set the upper bound and Lower bound ...

Страница 64: ...64 Routing You can set enable Static Routing to let the router forward packets by your routing policy ...

Страница 65: ...rs and are case sensitive Current Password Fill in the current password to allow changing to a new password New Password Enter your new password and type it again in Repeat New Password for verification purposes Remote management This allows you to designate a host in the Internet the ability to configure the Broadband router from a remote site Enter the designated host IP Address in the Host IP A...

Страница 66: ...t number of the remote management web interface Enabled Check to enable the remote management function Click Apply at the bottom of the screen to save the above configurations Time The Time Zone allows your router to reference or base its time on the settings configured here which will affect functions such as Log entries and Firewall settings Time Zone Select the time zone of the country you are ...

Страница 67: ...figurations DDNS DDNS allows you to map the static domain name to a dynamic IP address You must get an account password and your static domain name from the DDNS service providers This router supports DynDNS TZO and other common DDNS service providers Enable Disable DDNS Enable or disable the DDNS function of this router Server Address Select a DDNS service provider Host Name Fill in your static d...

Страница 68: ...Ethernet mode can be enabled disabled in this page Firmware This page allows you to upgrade the router s firmware To upgrade the firmware of your Broadband router you need to download the firmware file to your local hard disk and enter that file name and path in the appropriate field on this page You can also use the Browse button to find the firmware file on your PC ...

Страница 69: ... can re load the saved configurations into the router through the Restore Settings If extreme problems occur you can use the Restore to Factory Defaults to set all configurations to its original default settings Backup Settings This can save the Broadband router current configuration to a file named config bin on your PC You can also use the Upload button to restore the saved configuration to the ...

Страница 70: ...tore to Factory Defaults tool to force the Broadband router to perform a power reset and restore the original factory settings Reset You can reset the broadband router when system stops responding correctly or stop functions ...

Страница 71: ...tion homepage under REPEATER mode now Status System status section allows you to monitor the current status of your router You can use the status page to quickly see if you have any updated firmware available bug fixes updates You can navigate from this page with a few interesting options for reminding or skipping this page forever so forth Once you click on OK button to go to the requested page y...

Страница 72: ...el number mode of operation are briefly shown WLAN Settings View Broadband router s current configuration settings Device Status displays the configuration settings you ve configured in the Wizard Basic Settings Wireless Settings section LAN The LAN Tabs reveals LAN settings which can be altered at will If you are an entry level user try accessing a website from your browser If you can access webs...

Страница 73: ...s is disabled by default If 802 1d Spanning Tree function is enabled this router will use the spanning tree protocol to prevent network loops Schedule Add schedule edit schedule options allow configuration of power savings services Fill in the schedule and select type of service Click Apply to implement the settings The schedule table lists the pre schedule service runs You can select any of them ...

Страница 74: ...stem log can be saved Save to a local file for further processing or the system log can be cleared Clear or it can be refreshed Refresh to get the most updated information When the system is powered down the system log will disappear if not saved to a local file Monitor Show the network packets histogram for network connection on WAN LAN WLAN Auto refresh keeps information updated frequently ...

Страница 75: ...75 Wireless You can set parameters that are used for the wireless stations to connect to this router The parameters include Mode ESSID Channel Number and Associated Client ...

Страница 76: ... LAN should have the same ESSID Channel Number The channel used by the wireless LAN All devices in the same wireless LAN should use the same channel Site Survey You can scan the current Wireless Access Point and connect on it Tools This section has many useful and miscellaneous features Admin You can change the password required to log into the broadband router s system web based management By def...

Страница 77: ...w password and in Repeat New Password for verification purposes Click Apply at the bottom of the screen to save the above configurations Time The Time Zone allows your router to reference or base its time on the settings configured here which will affect functions such as Event Log entries and Schedule settings ...

Страница 78: ...erver Address Daylight Savings The router can also take Daylight Savings into account If you wish to use this function you must select the Daylight Savings Time period and check tick the enable box to enable your daylight saving configuration Click Apply at the bottom of the screen to save the above configurations Power Saving power in WLAN Ethernet mode can be enabled disabled in this page ...

Страница 79: ...ou need to download the firmware file to your local hard disk and enter that file name and path in the appropriate field on this page You can also use the Browse button to find the firmware file on your PC Once you ve selected the new firmware file click Apply at the bottom of the screen to start the upgrade process ...

Страница 80: ...ons to its original default settings e g when you first purchased the router Restore Settings This can save the Broadband router current configuration to a file named config bin on your PC You can also use the Upload button to restore the saved configuration to the Broadband router Alternatively you can use the Restore to Factory Defaults to force the Broadband router to perform a power reset and ...

Страница 81: ...81 ...

Страница 82: ...rease the separation between the equipment and receiver Connect the equipment into an outlet on a circuit different from that to which the receiver is connected Consult the dealer or an experienced radio TV technician for help This device complies with Part 15 of the FCC Rules Operation is subject to the following two conditions 1 This device may not cause harmful interference and 2 this device mu...

Страница 83: ...tive EN 301 489 1 V1 6 1 2005 09 Electromagnetic compatibility and Radio Spectrum Matters ERM ElectroMagnetic Compatibility EMC standard for radio equipment and services Part 1 Common technical requirements EN 301 489 17 V1 2 1 2002 08 Electromagnetic compatibility and Radio spectrum Matters ERM ElectroMagnetic Compatibility EMC standard for radio equipment and services Part 17 Specific conditions...

Страница 84: ...turer ΗΛΩΝΕΙ ΟΤΙ type of equipment ΣΥΜΜΟΡΦΩΝΕΤΑΙ ΠΡΟΣ ΤΙΣ ΟΥΣΙΩ ΕΙΣ ΑΠΑΙΤΗΣΕΙΣ ΚΑΙ ΤΙΣ ΛΟΙΠΕΣ ΣΧΕΤΙΚΕΣ ΙΑΤΑΞΕΙΣ ΤΗΣ Ο ΗΓΙΑΣ 1999 5 ΕΚ Français French Par la présente nom du fabricant déclare que l appareil type d appareil est conforme aux exigences essentielles et aux autres dispositions pertinentes de la directive 1999 5 CE Italiano Italian Con la presente nome del costruttore dichiara che questo...

Страница 85: ...venimi zahtevami in ostalimi relevantnimi določili direktive 1999 5 ES Slovensky Slovak Meno výrobcu týmto vyhlasuje že typ zariadenia spĺňa základné požiadavky a všetky príslušné ustanovenia Smernice 1999 5 ES Suomi Finnish Valmistaja manufacturer vakuuttaa täten että type of equipment laitteen tyyppimerkintä tyyppinen laite on direktiivin 1999 5 EY oleellisten vaatimusten ja sitä koskevien direk...

Отзывы:

Нет отзывов