Page 3 - Contents; Introduction; Basic Network Topologies 7; Installing the Outdoor Bridge; Installation Requirements 10; Configuring the Building-to-Building Bridge; Using the 3Com Wireless Device Manager 18
Contents 1 Introduction Basic Network Topologies 7 Point-to-Point 7Point-to-Multipoint 8 Basic Operating Modes 9 2 Installing the Outdoor Bridge Installation Requirements 10 Power Requirements 10Administration Requirements 11 Installation Guidelines 11 Proper Grounding 11Alignment 12Polarization 12R...
Page 7 - NTRODUCTION; ASIC; OINT
7 1 I NTRODUCTION The 3Com® Wireless LAN Outdoor Bridge Solution is a comprehensive building-to-building outdoor wireless LAN kit that reduces the need to evaluate, purchase and assemble separate components. One convenient package includes everything you need to offer an easy-to-manage building-to-b...
Page 9 - Two operating modes relate to the basic WLAN topologies:
9 B ASIC O PERATING M ODES Two operating modes relate to the basic WLAN topologies: ■ Ad hoc mode is the basis for point-to-point topology. Operating in ad hoc mode, two outdoor bridges can associate without an access point, allowing the LANs to which they are connected to communicate. ■ Access Poin...
Page 10 - NSTALLATION; The following items are required for installation:; OWER; safety certified according
10 2 I NSTALLING THE O UTDOOR B RIDGE This equipment must be installed in compliance with local and national building codes, regulatory restrictions, and FCC rules. For the safety of people and equipment, only professional network personnel should install the bridge, cables, and antennas. I NSTALLAT...
Page 11 - ROPER; Operating Systems; Browsers
11 for the country of use. All references to the power supply in this document refer to equipment that meets these requirements. Because the power supply plug is the only means of disconnecting the bridge from power, make sure the power outlet is accessible. See “Using the Power Supply” on page 15 a...
Page 12 - —the link will either work poorly or; ESTRICTIONS
12 minimize damage from lightning strikes. A lightning arrestor, properly grounded and installed at each building in the topology, will protect networking equipment in the building, as well as the people working there, from lightning-induced surges that travel on Ethernet cables. A LIGNMENT Position...
Page 13 - To comply with FCC radio frequency (RF) exposure limits, antennas
13 S AFETY I NFORMATION WARNING: Do not install the bridge near overhead power lines, electric light or power circuits, or where it can come into contact with such circuits. Provide ten feet or more clearance between the bridge and such power lines or circuits. Do not install the bridge flush with t...
Page 15 - LAN; Connect the cable coming from the bridge to the port labeled
15 C ONNECTING THE B RIDGE TO THE LAN You can connect to the LAN either through the 3Com power supply or through IEEE 802.3af power-over-Ethernet compliant equipment. U SING THE P OWER S UPPLY The power supply can be located indoors at any point between the bridge and the LAN access port where an ac...
Page 16 - To install the tool and documentation from the CD:
16 illustration shows the connection through a 3Com Ethernet Power Supply to a 3Com SuperStack ® Switch. I NSTALLING S OFTWARE U TILITIES The 3Com installation CD includes the Wireless Infrastructure Device Manager tool, which helps you set up and administer the wireless components of your network. ...
Page 18 - To launch the 3Com Device Manager, select
18 3 C ONFIGURING THE B UILDING - TO -B UILDING B RIDGE If the configuration that was set at the factory does not meet your network requirements, or if you want to customize the settings, you can configure the bridge through your Web browser. The 3Com Wireless Infrastructure Device Manager helps you...
Page 20 - RSSI M; Enable RSSI broadcasting as follows:
20 U SING THE P RE -IP C ONFIGURATION W IZARD You can only configure devices that are on the same subnet as your computer. To configure a device on a different subnet, you must first assign it an IP address on the same subnet as your computer. After you launch the configuration, you can change setti...
Page 22 - ETTING; IP N; ETWORK; Under System Configuration, click; IP Network Setting; —This setting allows you to change the device IP address.
22 S ETTING IP N ETWORK P ROPERTIES Under System Configuration, click IP Network . The IP Network Properties page appears, where you can change the following settings. When you are finished, click Save . ■ IP Network Setting —This setting allows you to change the device IP address. To let the device...
