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WBSn-2400 and WBSn-2450 System Manual

Appendix A - TroubleshootingBase Station LEDs Description

Appendix A - Troubleshooting

Base Station LEDs Description

111

A.1

Base Station LEDs Description

Table A-1: Base Station LEDs Description

LED

Description

Status

Off: No power or start of reboot.

Red: Reboot in progress.

Blinking Green: Systen Initialization.

Solid Green: Normal operation.

Orange: Rescue mode is running (see

“Restarting the Unit in

Rescue Mode” on page 112

Wireless

Applicable only during normal operation (Status LED is green).

Off: No radio is on.

Orange: Only one radio is on

Green: Both radios are on

Ethernet

Off: No Ethernet activity.

Blinking Green: Ethernet activity indication.

Содержание 43222600

Страница 1: ...System Manual WBSn 2400 and WBSn 2450 Software Version 2 0 June 2015 P N 216066...

Страница 2: ...y a Alvarion warrants that the Product hardware it supplies and the tangible media on which any software is installed under normal use and conditions will be free from significant defects in materials...

Страница 3: ...AR PURPOSE SATISFACTORY QUALITY CORRESPONDENCE WITH DESCRIPTION NON INFRINGEMENT AND ACCURACY OF INFORMATION GENERATED ALL OF WHICH ARE EXPRESSLY DISCLAIMED ALVARION WARRANTIES HEREIN RUN ONLY TO PURC...

Страница 4: ...ed radio or TV technician for help FCC and Industry Canada Radiation Hazard Warning To comply with Industry Canada exposure requirements and FCC RF exposure requirements in Section 1 1307 and 2 1091 o...

Страница 5: ...ulation and national codes it is highly recommended to ensure that the outdoor units are grounded and suitable lightning protection devices are used so as to provide protection against voltage surges...

Страница 6: ...wise noted Alvarion Technologies Ltd reserves the right to alter the equipment specifications and descriptions in this publication without prior notice No part of this publication shall be deemed to b...

Страница 7: ...cribes the WBSn 2400 and WBSn 2450 system and its components and provides details on the new features and main modifications introduced in this release Chapter 2 Base Station Installation Describes ho...

Страница 8: ...7 2 1 Installation Requirements 8 2 1 1 Packing List 8 2 1 2 Additional Installation Requirements 8 2 1 3 Optional Accessories 9 2 2 Location Selection Guidelines 9 2 3 Safety Instructions and Informa...

Страница 9: ...3 1 2 Using the Element Management System 22 3 2 Status 26 3 2 1 Status Overview Page 26 3 2 2 Routes Page 33 3 2 3 System Log Page 34 3 2 4 Realtime Graphs Pages 34 3 2 5 Hotspot Users Page 38 3 3 S...

Страница 10: ...Load Page 107 3 7 5 Memory Page 107 3 7 6 Activity Pages 108 3 7 7 TCP Connections Pages 109 Appendix A Troubleshooting 110 A 1 Base Station LEDs Description 111 A 2 Using the Reset Button of the Base...

Страница 11: ...Chapter 1 Introduction In This Chapter WBSn System Description on page 2 Specifications on page 3...

Страница 12: ...ironments security and QoS features FCAPS management suite and simple and easy installation WBSn base stations include rich embedded networking capabilities including Bridging Routing and a fully inte...

Страница 13: ...streams 2 2 2 802 11g OFDM 802 11b DSSS 802 11n All models excluding WBSn 2450 SHD 3x3 MIMO with 3 spatial data streams 3 3 3 WBSn 2450 SHD 2x2 MIMO with 2 spatial data streams 2 2 2 802 11a OFDM Dat...

Страница 14: ...S 3 kg excluding antennas WBSn 2450 SO 3 2 kg excluding antennas WBSn 2450 S WBSn 2450 SHD 3 2 kg Input Power 55 VDC Power over Gigabit Ethernet use only PoE injector supplied by Alvarion Power Consum...

Страница 15: ...SA C22 2 No 60950 1 CAN CSA C22 2 No 60950 22 EN IEC 60950 1 EN IEC 60950 22 Environmental ETSI EN 300 019 2 2 ETSI EN 300 019 2 4 V2 1 2 IEC 60068 2 64 29 IP68 IEC 60529 Radio FCC 47 CFR part 15C EN...

