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  WB-2P-LR5. User manual

61




NAT Settings:

If there is modification of network addresses between client and ACS server (NAT – network address translation), 

ACS server might not have the opportunity to establish connection with the client if certain technologies are not 

used to avoid it. The techologies help the client to define so called public address (NAT addresses – an address 

of external gateway, behind which the client is located). When the public address is defined, the client inform the 
server. Then, the server uses the public address (not the local) to establish connection with the client.

NAT mode

 – defines how client should obtain public address. The following modes are available:

STUN

 – use STUN protocol for defining public address;

Manual

 – manual mode, when public address is set manually in the configuration; in this mode, you 

should add the rule for forwarding of TCP port used by TR-069 client on the device implementing NAT 
functions;

Off

 – do not use NAT – the mode is recommended to be used only when the device is connected to 

ACS server directly, without network addresses modification. In this case, public address coincides 
with local one.

When 

STUN

 mode is selected you should configure the following settings:

STUN Server Address 

– IP address or domain name of STUN server;

STUN Server Port 

– UDP port of STUN server (the value by default is 3478);

Minimum Keep Alive Period, s

and 

Maximum Keep Alive Period, s

 – defines time interval for sending 

messages to STUN server periodically to detect public address changing.

When 

Manual

 mode is selected, client address is set manually in 

NAT Address

 parameter (the address should be 

set in IPv4 format).

Through TR-069, you may implement main configuration of the device, firmware update and reading the data on 
the device (firmware version, model, serial number, etc.), uploading/downloading of configuration file, remote 
reboot (TR-069, TR-098 specifications are supported).
To apply a new configuration and store settings into the non-volatile memory, click the 

'Apply'

 button. To discard 

changes click the 

Cancel

 button.

5.4.9 

The «Advanced» submenu

Use this menu to set reserved VLAN ID, enable UPnP and enable/disable Service Wi-Fi.

UPnP

Summary of Contents for WB-2P-LR5

Page 1: ...IP address 192 168 1 1 Username admin Password password User station WB 2P LR5 User manual Firmware version 2 3 0 ...

Page 2: ...5 mounting 12 3 3 1 Pre tuning 12 3 3 2 Mounting algorithm 12 3 4 Switching on 15 3 5 Wi Fi antenna alignment 15 4 Device management via WEB configurator 16 4 1 Getting started 16 4 2 Changing user 17 4 3 Applying configuration and discarding changes 18 5 Main elements of the WEB interface 19 5 1 The Monitoring menu 20 5 1 1 The Internet submenu 20 5 1 2 The WDS submenu 21 5 1 3 The Ethernet Ports...

Page 3: ...submenu 49 5 3 The IPTV menu 50 5 3 1 The IPTV submenu 50 5 4 The System menu 52 5 4 1 The Time submenu 52 5 4 2 The Access submenu 53 5 4 3 The Log submenu 54 5 4 4 The Passwords submenu 56 5 4 5 The Configuration management submenu 57 5 4 6 The Firmware Upgrade submenu 58 5 4 7 The Reboot submenu 59 5 4 8 The Autoprovisioning submenu 59 5 4 9 The Advanced submenu 61 6 Configuration Example 63 7 ...

Page 4: ...e to speed of wired networks with high criteria for the quality of provided services WB 2P LR5 is a user station designed for connection to Wi Fi access network which might be constructed using base stations within long distances The case of WB 2P LR5 is sealed that is allows to install the device outdoor with different climate conditions This manual specifies intended purpose main technical param...

Page 5: ...s stadiums etc Power to the device is supplied via PoE technology 24V 2 2 Device specification Interfaces LAN 1 port Ethernet RJ 45 10 100 1000BASE T WLAN IEEE 802 11a n ac Service Wi Fi 2 4 GHz 802 11b g n short range interface for adjustment and device setup during the installation period 1 The power is supplied via PoE injector 24V connected to 220V network 1 For WB 2P LR5 rev C Network functio...

Page 6: ... interface support for DHCP based autoprovisioning support for TR 069 remote monitoring configuration and setup SNMP web interface Telnet SSH The figures below illustrate applications schemes of WB 2P LR5 Functional scheme of using WB 2P LR5 without router Functional scheme of using WB 2P LR5 with router ...

