3Com 3CRWE725075 Configuration Manual - Page 6

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Remote Building Wireless Access with the AP8250 and

802.11g Upgrade Kit

This installation scenario describes one layer of bridging with one Root-Bridge and one Child Bridge. This

scenario is common, for example, in schools or universities where students or professionals in remote

buildings need secure, high-bandwidth 802.11b or 802.11g access to the network.

In this configuration, an AP8250 or AP7250 is placed on the network and an AP8250 with the 802.11g

Upgrade Kit is placed at each of the desired remote locations.

The access point at the center of the network is configured as the Root Bridge with an

omnidirectional antenna.

The remote bridges are configured as Child Bridges and use an 8 dBi directional antenna

(3CWE495), which is aimed at the Root-Bridge.

Because the WDS radio and the local access point radio are operating in approximately the same

frequency range, the following guidelines must be followed for successful installation:

The WDS link should be configured on Channel 2 or Channel 10.

The access point radio should be configured on the other Channel (for AP8250 and

AP8750 only).

The directional antenna for the WDS link must be located at least three feet from the

AP8250 and aimed away from the AP8250.

The radio that is using the external antenna must be configured to transmit from the

appropriate antenna connector (this is configured on the Radio Settings page in the

Configuration Management System).

Required Products

To use this configuration, you need the following products:

Root Bridge

Each Remote

Location

(Child Bridge)

Child Bridge 2

AP8250 or AP7250 (3CRWE825075A or 3CRWE725075A)

Ultra Low Loss Cable (3CWE580 or 3CWE581 or 3CWE582)

8 dBi Omnidirectional Antenna (3CWE491)

AP8250 (3CRWE825075A)

802.11g Upgrade Kit (3CRWEGMOD75A)

Ultra Low Loss Cable (3CWE580 or 3CWE581 or 3CWE582)

8 dBi Panel Antenna (3CWE498) or 13 dBi Panel Antenna (3CWE495)

Child Bridge 1

Root Bridge