Cisco 4G-ANTM-OM-CM, Manual, Page: 447 / 535

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Cisco Multi-purpose Integrated Antenna (ANT-MP-INT-OUT-M)
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Select your installation site with safety, as well as performance, in mind. Remember that electric power lines and phone
lines look alike. For your safety, assume that any overhead line can kill you.
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Contact your electric power company. Tell them your plans and ask them to come look at your proposed installation.
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Each person involved in an installation should be assigned to a specific task, and should know what to do and when to do
it. One person should be in charge of the operation to issue instructions and watch for signs of trouble.
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If the assembly starts to drop, move away from it and let it fall. Because the antenna, mast, cable, and metal guy wires are
all excellent conductors of electrical current, even the slightest touch of any of these parts to a power line completes an
electrical path through the antenna and the installer.
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If any part of the antenna system should come in contact with a power line, do not touch it or try to remove it yourself. Call
your local power company to have it removed safely.
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If an accident occurs with the power lines, call for qualified emergency help immediately.
Antenna Installation
This section covers the following topics:
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Installation Notes
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Tools and Equipment Required
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Install the Antenna onto the CGR 1240 Router
Installation Notes
This Cisco Multi-purpose Integrated Antenna is designed to be mounted directly onto the router.
In addition to antenna orientation, wireless access point installation location with respect to all wireless clients plays a significant
role in determining overall network performance.
Because antennas transmit and receive radio signals, their performance can be adversely affected by the surrounding
environment including distance between the Field Area Router (FAR) and cellular base station, physical obstructions, or radio
frequency (RF) interference.
Follow these guidelines to ensure the best possible performance:
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Install the router with antenna without physical obstructions. Barriers along the line of sight between the FAR and cellular
base station degrade the wireless radio signals.
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The density of the materials used in a building's construction determines the number of walls the signal must pass through
and still maintain adequate coverage. Consider the following before choosing the location to install your antenna:
— Paper and vinyl walls have very little effect on signal penetration.
— Solid and precast concrete walls limit signal penetration to one or two walls without degrading coverage.
— Concrete and wood block walls limit signal penetration to three or four walls.
— A signal can penetrate five or six walls constructed of drywall or wood.
— A thick metal wall or wire-mesh stucco walls causes signals to reflect back and cause poor penetration.
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Avoid mounting the antenna next to a column or vertical support that could create a shadow zone and reduce the coverage
area.