3Com 3CRWE920G73 Network Router User Manual
Contents
1. 2 Align the T rail grips with the ceiling T rail and adjust them so that they grip the T rails securely 3 Tighten the screws on each T rail grip After installation there may be some play in the fit of the T rail grips if the T rails are very narrow If necessary add a shim to achieve a secure grip Connect the antenna 1 Connect one end of the antenna cable to the antenna 2 Connect the free end of the antenna cable to the connection on the bridge Follow the instructions that come with the antenna and follow these general guidelines For best performance place the antenna using the mounting hardware provided with the antenna Outdoor placement is especially important if the building is of metal construction or has metal siding If necessary you can mount an antenna inside a building however indoor placement reduces the antenna s effective range To ensure the physical safety of anyone near the antenna and to prevent damage to the bridge follow the building codes for antenna installations in your area Position the antenna so that there are minimal obstacles between it and any other antenna with which it will communicate While maintaining a direct line of sight between antennas is not strictly necessary such an arrangement helps to ensure a strong signal Ensure that access is available for routing the antenna cable from the antenna to the bridge When mounting an antenna indoors best performance can be achieved by m2. button The web browser wills pop up and it will bring you to the WEB UI of the Wireless Bridge 3Com Corporation Page 10 If 3Com Wireless Infrastructure Device Manager WIDMAN finds that your PC cannot connect to the Wireless Bridge by IP it would pop up a dialog requesting that you change the IP address of the device Then the utility will prompt you to enter the password of the bridge Note default password is blank If the password is correct you will be able to configure it through the WEB UI Wireless Infrastructure Device Pre IP Configuration To configure this wireless infrastructure device from this computer you will need to adjust zome of the settings zo that they are compatible The IP addresses and subnet masks must be fram the same subnetwork Please specit an IP address and subnet mask that will be compatible with the settings used by your computer Wireless Infrastructure Device Settings Obtain the settings automatically from a DHCP server ce Specify the settings IP Address Subnet Mask 255 255 255 0 Computer Settings IP Address 192 168 1 23 Subnet Mask 255 255 255 0 NOTE It can take up to 60 seconds for the 3Com Building to Building Bridge to boot up after power has been connected The Bridge will not appear in the WIDMAN utility unit boot up is complete Click the REFRESH button occasionally until the Bridge appears The first time you configure the Wireless Bridge you will
3. see an initial Settings page In this page you will setup the username password for administrator access On international versions of the Bridge you will select Country Settings on this page as well Welcome It is the first time you configure the device Please set the name and password n Wireless Bridge Username Password Confirm Password Country Austria Antenna 3CWE492 2 5dBi Cable 3CWES580 Bft 0 6dB il Change For more detailed settings of the Wireless Bridge please refer to 3Com 802 11g 54Mbps Wireless Building to Building Bridge User s Guide 3Com Corporation Page 11 6 Default Settings Property Device Name Country IP Network Setting IP Address Subnet Mask Default Gateway DHCP Server DHCP Client Spanning Tree Protocol SNMP Read only Community SNMP Read Write Community TFTP Server Time Settings Wireless Network Name SSID Band Radio Channel Broadcast SSID Wireless Security 7 Contents of CD Default Setting 3Com Building to Building Bridge For U S version United States For non U S version set by the user Obtain IP address automatically Obtained automatically with a DHCP server 169 254 X Y without a DHCP server Obtained automatically with a DHCP server 255 255 0 0 without a DHCP server Obtained automatically with a DHCP server 0 0 0 0 without a DHCP server Disabled Enabled Disabled Public Private 192 168 1 254
4. starts automatically and will guide you through the rest of the installation process If the installation wizard does not start automatically run setup exe from the root directory of the installation CD Then choose to install the 3Com Wireless Infrastructure Device Manager WIDMAN utility for helping you find the Bridge and configure its IP address The 3Com Installation CD contains the following tools and utilities 3Com Wireless Infrastructure Device Manager WIDMAN an administration tool that helps you selects 3Com wireless LAN devices and launches their configurations in your Web browser 3Com 3CDaemon Server Tool a firmware upgrade tool that can act in four different capacities Asa TFTP Server necessary for firmware upgrades and backup and restore functions Use this option if you do not have a TFTP server set up Asa Syslog Server which is necessary to view SysLog messages As an optional TFTP Client As an optional FTP Server NOTE It is recommended that you install the 3CDaemon Server tool if you do not already have a firmware tool for upgrades on your computer To install one of the tools on your computer 1 Turn on the computer 2 Insert the 3Com Installation CD in the CD ROM drive The setup menu appears If it does not appear you can start the setup menu from the Windows Start menu For example Start gt Run gt d setup exe 3 Inthe menu click Tools and Utilities In the next screen cli