Page 7: ...rds 802 11a n ac Frequency range MHz 5180 5825 MHz 5180 6150 MHz for WB 2P LR5 rev B WB 2P LR5 rev C Modulation BPSK QPSK 16QAM 64QAM 256QAM Speed of data transmission Mbps 802 11a up to 54 Mbps 802 11n up to 300 Mbps 802 11ac up to 867 Mbps Maximum output power of the transmitter 5 6 GHz 24 dBm for WB 2P LR5 WB 2P LR5 rev B 28 dBm for WB 2P LR5 rev C Receiver sensitivity 5 6 GHz 94 dBm Security 6...

Page 8: ...e control Web interface Telnet SSH SNMP monitoring TR 069 Access restriction by password General parameters Processor Realtek RTL8197FS 1 GHz RAM 128 MB Flash 32 MB Power supply PoE 24 V Power consumption no more than 8 W range of operation temperatures from 45 to 65 С Operating humidity up to 95 Ingress Protection Marking IP54 Dimensions 80x66x282 mm Weight 0 35 kg ...

Page 9: ...out of WB 2P LR5 is shown in the figure below WB 2P LR5 layout LAN port 10 100 1000Base T RJ 45 connector for local network connection and power supply via PoE a grounding connector for WB 2P LR5 rev C and the button for resetting to factory settings Reset are located on the bottom panel of the device WB 2P LR5 bottom panel elements ...

Page 10: ...eration solid orange the device is loaded but IP address is not received via DHCP solid red the device is loading LAN LAN interface indicator solid green 10 100 Mbps solid orange 1000 Mbps the channel between LAN interface of WB 2P LR5 and connected device is active flashes packet data transmission between LAN interface of WB 2P LR5 and connected device WLAN received signal strength indicator RSSI...

Page 11: ...device is loaded press and hold RST button of the injector approximately 10 15 seconds until Power indicator of WB 2P LR5 is flashing orange Device will be rebooted automatically DHCP client will be launched by default If the address is not received via DHCP the device will have IP address 192 168 1 1 subnet mask 255 255 255 0 User Name Password to access via Web interface admin password 2 7 Deliv...

Page 12: ...pole in the way that the LAN port is pointed down In order to provide better receiving signal level the sectoral antenna of a base station should be in line of sight of WB 2P LR5 You may achive the highest signal level by antenna alignment with the help of RSSI indicators The transmitting part of the device is located on the other side from brackets This area should be directed to base station sec...

Page 13: ...e bottom cover which close LAN port Ground the device through a grounding connector for WB 2P LR 5 rev C 3 Connect Ethernet cable to LAN port 4 Close the bottom cover 5 Connect Ethernet cable connected to WB 2P LR5 to PoE port of injector ...

Page 14: ... LAN port of PoE injector 7 Connect PoE injector to 220V socket with the help of power line cord 8 Align the position of the device for best signal level receiving The level of received signal is shown by the indication located on the back panel of the device 9 Fasten the clamps ...

Page 15: ...g of the connection parameters of the subscriber station WB 2P LR5 with the base station in WEB interface Connect the smartphone to a Wi Fi network using the EltexWiFi SSID Set the following connection settings on the smartphone Static IP address 192 0 2 X netmask 255 255 255 0 gateway 192 0 2 1 Open the browser aand enter the address 192 0 2 1 8080 The alignment tab will be displayed where the si...

Page 16: ...the browser address line If connection is successful request form with user name and password will be displayed on a browser window 3 Enter your username into Login and password into Password field Click the Log in button Device Web configurator home page will be opened in the browser window IP address by default 192 168 1 1 subnet mask 255 255 255 0 The device is capable to obtain an IP address v...

Page 17: ...viewer may only view full device configuration without editing privileges may access full device status monitoring When you click the Logout button the current user session will be terminated login window will be displayed To change the access you should specify the corresponding username and password and click Log in button You may select languages on the top right of the page Russian and English...

Page 18: ... and on Apply button If any parameter value have been set incorrectly the error notification with description will be displayed after pressing Apply button The mark will be displayed next to the tab name and on Apply button The Apply button in the menu Discarding changes The button for discarding changes appears as follows Press Apply to save configuration to flash memory and apply new settings Al...

Page 19: ...sion Menu tabs which contain submenu tabs are divided into categories Network System Submenu tabs manage the settings field below Settings field which is based on the user select The field is dedicated to view device settings and setting configuration data Configuration management buttons the detailed description is given in section Applying configuration and discarding changes Information field T...