Страница 16: ...PI AC 1G Power over 1Gbps Ethernet Injector with TVS transient voltage suppressing protection Input 90 264VAC output 56VDC max 60 Watt Indoor environment only 0 40 C operating temperature Power cable...

Страница 17: ...nting the Base Station on page 15 Completing the Outdoor Installation on page 17 Connecting the Indoor Equipment on page 18 Verification on page 19 CAUTION ONLY experienced installation professionals...

Страница 18: ...rs available from Alvarion refer to Power over Ethernet Injectors optional on page 6 Data and Power Ethernet cable Outdoor Category 5e 4 pair shielded data cable two shielded RJ45 connectors and tools...

Страница 19: ...and whether extenders are required The front panel of a base station with sector antenna s WBSn 2400 S WBSn 2450 S WBSn 2450 OS WBSn 2450 SO and WBSn 2450 SHD should be directed towards the area inten...

Страница 20: ...back with sector antennas is 2 meters For units with Omni antennas he minimum horizontal separation distance between two base stations back to back is 10 meters 2 3 Safety Instructions and Information...

Страница 21: ...to the base station refer to Preparing and Connecting the Grounding Cable on page 13 5 If an extender is required attach it to the post clamp refer to Attaching an Extender to the Post Clamp optional...

Страница 22: ...thernet connector to the cable and connect it to the base station prior to mounting the outdoor unit Typically the connector on the other side will be attached only after completing the outdoor instal...

Страница 23: ...ng cases A wall or horizontal pole installation where adjustment of the direction in the horizontal plan is required for directing the base station towards the required coverage area The extender may...

Страница 24: ...rs 1 Attach the horizontal adjustment part of the extender to the post clamp with 2 screws and washers using a 13 mm ratchet key with a torque of 18 4 lb ft 25 Nm 2 Attach the vertical adjustment part...

Страница 25: ...lamp should be installed horizontally with the two protrusions pointing sideways The slots support installation on poles with different diameters 1 6 on either vertical or horizontal poles The holes e...

Страница 26: ...ure the post clamp to the pole by closing and tightening the steel bands with a torque of 3 8 lb ft 5 1 Nm As you tighten the screws verify that the direction is correct for the coverage area required...

Страница 27: ...door Installation 1 Firmly connect the grounding cable to a protective ground earth connection 2 Route the Ethernet cable to the intended location of the PoE Injector Use proper means to secure the ca...

Страница 28: ...ns on how to prepare the Ethernet cable refer to Preparing the Base Station s Ethernet Cable on page 116 2 Connect the Ethernet cable to the OUT connector of the PoE Injector 3 Use the power cable to...

Страница 29: ...ion 19 2 13 Verification Disconnect the PC from the IN port of the PoE Injector and connect the IN port to the networking equipment that should be configured to provide connectivity from the control c...

Страница 30: ...Station Management In This Chapter Using the Web Based Element Management System on page 21 Status on page 26 System on page 40 Services on page 53 Network on page 61 APController on page 101 Statisti...

Страница 31: ...of the management utility is displayed NOTE The default method of setting the unit s IP parameters is DHCP client meaning that IP parameters should be obtained automatically from a DHCP server When IP...

Страница 32: ...eneral information section at the top right corner of the window includes The version number of the currently running firmware Hostname the name defined for the unit and User the Username of the logge...

Страница 33: ...en the page for the first second level tab Third level tabs are available for certain second level tabs 3 1 2 3 Work Area The work area displays the relevant parameters according to the selection in t...

Страница 34: ...t entry To remove an entry from the list click on the x sign on the right side of the entry the first entry cannot be removed it can only be cleared NOTE The options value range available for certain...

Страница 35: ...d changes will be lost Existence of such changes are indicated in the Unapplied Changes message in top right corner of the page Changes that were not saved will be cleared upon switching to a differen...

Страница 36: ...hs of certain performance indicators 3 2 1 Status Overview Page To access the Status Overview page click on the Status tab in the management function selection panel The Status Overview page comprises...

Страница 37: ...nds On the right of this section there is a vertical bar showing the current received signal strength at the antennas The color of the vertical bar indicates the relative quality 3 2 1 2 Mesh The Mesh...

Страница 38: ...mbers for the Main Bank firmware and Shadow Bank firmware files An asterisk sign indicates the firmware file currently used as the running version Rescue Version The version number of the rescue mode...