Page 24 - Network Mode
24 To set up protocol port filtering: 1 Under System Configuration, click Protocol Filtering . 2 In the Protocol Filtering page, click the Allow radio button next to the UDP/IP or TCP/IP protocol (or click both buttons). 3 Select the Port Filtering Mode: Allow —If you want to block most protocol por...
Page 25 - Access Point Privacy Mode; Off; Channel Selection; Automatically select the best channel
25 To maintain wireless association, the WLAN service area on a bridge and the device with which it is associated must match exactly. Therefore, if the bridge is set to specify the WLAN service area and you change the other device’s WLAN service area, make sure to change the bridge WLAN service area...
Page 26 - Wireless Network; Network Traffic Accelerator; Country
26 restrictions. Y indicates the power level that is set automatically; N indicates that a combination is not allowed. S ETTING A DVANCED P ERFORMANCE P ROPERTIES Under System Configuration, click Wireless Network . On the Wireless Network Properties page, click the link to go to advanced wireless n...
Page 27 - Acknowledgement Delay; —This setting determines the length of time the; Client Limit; —Allows you to specify the maximum number of clients that the; Data Rates; —These settings configure the data rates used for wireless; Broadcast RSSI; —This setting determines whether the device’s received signal
27 auto-negotiation. To enable flow control, click On . To disable flow control, click Off . ■ Acknowledgement Delay —This setting determines the length of time the bridge waits for an acknowledgement after transmitting packets. When the delay time has passed, the bridge resends the packets. A longe...
Page 29 - To use the device manager RSSI Monitor:
29 O PTIMIZING AN A D H OC I NSTALLATION You can optimize an ad hoc installation by adjusting antenna positions slightly to improve the radio signal between bridges. The following tools help you to optimize the installation: ■ The device manager can display a dynamic graphical representation of the ...
Page 31 - HANGING
31 Shared key —See “40-bit Shared Key (Wi-Fi)” on page 32 or “128-bit Shared Key” on page 33. Password —If you are using a 3Com Access Point 8000, you can set up password security as described in “128-bit Dynamic Security Link” on page 33. 4 Under System Configuration, click Wireless Network . 5 In ...
Page 33 - Require Windows user
33 keys in the provided spaces, then click a radio button in the Selected Key column to specify which key to use and click Save . 128- BIT S HARED K EY This option can be used with other 3Com 11 Mbps Wireless LAN devices and with equipment from certain manufacturers that also support 128-bit shared ...
Page 38 - ROUBLESHOOTING; IAGNOSING; Symptom
38 4 T ROUBLESHOOTING D IAGNOSING P ROBLEMS If you have difficulty with a 3Com Wireless LAN building-to-building bridge, try the solutions in the following table. Symptom Solutions Two bridges fail to communicate in ad hoc mode. ■ Adjust the positions of the antennas to improve reception. ■ To ensur...
Page 41 - NLINE; World Wide Web Site
41 A T ECHNICAL S UPPORT 3Com provides easy access to technical support information through a variety of services. This appendix describes these services. Information contained in this appendix is correct at time of publication. For the most recent information, access the 3Com Corporation World Wide...
Page 43 - Europe, Middle East and Africa
43 R ETURNING P RODUCTS FOR R EPAIR Before you send a product directly to 3Com for repair, you must first obtain an authorization number. Products sent to 3Com without authorization numbers will be returned to the sender unopened, at the sender’s expense. To obtain an authorization number, call or f...
Page 46 - Com Wireless LAN Outdoor Bridge Solution
R EGULATORY C OMPLIANCE I NFORMATION 3Com Wireless LAN Outdoor Bridge Solution FCC Radio-Frequency Exposure Notice This device generates and radiates radio-frequency energy. In order to comply with FCC radio-frequency radiation exposure guidelines for an uncontrolled environment, this equipment has ...
Page 48 - NDEX; Numbers
I NDEX Numbers 128-bit Dynamic Security Link 33128-bit Shared Key 333Com Knowledgebase Web Services 413Com Wireless Infrastructure Device Manager 1840-bit Shared Key (Wi-Fi) security 32 A access point network 9, 30access point privacy mode 25acknowledgement delay 27ad hoc network 9, 28adapter, choos...