Page 20: ...city parameter that reflects the effectiveness of the use of a modulation by the device on the transmission It is calculated based on the number of packets transmitted on each modulation and the reduction factors The maximum value is 100 means that all packets are transmitted at maximum modulation for the maximum nss type supported by the device The minimum value is 2 in the case when the packets ...

Page 21: ...nnel bandwidth used for wireless bridge Network mode the current network mode of the radiointerface WDS MAC address MAC address of the opposite device Client Name network name of the opposite device IP address IP address of the opposite device Link Capacity parameter that reflects the effectiveness of the use of a modulation by the device on the transmission It is calculated based on the number of...

Page 22: ...ge operation TxRate channel data rate of transmission Mbps RxRate channel data rate of receiving Mbps 5 1 3 The Ethernet Ports submenu You can view Ethernet ports state in the Ethernet Ports submenu State Port a port name LAN a local network port Connection port connection state On network device is connected to the port connection is active Off network device is not connected to the port connecti...

Page 23: ...nnected device IP address IP address assigned from adresses pool Lease Expires time range after which the lease of the address expires To obtain current information on DHCP clients press the Refresh button 5 1 5 The ARP submenu You may view ARP table in ARP submenu ARP table contain information on IP and MAC addresses mapping ARP Table IP address device IP address MAC device MAC address Client nam...

Page 24: ...eceived Server Timeout time since the last packet from the server is received You can also see information about the MAC address of the client and server 5 1 7 The PPPoE Client submenu On the page you can see information about the MAC address and the IP address of the client and server The Status parameter displays the session state whether session is active or inactive The PPPoE Relay submenu is ...

Page 25: ...oduct device model name Firmware Version device firmware version Factory MAC Address MAC address of the device s WAN interface defined by the manufacturer Serial number device serial number defined by the manufacture System time current time and date set in the system Uptime time of operation since the last startup or reboot of the device ...

Page 26: ...ns shown in the WEB interface In order to maintain high performance of the WEB interface the maximum number of connections shown is limited to 1024 You may view other connections through the device console Connections List Protocol protocol through which the connection has been established Source Address IP address and port number of the connection initiator Destination destination IP address and ...

Page 27: ...WB 2P LR5 User manual 27 To get current information click the Refresh button ...

Page 28: ... will be added into the routing table in order to exclude redirection of the following packets intended for the same destination M means that the route was modified likely by a dynamic routing protocol running on a local system with the mod parameter applied A means buffered route with corresponding record in the ARP table С means that the route source is the core routing buffer L means that the r...

Page 29: ...twork settings in the Network menu 5 2 1 The Internet submenu In Internet submenu you may configure parameters to connect to a base station via Wi Fi and select connection mode Wi Fi client mode Hostname a name of the network device Device mode a mode of device connection ...

Page 30: ... hexadecimal digits and be of 10 or 26 symbols lenght or it might be a string a z A Z 0 9 _ symbols with lenght of 5 or 13 symbols The mode is hidden in the web interface WPA WPA2 WPA and WPA2 authentication The key lenght is from 8 to 63 symbols Only the following characters can be used a z A Z 0 9 _ or space It is recommended to use WPA and WPA2 encryption modes as the safetest WPA Enterprise WP...

Page 31: ...the device via Wi Fi interface to service provider network Static operation mode where IP address and all the necessary parameters for WAN interface are assigned statically If Static is selected the following parameters will be available to set WAN IP set IP address of WAN interface of the device in service provider network Netmask set subnet mask of device s WAN interface in service provider netw...

Page 32: ...device in service provider network Netmask set subnet mask of device s WAN interface in service provider network Default Gateway address to which a packet will be transmitted in case the route has not been found in the route table Primary DNS Secondary DNS IP address of DNS servers Disable sender address translation available in router mode the option allows you to disable sender address broadcast...

Page 33: ...o the device is enabled Management VLAN ID VLAN identifier which is used to access the device Management 802 1P 802 1P attribute also called CoS Class of Service which is attached to egress IP packets transmitted from this interface The value is from 0 the least priority to 7 the highest priority Management Protocol defines management interface operation mode DHCP operation mode when IP address su...