Страница 39: ...ice s model Product Serial The device s serial number Main Board Part Name The model of the device s main board Main Board Serial The serial number of the device s main board 3 2 1 5 Network The Netwo...

Страница 40: ...interface name provide indication regarding the Ethernet and wireless networks associated with the network The Ethernet icon provides a visible indication on the total number of Ethernet interfaces a...

Страница 41: ...ncryption The wireless encryption mode being used for the wireless network Not applicable for a Mesh Monitoring wireless network ACK Timeout Shows the maximum acknowledgment time in microseconds deriv...

Страница 42: ...of the station Last IP States the most recent IP address of the station as seen by the AP Signal The current total strength in dBm of the signal received from the station Signal Chains The current str...

Страница 43: ...ress The IP address assigned to the device MAC Address The device s MAC address Leasetime Remaining The remaining lease time 3 2 2 Routes Page To access the Routes page click on the Status Routes tab...

Страница 44: ...teway and Metric for each active subnet 3 2 3 System Log Page To access the Status System Log page click on the Status System Log tab in the management function selection panel The System Log page dis...

Страница 45: ...s are displayed Average and Peak values are calculated for the elapsed time since starting to display the graph Labels for colors of displayed graphs are provided as underlines for the applicable item...

Страница 46: ...e for each of the available physical and logical interfaces For each interface the Realtime Traffic graphs display the realtime Inbound and Outbound traffic in bits s and in bytes s 3 2 4 3 Wireless P...

Страница 47: ...networks For each wireless network there are two types of real time graphs Signal and Noise Graph Display the realtime Signal and Noise levels in dBm Tx CCQ Graph Display the realtime Tx CCQ the tran...

Страница 48: ...ion below the graph there is a table providing the following details for each connection Network Internet Protocol Protocol Type of protocol UDP TCP ICMP or UNKNOWN Source Source address and port Dest...

Страница 49: ...able MAC Address IP Address Username Online Time Total amount of time used by the user in the current session Downloaded Total amount of data downloaded by the user in the current session Uploaded Tot...

Страница 50: ...n provides access to the following pages System Page Administration Page Services Page SNMP Page Backup Flash Firmware Page Reboot Page Diagnostics Page 3 3 1 System Page To access the System page cli...

Страница 51: ...3 1 1 1 General Settings The General Settings tab includes the following Local Time The current read only date and time of the unit s real time clock To synchronize with the date and time of your PC...

Страница 52: ...cal to or higher than the specified level will be transferred The levels available in the drop down list are Debug Info Notice Warning Error Critical Alert Emergency The default is Warning Log level T...

Страница 53: ...addresses of NTP servers or servers pools By default 4 popular servers pools 0 pool ntp org 1 pool ntp org 2 pool ntp org 3 pool ntp org are configured The time provided by a time server is always UT...

Страница 54: ...n in the Confirmation text field You can click on the Reveal hide password icon on the right side of each field to hide the default or reveal the typed string 3 3 2 2 Web Web Server Mode This can be s...

Страница 55: ...s to the given IP address will fail The Ping Watchdog section includes the following parameters Enable Ping Watchdog Select to enable the Ping Watchdog service The default is disabled de selected IP A...

Страница 56: ...disabled de selected Mode Chooses the Auto Reboot mode By Time of day or By Number of Hours Time HH MM 24 Hours Available only if selected Mode is By Time Sets the time of day to reboot Number of Hour...

Страница 57: ...em contact sysContact string Location The system location sysLocation string 3 3 4 2 SNMP Configuration The following tabs are available in the SNMP Configuration section General Settings Trap 3 3 4 2...

Страница 58: ...tring SNMP V3 Privacy Algorithm Read only The data encryption algorithm used e g DES SNMP V3 Privacy Password The password for data encryption default password You can click on the Reveal hide passwor...

Страница 59: ...file Click on the Generate archive button The backup file will be downloaded to your PC either to the Downloads directory or to a selectable location depending on the browser used The default file na...

Страница 60: ...e Browse button and navigate to the location of the required firmware file 3 The path to the selected file will be displayed next to the Browse button 4 Click on the Flash firmware button You will be...

Страница 61: ...the new configuration file excluding parameters that are not supported by the previous firmware click on the Switch Bank button After reboot the device will run using the previous firmware and the ne...