5. Disabled 3Com 2 4Ghz Mixed Allow both 11b and 11g 11 Enabled None The CD ROM which is enclosed in the package should include the following contents 3Com 802 11g 54Mbps Wireless LAN Building to Building Bridge User Guide MIB Directory Includes 3Com MIBs for Network Management usage Diagnostic Utility Readme file 3Com 3CDaemon Server Tool 3Com Wireless Infrastructure Device Manager Copyright 2005 3Com Corporation All rights reserved 3Com and the 3Com logo are registered trademarks of 3Com Corporation All other company and product names may be trademarks of the respective companies with which they are associated DIA ASYG73 AAA03 Published July 2005
6. at is built into the PoE injector may have been activated to protect the Bridge from power surges Try resetting the PoE injector To reset the PoE injector 1 On the PoE injector unplug the CAT5 cables that connect to the Bridge and the Switch 2 Unplug the power cord and then wait for the PoE injector to automatically reset itself back to default The reset process normally takes about five minutes 3 Reconnect the power and CAT5 cables to the PoE injector and then wait for the Bridge to complete its startup process This normally takes about one minute To verify that you have successfully reconnected the Bridge to the network use WIDMAN to search for the Bridge It should appear in the list of detected network devices If WIDMAN cannot detect the Bridge please contact 3Com Customer Support LED Indicators After the correct connection the Power LED and the Ethernet link LED of the 3CRWE920G73 indoor bridge should light up On the front of the Wireless Bridge you will find three LEDs lt gt WIRELESS ETHERNET 1 POWER LED Off Power supply connection not available or broken On Power supply connection OK 2 WIRELESS activity LED Off No activity Blinking Sending and receiving data 3 ETHERNET LAN link LED Off No LAN connection available On LAN connection OK 4 Software Installation Insert the installation CD ROM delivered with the 3Com WLAN Building to Building Bridge into your CD ROM drive The installation wizard
7. ck the tool you want to install Follow the instructions on the screens to complete the installation Reboot the computer if prompted to do so 6 Launch the tool from the Windows Start menu 5 Find your New Wireless Bridge To find your new Wireless Bridge you will need to connect the Wireless Bridge to the same physical LAN network as your PC By default the Wireless Bridge will use DHCP Client mode to get an IP address from a DHCP Server If your network does not have a DHCP server the Bridge uses a default IP address of 169 254 X Y where the X and Y is the last two bytes of the MAC address in decimal value respectively You can use that default IP address to configure the Wireless Bridge through a web browser directly To find your new Wireless Bridge open the 3Com Wireless Infrastructure Device Manager WIDMAN utility On start up the dialog box will look like the figure below ae 3Com Wireless Infrastructure Device Manager EEJ Wireless Network Tree Wireless Network zA 3Com A 3Com Building to Building Bridge B Com Building to Building Bridge 4 3Com 3Com B Som Access Point Properties Configure Refresh Choose NIC Close Help Click the Refresh button and the 3Com Wireless Infrastructure Device Manager WIDMAN utility will begin to discover devices After finding the new Wireless Bridge it will list it in the list box Choose the Wireless Bridge in the list box and then click the Configure
8. com Quick Start Guide 802 Tig 54Mops VLAN Building to Building Bridge Outdoor 3CRWEASYG73 Indoor 3CRVE920G73 http www 3com com Published July 2005 Quick Start guide version2 0 1 1 Introduction Thank you for choosing the 3Com Corporation 802 11g 54Mbps Wireless LAN Building to Building Bridge The outdoor version of 3Com 802 11g Wireless Bridge is ideal for rough outdoor environments and covering long distances whereas the indoor version has a smaller profile to be unobtrusive and can be customized to the application with a variety of antenna selections They can be configured as an inter building wireless bridge with maximum 54Mbps transmission rate This manual will give you a short introduction to the device s and will help you to start the Wireless Bridge step by step quickly To install and manage this product you will need a working knowledge of network structures terms and concepts and a professional level of experience in installation procedures for network operation systems under Microsoft Windows In this Quick Start Guide you will find just the most basic information needed to install your Wireless Bridge and get it up and running For more detailed installation and configuration please consult the 3Com 802 11g 54Mbps Wireless Building to Building Bridge User s Guide 2 Package Contents Please ensure that the package is complete before beginning with the installation The package should include the foll