Page 34: ... required for operation are obtained from DHCP server automatically Static operation mode where IP address and all the necessary parameters for WAN interface are assigned statically If Static is selected the following parameters will be available to set Internet IP set IP address of WAN interface of the device in service provider network Internet Netmask set subnet mask of device s WAN interface i...

Page 35: ...ameters of WAN interface are set statically manually If Static is selected the following parameters will be available to set WAN IP set IP address of WAN interface of the device in service provider network Netmask set subnet mask of device s WAN interface in service provider network Default Gateway address to which a packet will be transmitted in case the route has not been found in the route tabl...

Page 36: ...etwork will be performed Static operation mode where IP address and all the necessary parameters for WAN interface are assigned statically If Static is selected the following parameters will be available to set WAN IP set IP address of WAN interface of the device in service provider network Netmask set subnet mask of device s WAN interface in service provider network Default Gateway address to whi...

Page 37: ...P address of DNS servers VLAN Trunk if checked the trunk port is activated There is an opportunity to use Management VLAN Use Management VLAN when checked VLAN used for access to the device is enabled Management VLAN ID VLAN identifier which is used to access the device Management 802 1P 802 1P attribute also called CoS Class of Service which is attached to egress packets transmitted from this int...

Page 38: ...the flag is checked all traffic data and management packets will be transmitted on the specified center channel frequency with a given bandwidth 40 or 80 MHz The function is proprietary the transmission is not carried out according to IEEE 802 11 standards where it is supposed to use different center frequencies for data and management traffic with 40 80 MHz bandwidth Tx Power dBm transmitting Wi ...

Page 39: ...ms beacon frames transmission period The frames are sent to detect access points The parameter takes values from 20 to 2000 ms by default 100 ms Aggregation enable support for AMPDU AMSDU Short Guard interval support for shortened guard interval 400 ns interval is used instead of 800 ns STBC Soace Time Block Coding method dedicated to improve data transmission reliability When checked the device t...

Page 40: ...to assign IP addresses and other parameters required to the Internet access to computers connected to LAN interface through DHCP Dynamic Host Configuration Protocol The use of DHCP allows to avoid manual configuration of TCP IP LAN IP address IP address of the device in a local network Netmask subnetmask in local network LAN settings are available only in router mode ...

Page 41: ...dress specify a static MAC address It is assigned in XX XX XX XX XX XX format IP address set static IP address for the specified MAC address Configuring of static leases is helpful when you need that the certain computer always obtains certain IP address Press Apply to add IP address to the list of static IP addresses for DHCP server To discard changes click the Cancel button To delete an address ...

Page 42: ...latile memory press Apply Press Cancel to discard the changes 5 2 5 The Local DNS submenu You may configure local DNS server of the device by adding IP address and domain name in the Local DNS submenu Local DNS allows to obtain an IP address of the device using its domain name host in case of lack of DNS server in a network segment To implemet this you should know concordances between nodes names ...

Page 43: ...esses and network ports of IP packets Port forwarding is necessary when TCP UDP connection with local PC connected to LAN interface is established via external network The settings menu allows to set rules which permit packets transmission from external network to specified address in a local network i e to establish connection Port forwarding is also necessary when using torrent and p2p services ...

Page 44: ... address in external network which will be under the rule Destination Ports of WAN destination TCP UDP ports in external network packets from which will follow the rule you may assign either single port or range of ports using dash Port forwarding rule will work as follows a packet received via Protocol on a port defined in Destination Ports of WAN field and having source address defined in WAN IP...

Page 45: ...ype of ICMP message Firewall rules configuration To add a new NAT rule click Add button and fill in the following fields in the Add a new rule window Name rule name Traffic Type select traffic type for which you create the rule Input incoming traffic the receiver is one of the network interfaces of the device If the parameter is selected the following field will be displayed Source IP address a so...

Page 46: ...MP any Action an action for packets to undergo accept drop When TCP UDP TCP UDP protocols are selected the following settings will be available to configure Source ports the list of source ports packets from which will follow the rule it is acceptable to specify single port or range of ports using the dash sign To specify all the source ports enter 0 65535 Destination ports the list of destination...

Page 47: ...tion host or subnet IP address to which the route will be set Netmask a subnet mask A subnet mask for a host is set to 255 255 255 255 value for a subnet depending on its size Gateway IP address of the gateway through which the device may access Destination To apply a new configuration and store settings into the non volatile memory click the Apply button To discard changes click Cancel button ...