Страница 62: ...agnostics tab in the management function selection panel The Diagnostics page enables preparing diagnostics compressed TAR files tar gz that may be sent to the support team of the supplier for advice...

Страница 63: ...ntain guidelines on how to configure the device to implement hotspot services It is recommended to configure the LAN Wifi and WAN then test it before enabling the hotspot setting WAN LAN Interfaces Wi...

Страница 64: ...ernet connection is working fine 3 4 1 1 4 Setting up the Hotspot The hotspot can now be set up and enabled The following sections describe the Hotspot settings available in the AP s web pages 3 4 1 2...

Страница 65: ...e password icon on the right side to hide the default or reveal the typed string Login Page Title Sets the title shown on the Login Page e g HotSpot Idle Timeout The timeout in seconds before disconne...

Страница 66: ...default address and netmask prefix are derived from the network address of the LAN interface DNS Server 1 and DNS Server 2 The default for both is the management IP address of the AP 3 4 1 4 Hotspot...

Страница 67: ...n the management function selection panel Here you can set the Universal Access Method UAM parameters UAM Server Sets the URL of the web server to use for authenticating clients The default http 1 0 0...

Страница 68: ...th servers included in the Walled Garden Domain list see above will be available to the Hotspot user before they authenticate Each entry in the list is an IP Address The list must include the IP addre...

Страница 69: ...one default entry that cannot be either deleted or modified User s MAC Address All Others DL Speed kbits s 5000 UL Speed kbits s 5000 This means that all hotspot users are subjected to 5000 kbits s ba...

Страница 70: ...Base Station Management Services 60 3 4 2 Discovery Page To access the Discovery page click on the Services Discovery tab in the management function selection panel Enable Select Enable the default to...

Страница 71: ...ing Interfaces Pages Wifi Pages VLANs Page Local DNS Page Diagnostics Page Passpoint Pages 3 5 1 Interfaces Pages The Network Interfaces option provides access to the following Interfaces Page Per Int...

Страница 72: ...ovides a visible indication on the total number of Ethernet interfaces assigned to any network In addition to eth0 assigned to either the LAN or the WAN zone an Ethernet interface named eth0 VLAN_ID i...

Страница 73: ...s parameters of the LAN zone WAN page In the WAN page you can view configure various parameters of the WAN zone if applicable If VLANs are defined in the device see VLANs Page on page 85 a VLAN config...

Страница 74: ...back IP parameters see Fallback IP on page 69 are configured properly applicable for the default DHCP client option for the Protocol parameter c In the Physical Settings tab select the Ethernet Adapte...

Страница 75: ...parameters see Fallback IP on page 69 are configured properly d Click on the Save button 2 In the Common Configuration section of the WAN page select the Physical Settings tab In the Physical Settings...

Страница 76: ...mbers for Bytes and Packets transmitted on this interface since it became active IPv4 the IP address of the interface Management Interface This parameter indicates whether the interface is configured...

Страница 77: ...l parameters available when Protocol is set to Static address mode are IPv4 address IPv4 netmask IPv4 gateway The default gateway for the device Applicable only for the interface configured as the man...

Страница 78: ...tings tab includes the following components Use broadcast flag Available only when Protocol is set to DHCP client mode When sending DHCP requests a client can indicate if it wants an answer in a unica...

Страница 79: ...WAN interface enabling to select the physical interface to be assigned to the WAN zone For more details refer to Switching from Bridge Mode to Router Mode and Vice Versa on page 64 3 5 1 2 4 Fallback...

Страница 80: ...is available only in the LAN page when a static address is configured for the interface Protocol is set to Static address In the default configuration only a single parameter is available in the DHCP...

Страница 81: ...ond to DHCP requests on this network even if another DHCP server is detected The default is unchecked meaning that if another DHCP server is detected the built in DHCP server will not respond to DHCP...

Страница 82: ...s MAC address use the format xx xx xx xx xx xx IPv4 Address The static IP address to be assigned to the device 3 5 2 Wifi Pages Click on the Wifi option to open the Wifi Wireless Overview Page In addi...

Страница 83: ...n Details General Radio Status Details Per Wireless Network Configuration Details General Radio Buttons Per Wireless Network Buttons 3 5 2 1 1 1 General Radio Configuration Details Channel Country Tx...

