Cisco BR1400 Deployment Manual page 6

EIRP = Peak Transmit power (30dBm or 1 Watt) + 6 dBi = 36 dB (4 Watts), a constant.
Point-to-point UNII-3 systems, may employ the transmitting antennas of directional gain up to 23
dBi, without any corresponding reduction in peak transmit power. For antennas with gain greater
than 23 dBi, a dB reduction in output power is required for every corresponding dB increase in
excess of 23 dBi.
EIRP = Peak Transmit power (30dBm or 1Watt) + 23 dBi = 53 dB (200 Watts), a constant.
2 BR1400 Wireless Bridge Product Introduction
Cisco's BR1400 Series, brings about one of the most flexible and feature rich bridging products
Cisco has ever made. It was designed to deployed quick and easily in a multitude of different
environments and for different purposes.
The BR1400 Series Wireless Bridge is designed for building to building Wireless connectivity.
Operating in the 5.8 GHz UNII 3 Band (5725-5825 MHz), derived from the 802.11a standard,
the bridge delivers 6 to 54 Mbps data rates without the need for a license.
This allows anyone to deploy FCC certified bridges anywhere in the US without applying for or
paying for special licenses (note: some restrictions may apply over special areas such as airports
and military bases). This allows for networks to be quickly deployed and then moved if necessary
without any licensing or government reporting. An example would be at an airport or Homeland
Security application where operations need to place cameras and or other data links near critical
areas. By placing a single bridge on top of a tall structure (such as a control tower) and another on
a power/light truck pointing toward the control tower, they have effectively made a full secure link.
Continuing with the scenario as often as required they could move the power/light truck and
effectively move the link through the grounds an endless number of times, each time without
worrying about trenching cables or applying for licensees.
Bridge 1400 is IOS based, and it has the following IOS features:
• Transparent bridging between the wired Ethernet and wireless 802.11a Radio Interface.
• Native Ethernet and 802.1q tagging is supported on both the wired Ethernet and wireless
802.11a Radio interfaces.
• Support for 802.1d Spanning Tree Protocol.
• Support for 802.1q Virtual LAN to work in conjunction with a Switch/Router attached to
the BR1400.
• Support for Port Aggregation Protocol (PagP) and Fast Ether Channel (FEC) providing up
to 100 Mbps of combined bandwidth, by stacking two BR1400 bridges.
• QoS support, 8 transmit priority queues are provided in IOS, with 1 queue per
802.1D/802.1p user priority value for the radio interface.
• IP TOS/DSCP based classifications are supported for classifying voice packets.
• Link level redundancy for P2P using STP.
• Security:
Copyright © 2004 Cisco Systems, Inc. All rights reserved.
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