Page 48: ...ver Enable D DNS when checked D DNS service is enabled The following field are available Server D DNS provider name select one of the available providers User Name a user name for access to D DNS service account Password a password for access to D DNS service account Domain name 0 9 you may register up to 10 domain names usually only one is required The update of data on IP address of the device i...

Page 49: ...in name of SNMPv2 trap messages receiver in HOST COMMUNITY PORT format InformSink an IP address or domain name of Inform messages receiver in HOST COMMUNITY PORT format System Name device name Contact the manufacturer contact Location information on the device location Trap Community a password which is contained in traps by default trap The list of objects which are supported for reading and conf...

Page 50: ...ith data on the list of active IPTV channels are periodically transmitted to a higher server which implements IPTV signals translation Enabling of the function is necessary if a higher server disables IPTV channels translation in a certain period of time Renew Subscription Interval s a period of messages transmission with data on active IPTV channels list specified in seconds Set the value of inte...

Page 51: ...i Fi channel HTTP Port a number of HTTP Proxy port from which video stream will be translated Use this port to connect IPTV streams translated by the device For instance if the device has the 192 168 0 1 address on the LAN interface Proxy server s value is 1234 and you need to playback 227 50 50 100 channel broadcasted to UDP port 1234 set stream address for VLC programm in the form of http 192 16...

Page 52: ...egion Daylight Saving Time Enable when selected automatic daylight saving change will be performed automatically within the defined time period DST Start daylight saving change starting day and time DST End daylight saving change ending day and time DST Offset minutes time shift in minutes Enable NTP check to enable device system time synchronization with the particular NTP server NTP Server time ...

Page 53: ...B intervace via SSH default is 22 You may use Telnet and SSH protocols in order to access the command line Linux console Access to Internet service This section allows or denies access to the device with separate rules for local and external networks router mode For this you need to set the following permissions Web HTTP when checked connection to the device web configurator through WAN port via H...

Page 54: ...eshooting Debug information may be provided by the following device firmware modules Networkd Log deals with the device configuration according to the configuration file Configd Log deals with the configuration file operations config file reads and writes from various sources and the device monitoring data collection Networkd Log Log output log messages output direction Disabled the output is disa...

Page 55: ...least a single log Networkd Log or Configd Log configured for Syslog output you should enable Syslog agent that will intercept debug messages and send them to a remote server or save them to a local file in Syslog format Enable when selected user Syslog agent is launched Mode Syslog agent operation mode Server log information will be sent to a remote Syslog server Local file log information will b...

Page 56: ... any settings full device status monitoring A viewer password by default viewer has rights to view configuration and device monitoring data Viewer is not permitted to change settings Administrator password enter administrator password in the corresponding field and confirm it Viewer password enter user password in the corresponding field and confirm it To apply a new configuration and store settin...

Page 57: ...tion will be applied automatically and does not require device reboot To change the passwords open the configuration file in text editor and change passwords Then save the changes in configuration archive The example of password changing is shown below Passwords AdminPassword encrypted 7C607178736B7465 ViewerPassword encrypted 7A68677C6176 changes to Passwords AdminPassword password ViewerPassword...

Page 58: ...ot be set as a backup You may update the device firmware manually by downloading the firmware file from the web site https eltex co ru support downloads and saving it on the computer To do this click the Select file button in the Firmware update file field and specify path to firmware in the tar gz format file To start the update process you must click the Upload file button The process may take s...

Page 59: ...ice Click the Reboot button to reboot the device Device reboot process takes approximately 1 minute to complete 5 4 8 The Autoprovisioning submenu In the Autoprovisioning submenu you may configure DHCP based autoprovisioning algorithm and subscriber device automatic configuration protocol TR 069 ...

Page 60: ...ation is periodically updated If 0 is set update of the device will be implemented once right after reloading of the device Firmware File full path to firmware file set in URL format there is an opportunity to load configuration files via TFTP and HTTP tftp server address full path to firmware file http server address full path to firmware file where server address HTTP or TFTP server address doma...

Page 61: ...d to be used only when the device is connected to ACS server directly without network addresses modification In this case public address coincides with local one When STUN mode is selected you should configure the following settings STUN Server Address IP address or domain name of STUN server STUN Server Port UDP port of STUN server the value by default is 3478 Minimum Keep Alive Period sand Maxim...

