Cisco Aironet 1400 Series Manual page 16

Do not install the antenna near overhead power lines or other electric light or
power circuits or where it can come into contact with such circuits. When
installing the antenna, take extreme care not to come into contact with such
circuits, because they may cause serious injury or death. For proper
installation and grounding of the antenna, please refer to national and local
codes (for example, U.S.:NFPA 70, National Electrical Code, Article 810,
Canada: Canadian Electrical Code, Section 54).
9-dBi Omnidirectional Antenna
The 9-dBi omnidirectional antenna covers 360 degrees, so it can receive
signals from any direction. See the Cisco Aironet 1400 Series Wireless Bridge
9-dBi Omnidirectional Antenna document that ships with the antenna (and is
also on Cisco.com) for additional information.
9.5-dBi Sector Antenna
The 9.5-dBi sector antenna covers a 90-degree sector, so it can receive signals
from multiple bridges within range within that sector. See the Cisco Aironet
1400 Series Wireless Bridge 9.5-dBi Sector Antenna document that ships with
the antenna (and is available on Cisco.com) for additional information.
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