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Cisco Multiband Indoor 4G Volcano Antenna (ANT-4G-CM-IN-TNC)
Ceiling-mount Volcano antenna, with integrated TNC cable
Antenna bracket
Flat washer
Curved spring washer
Mounting nut
Three #6 x 1-1/4” mounting screws with anchors
Three self-adhesive screw covers
Installation Requirements
Antenna Connections
Before you install or replace antennas, make sure the router is:
Powered off
Disconnected from all power sources
Disconnected from the Field Area Network (FAN)
Removed from a pole-top installation
Optimum Performance
Antennas transmit and receive radio signals which are susceptible to RF obstructions and common sources of interference that
can reduce throughput and range of the device to which they are connected. Follow these guidelines to ensure the best possible
performance:
Keep the antenna away from metal obstructions such as heating and air-conditioning ducts, large ceiling trusses, building
superstructures, and major power cabling runs. If necessary, use a rigid conduit to lower the antenna away from these
obstructions.
The density of the materials used in surrounding buildings’ construction impacts antenna signal strength. Consider the
following
—
Signals penetrate paper and vinyl walls with little change to signal strength.
—
Signals penetrate only one or two solid and pre-cast concrete walls without degrading signal strength.
—
Signals penetrate three or four concrete and wood block walls without degrading signal strength.
—
Signals penetrate five or six walls constructed of drywall or wood without degrading signal strength.
—
Signals are likely to reflect off a thick metal wall and not penetrate it at all.
—
Signals are likely to reflect off a chain link fence or a wire mesh with spaces of 1 to 1-1/2 in. (2.5 to 3.8 cm). The fence
acts as a harmonic reflector that blocks the signal.
Microwave ovens and 2-GHz cordless phones can cause signal interference because they operate in the same frequency
range as the device to which your antenna is connected.