Page 62: ... antenna alignment With Service Wi Fi enabled a Wi Fi client can connect to the device via an open network with the EltexWiFi SSID 2 4 GHz frequency band Wi Fi enabled when the Service Wi Fi flag is on otherwise it is disabled Service Wi Fi is enabled by default Configuration via HTTP HTTPS when checked configuration via Service Wi Fi is enabled Configuration via HTTP HTTPS is disabled by default ...

Page 63: ... browser 192 168 1 1 by default if address was not obtain via DHCP When connection is established successfully the window with Login and password fields will be displayed Fill the filds and press Log in By default login admin password password If the window is not displayed make sure that the PC and the device are in the same network ...

Page 64: ...gure conection to a base station Specify SSID of the wireless network you want to connect to in the corresponding field Select security mode through which authentication in the selected wireless network is implemented and specify the key if using an encrypted network After clicking on the Apply button the subscriber station will search for the specified SSID on the air and upon detection will atte...

Page 65: ...splayed in the console root WB 2P LR5 spectrum analyzer Spectrum analyzer scanning in progress root WB 2P LR5 root WB 2P LR5 spectrum analyzer result start dump config node Monitoring Network SpectrumAnalyzer name 36 value 5 name 37 value 5 name 38 value 0 name 39 value 3 name 40 value 1 name 41 value 3 name 42 value 0 name 43 value 3 name 44 value 3 name 45 value 3 name 46 value 0 name 47 value 4...

Page 66: ...iles from the server HTTP and TFTP are supported server address address of the server with a file to be downloaded domain name or IPv4 path to file path to file on the server You may use the following macro in URL reserved words substituted with the specific values MA MAC address the macro is substituted with device s MAC address in file URL SN Serial number the macro is substituted with device s ...

Page 67: ... If DHCP options value is selected configuration file and firmware file URLs will be extracted from DHCP Option 43 Vendor specific info or 66 TFTP server and 67 Boot file name thus address obtaining via DHCP should be enabled for the Internet service DHCP option format and analysis will be provided below If URL parameters are not provided by DHCP options default parameters values will be used For ...

Page 68: ...tion file should be in tar gz format this format is used when configuration is saved from the web interface in the System Configuration management tab Configuration downloaded from the server will be applied automatically and does not require device reboot Special aspects of firmware updates Firmware file should be in tar gz format When the firmware file is loaded the device unpacks it and checks ...

Page 69: ... linux bin file from the unpacked software archive for transfer Launch the command to transmit the file to remote host Put command The process of file transmission will be launched If the transmission has started please wait for finishing The device will write the firmware to its memory and launch the system automatically The time of writing takes approximately 8 minutes If the process is complete...

Page 70: ...8 0 250 user script script sh In this case after the device started file script sh which is kept in the catalogue having 192 168 0 250 address will be automatically loaded via HTTP from the defined server Then it will be launched Launch from TFTP server To launch a script from TFTP server enter the entire path to the file in TFTP URL format to URL parameter URL tftp 192 168 0 250 user script scrip...

Page 71: ...User manual 71 11 Appendix B Antenna Patterns The pattern of vertically polarized antenna in H plane The pattern of vertically polarized antenna in E plane The pattern of horizontally polarized antenna in H plane ...

Page 72: ...WB 2P LR5 User manual 72 The pattern of horizontally polarized antenna in E plane ...

Page 73: ...nu The LAN submenu The Network SNMP menu The Monitoring menu The PPPoE Relay submenu Version 3 0 28 06 2019 Synchronization with firmware version 2 2 0 Added Wi Fi antenna alignment Version 2 0 31 10 2018 Added 4 5 3 Wireless bridge 4 6 4 WDS submenu 4 6 5 Radiointerface submenu 4 7 2 WDS submenu Changes in chapters 2 2 Device specifications 4 6 3 Internet submenu 4 6 7 MAC addresses confinuration...

Page 74: ...630020 Novosibirsk 29 Okruzhnaya Str Phone 7 383 274 47 87 7 383 272 83 31 E mail techsupp eltex co ru You are welcome to visit Eltex official website to get the relevant technical documentation and software to use our knowledge base or consult a Service Centre Specialist in our technical forum http www eltex co ru en http www eltex co ru en support downloads ...

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