Страница 84: ...device has been occupied receiving non valid data i e interfering traffic during the last 10 seconds 3 5 2 1 1 3 Per Wireless Network Configuration Details SSID or Mesh ID SSID is applicable when the...

Страница 85: ...lt values for Interface Configuration parameter see Interface Configuration on page 79 will be added Up to 6 wireless networks may be created per radio ACS Click to display the Radio Channel Scan Repo...

Страница 86: ...ton to run the interference analyzer and automatically switch to the best channel after completion of the task 3 5 2 1 1 5 Per Wireless Network Buttons The following buttons are available for each con...

Страница 87: ...ission quality in a higher percentage means a better wireless connection quality 3 5 2 2 Wireless Network Page A Wireless Network page is available for each configured wireless network The page title...

Страница 88: ...tatus click on the Disable Enable button Regulatory Domain The regulatory domain to be used The regulatory domain together with the Country parameter affects certain parameters such as available chann...

Страница 89: ...upport also low rate IEEE 802 11b clients Coverage 11bgn or not Coverage 11gn High Density mode provides optimization for serving a maximum number of clients in a crowded area located at a relatively...

Страница 90: ...ier ESSID of the wireless network A string of up to 32 characters This is used also as the name for the wireless network SSID For a newly added wireless network the default ESSID is AP where is the se...

Страница 91: ...ot AP mode One additional wireless network the second wireless network in the radio operating in Mesh Monitoring mode used for the batman adv protocol For Root AP Router Client Two additional wireless...

Страница 92: ...2 PSK Mixed Mode IEEE802 1X WPA EAP IEEE802 1X WPA2 EAP No Encryption No authentication no encryption of over the air information This is the default mode that should typically be used for testing pur...

Страница 93: ...client devices that do not support WPA2 with AES encryption These options are no longer supported for client using the IEEE 802 11n standard For WPA PSK WPA2 PSK WPA PSK WPA2 PSK Mixed Mode encryptio...

Страница 94: ...see Passpoint Page on page 91 3 5 2 2 2 3 MAC Filter MAC Address Filter The options are Disable the default Allow listed only and Deny all except listed A MAC access list is a group of client MAC add...

Страница 95: ...nables manually adding a MAC address to the list using the format xx xx xx xx xx xx or for clearing the entry 3 5 2 2 2 4 Advanced Settings The parameters available in the Advanced Settings tab are St...

Страница 96: ...a new VLAN forwarding rule click on the Add button to add a new entry and configure the following parameters VLAN ID The VLAN ID from 2 to 4094 Priority The 802 1p based Priority Code Point applied to...

Страница 97: ...fied VID and vice versa Description A text box enabling to configure a description for the VLAN ID forwarding rule Note the following configuration rules A wireless network can be assigned as untagged...

Страница 98: ...on your network plus the custom option The custom option enables manually adding an IP address to the list Select the appropriate IP address or enter it manually 3 5 5 Diagnostics Page To access the...

Страница 99: ...route path and measuring transit delays of packets across an Internet Protocol IP network 1 Enter the destination IP address or host name in the text field 2 Click on the Traceroute button The test r...

Страница 100: ...e enter their authentication credentials Passpoint automates that entire process enabling a seamless connection between hotspot networks and mobile devices all while delivering the highest WPA2 securi...

Страница 101: ...rofile For details on enabling Passpoint and selecting profiles to be used on a specific wireless network refer to Passpoint Parameters on page 84 3 5 6 2 Profile Pages To access a Profile from 1 to 4...

Страница 102: ...ea The SP Service Provider networks reachable at any one AP is reachable from all the APs configured with the same HESSID The HESSID a globally unique identifier is used to give a single identifier fo...

Страница 103: ...network the default The network is accessible to anyone and no charges apply for the network use An example of this access network type is an airport hotspot or municipal network providing free servi...

Страница 104: ...and if this is the preferred band and it is available For details on available operating class indications refer to Table E 4 Global operating classes in IEEE 802 11 2012 Annex E The default list incl...

Страница 105: ...server side authentication only 3 5 6 2 4 Service Provider Information The Service Provider Information section includes a list of Roaming Consortiums and Service Providers that are roaming partners o...