9. ilable for routing the Ethernet cable from the bridge to the Ethernet connection inside Make certain that the antenna mast is appropriately grounded Proper grounding can prevent injury or damage from lightning strikes After installing the bridge the highest allowable power level is automatically set when country selection is configured Adhering to this configuration ensures compliance with national laws Align and Polarize the Units For optimal performance position the antenna so that there are minimal obstacles between it and any other antenna with which it will communicate While maintaining a direct line of sight between antennas is not strictly necessary such a configuration helps to ensure a strong signal As mentioned earlier this is not always possible in long distance configurations Any two bridge units that are to communicate with each other must be set for the same polarization either horizontally or vertically If cross polarization occurs the link with either work poorly or not at all Please refer to the Polarization section of the User Guide for further details The following illustration shows proper alignment orientation and polarization for optimal performance U 10d ZIYOH U Bridges should be identically polarized vert pou fl either horizontally or vertically ij 10d ZIHOH y 3Com Corporation Page 6 Antenna Specification The following antennas and cables are available from 3Com Corporati
10. on Antennas 3CWE591 6 8dBi Dual Band 3CWE598 8 10dBi Dual Band Panel 3CWE495 13 dBi Sector Panel Omni directional Antenna Antenna Directional PN aa i 3CWE596 18 20dBi Dual Band Ultra Low Loss Coaxial Panel Antenna Antenna Cables 3CWE580 6 foot 3CWE581 20 foot 3CWE582 50 foot NOTE Because of power level restrictions use of the 3CWE495 13dBi and 3CWE596 18dBi antennas is not allowed in some countries The highest allowable power level is set automatically when you configure antenna selection after installing the bridge To comply with power restrictions identical antennas using 6 foot cable must be separated by at lease the minimum distances shown below Minimum Distance for Full Throughput approximate Antenna dBi Meters Yards 18 200 218 13 50 55 8 10 11 4 2 2 Connect to the Power Source and the Local Network 3CRWE920G73 Indoor Wireless Bridge re antenna To Access Point Connect a twisted pair CATS Ethernet cable from Bridge the To Hub Switch port of the PoE Adapter to a free port on the hub or switch within the local network 3CRWEASYG73 Outdoor Wireless Bridge AC power Lightning adapter arrestor To Access Point Bridge NOTE 3Com recommends that you use a weatherproof and shielded CAT5 cable to help protect the Bridge and your network equipment from lightning and power surges If the Bridge failed to power on or if it lost power the automatic shutdown feature th
11. ounting the antenna near a window facing the opposite bridge Make certain that the antenna and antenna mast are appropriately grounded Proper grounding prevents injury or damage from lightning strikes Installing the 3CRWEASYG73 Outdoor Wireless Bridge Mount the Unit to a Mast Follow the instructions that come with the bridge mounting hardware and follow the general guidelines listed below NOTE Mast should extend above bridge 1 meter 3 ft Recommended Pole Diameter 2 2 5 Ethernet Cable Connection Maximum Pole Diameter 3 iL Bridge may be installed to freestanding or roof mounted To indoor mast connection For best performance place the antenna outdoors using the mounting hardware provided with the antenna Placement is especially important if the building is of metal construction or has metal siding If necessary you can mount an antenna inside a building however indoor placement reduces the antenna s effective range To ensure the physical safety of anyone near the antenna and to prevent damage to the bridge follow the building codes for antenna installations in your area This is another good reason to make sure that only a professional performs the installation Keep in mind that in order to comply with FCC radio frequency radiation exposure guidelines a minimum body to antenna distance of 2 meters 6 feet must be maintained while operating this device Ensure that access is ava
12. owing components 3CRWE920G73 3CRWEASYG73 Indoor 802 11g 54Mbps Building to Building Bridge Outdoor 802 11g 54Mbps Building to Building Bridge 3Com 802 11g Wireless indoor Bridge 3Com 802 11g Wireless Outdoor Bridge Mounting kit for wall or ceiling mount Mounting kit for wall or mast mount CD ROM containing software and documentation CD ROM containing software and documentation Single Port PoE Feeder o Single Port PoE Feeder Note Indoor Bridge does not ship with an antenna Lightning arrestor See www 3com com or your reseller for antenna options 3 Hardware Installation Installing the 3CRWE920G73 Indoor Wireless Bridge On a flat surface 1 Find a surface that is clear of debris 2 Set the bridge down on its four rubber feet On a wall 1 Use the mounting template as a guide to make two marks 7 40cm 2 91 inches apart on the wall Use the vertical line on the template to ensure that the placement of the marks is plumb to the wall 2 Drill holes at the marks Use a 5 mm 3 16 inch drill bit if using the provided screw anchors use a 3 mm 1 8 inich drill bit if using the screws only 3 Install the two flathead screws at the marks on the wall Leave the screw heads protruding 6 mm 1 4 inch from the surface of the wall 4 Hang the bridge on the screws using the mounting holes on the back of the bridge On an acoustical ceiling 1 Attach the mounting bracket to the back of the bridge with two number 6 panhead screws
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