A wireless security intercom is used at locked security doors and gates.
Since their environment is usually commercial type construction, there are
several challenges that make the choice of the right intercom more important.
There are a few choices in wireless technology for a security intercom. The
types available are two-way radio, full-duplex 900Mhz, WiFi, and cell phone
network based intercoms as discussed below.
Two-way radio security intercoms (also called callboxes) use either VHF or
UHF business band two-way radio frequencies. They typically require an FCC
license, however we have callboxes in the MURS (multi-use radio service)
frequencies that do not require a license. If you have existing radios we can
also match the frequencies on those. These callboxes can have a range of up to a
mile or cover multiple floors in a building. These callboxes are paired with
either handheld or desktop base station intercoms.
The Full-Duplex 900Mhz intercom system can have a range of up to 4000 feet,
but they are more sensitive to line of sight than the two-way radio callboxes.
While the two-way radio intercoms are push-to-talk, release-to-listen, these
operate more like a phone call with both parties being able to speak at the same
time. These have noise cancellation and can be used in noisy environments,
however for extremely noisy environments we have one that has an external horn
The WiFi intercoms require a WiFi signal at the gate or door. The best part
of these is that they typically include video that can be accessed from an app
on a smart phone or via a touch screen tablet.
A cell phone network intercom uses cell phone service just like a mobile
phone. It has a phone number just like a cell phone. When a visitor arrives at
the security point they press the call button and it then calls any phone number
programmed into it. So no matter where you are you can talk to visitors at the
gate. You can also use an app to send commands to the door or gate to unlock it
or hold it open if your gate operator has that capability.
If you need help in selecting the right system for you, just call the security intercom pros at 888-298-9489.