Страница 106: ...e domain names of the entity operating the hotspot network It is possible that a Hotspot Operator might have more than one domain name that it uses to identify itself 3 5 6 2 7 Provider Authentication...

Страница 107: ...tication Type is http https redirect The URL to which the user will be redirected for authentication 3 5 6 2 8 Venue Configuration The Venue Configuration section provides optional general information...

Страница 108: ...o support Icon Request Response exchange between the device and the AP when the mobile device is configured to display the OSU Icon To add an OSU Icon enter it s name in the text box on the left side...

Страница 109: ...provided human languages the best choice to display to the user Online SignUp NAI Network Access Identifier NAI realm s that can be used by the OSU Provider see also NAI Realm information on page 94 O...

Страница 110: ...r association Double NATed private IPv4 address available Access to a single core network is provided and the combination of the hotspot network and the core network allocates a double NAT IPv4 addres...

Страница 111: ...status for a certain combination of IP protocol and destination port number The Connection Capability parameters are Protocol The IP protocol The options available in the drop down list are ICMP Inte...

Страница 112: ...nnel protection against malicious data insertion The APController tab provides access to the following second level management function tabs AP Controller Page SNMPv3 AP to APC Page 3 6 1 AP Controlle...

Страница 113: ...he controller IP addresses could be more than one address e g a backup server under option 43 using TLV blocks defined in this way Type 0x33 Hex 51 Decimal Length A count of the characters of the ASCI...

Страница 114: ...ight side of the text field to hide the default or reveal the typed string Privacy Password The password used for encrypting the SNMP traffic using the CBC DES protocol A string of at least 8 characte...

Страница 115: ...raph s for the selected time span The Average Avg and Last values for each of the relevant performance parameters are displayed below the graph excluding Interfaces graphs in which calculated Totals f...

Страница 116: ...enables viewing Wireless page as well as the following pages Associations Page Radio Page The Wireless page includes all the graphs available in both the Associations and Radio pages 3 7 2 1 Associati...

Страница 117: ...transmitted TX Packets PHY error graph displaying for each of the supported radios the total number of packets received with a PHY error as percentage of total received packets Retransmissions graph d...

Страница 118: ...ys the following performance parameters on the relevant interface in Bits second Bits TX Bits RX Packets The Packets graph displays the following performance parameters on the relevant interface in Pa...

Страница 119: ...109 3 7 4 System Load Page The System Load page provides a graph displaying the CPU load parameters 1 Minute 5 Minutes and 15 Minutes 3 7 5 Memory Page The Memory page provides a graph displaying memo...

Страница 120: ...phs for each of the supported radios Noise Level graph displaying the Average and Current Noise Levels in dBm on the radio Activity graph displaying the percentage of time consumed by the following ac...

Страница 121: ...atistics 111 3 7 7 TCP Connections Pages The TCP Connection provides graphs displaying the number of TCP connections in various states Graphs are provided for port 80 HTTP and port 22 SSH You can elec...

Страница 122: ...Appendix A Troubleshooting In this Appendix Base Station LEDs Description on page 111 Using the Reset Button of the Base Station on page 112...

Страница 123: ...cription Status Off No power or start of reboot Red Reboot in progress Blinking Green Systen Initialization Solid Green Normal operation Orange Rescue mode is running see Restarting the Unit in Rescue...

Страница 124: ...at least 20 seconds but less than 40 seconds The unit will reset and restart using the factory default configuration including management IP parameters A 2 3 Restarting the Unit in Rescue Mode Rescue...

Страница 125: ...ing the current configuration 1 Click on the Choose File button and navigate to the location of the appropriate dlv file should be a firmware file known to be good and select it The name to the select...

Страница 126: ...eration is not resumed after uploading a good firmware file then most probably there is a configuration problem Click on the Default Configuration button After a few minutes the unit should restart us...

Страница 127: ...Appendix B Preparing Ethernet Cables In this Appendix Preparing the Base Station s Ethernet Cable on page 116...

Страница 128: ...Ethernet cable through the nut and rubber bushing NOTE Use only Category 5e or higher outdoors Ethernet cable Use only shielded RJ 45 8 pin modular plugs Make sure that the length of the Ethernet cabl...

Страница 129: ...sure a good shielding connection solder the shield wire to the connector s shield after crimping 6 Connect the cable to the Ethernet connector 7 Firmly push the rubber bushing back into place inside t...

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