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With MURS Radios Range Is Measured in Miles, Not Feet. MURS Has a Power Increase of Four Times That of Commonly Available Unlicensed Radios

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With MURS Radios Range Is Measured in Miles, Not Feet. MURS Has a Power Increase of Four Times That of Commonly Available Unlicensed Radios For security and access control dealers there are times when sales are lost simply because a customer doesn’t have the budget to pay for the costly installation required to implement a wired system. Or the customer may not even be able to run wires in buildings with historical significance, or across paved areas outdoors. For pre-existing construction the installation of security and access control devices at building and property entry points can be a challenge. Trenching for outside cabling and routing cable through walls and ceilings of buildings is both messy and expensive. The use of long-range wireless access control and security devices make installation much easier and therefore much less expensive to install. Using these wireless devices, access problems can be quickly solved in as little as a single day. Installation consists of locating the proper location for a device, mounting it on a pole or wall, and providing power either via an electrical outlet, batteries, or solar power. These devices consist of wireless base station intercoms and handheld two way radios, wireless call boxes with remote gate opening and keypad capability, long distance motion and vehicle proximity sensors, and there are even wireless public address and remote switch monitoring devices that can work with this system. All devices can communicate at ranges of up to a mile or more with use of external antennas. No FCC license is required, however many devices can also be programmed to work with existing licensed two-way radios. One of the best benefits of these products is that they not only eliminate the expensive wiring, but they give mobility to monitoring personnel. Personnel no longer have to be tied to a desk to receive calls and alert notices. That means they can be more productive. These wireless devices are not for use where more complex devices such as networked proximity or biometric card readers are needed, however, if simple, long-range two-way communications and remote gate/door opening with keypad entry will suffice, these solutions work well. MURS Radio Frequencies Up until recently if one of your customers wanted to use a long range wireless solution they had to either use overly crowded non-licensed radios with lots of chatter from kids, or they had to go through the cumbersome process of getting a license from the FCC. For customers who do not have existing two-way radios or who do not have a desire to get an FCC license, there is a relatively new license-free option for them. Now there is a group of frequencies and products available for them. The FCC released these frequencies in 2000, but there are still few radios available and usage is very light in most areas. This group of frequencies is called MURS (rhymes with furs), which is short for Multi-Use Radio Service. Any manufacturer can create compatible products for MURS. Page 2 of 17 With MURS radios range is measured in miles, not feet. MURS has a power increase of four times that of commonly available unlicensed radios. Unlike these other radios, you can also add a larger or external antenna to improve range. The antenna can be mounted as high as 60 feet. MURS has 5 channels and 38 privacy codes enabling you to pick up only conversations from radios transmitting your privacy code. If you have existing licensed two-way radios, most of the devices talked about here are available in licensed VHF and UHF frequencies as well. Product Applications Below are example applications where these products have been used. Wireless Security Gate Intercom A wireless security gate intercom provides long range, 2-way voice communication to a two- way radio or wireless intercom. They can be used to open gates or doors from remote locations, which means monitoring personnel do not have to be confined to a desk. These intercoms are also called "wireless call boxes" and are essentially long-range two-way radios in a water and vandal resistant case with some added features. There are no air-time or telephone service fees with these systems. A wireless gate intercom makes it possible to quickly implement a communication system without expensive and messy trenching. These gate opening intercoms have a range of up to a mile, or even further with use of external antennas. These call boxes use either UHF or VHF frequencies to communicate over long range. Most of these wireless frequencies require an FCC license, but the VHF version has the unlicensed MUR frequencies as well. These call boxes can be programmed to be compatible with virtually any brand of VHF or UHF business band radio. If the gate application requires unlocking a gate or door from a remote location, then a call box with a relay that can be controlled by pressing a button on a wireless intercom or two-way radio with the 2-tone encode feature is needed. A callbox with an entry keypad is also available that enables people to enter a code at the call box to open the gate or door. In addition to opening a gate or door, the callbox relay could be used to activate a switch output that turns on a light, sounds an alarm, or any application where remote control of an On/Off switch is required. The callbox relay can be programmed to operate in several ways: Page 3 of 17 • On/Off Code: The switch will close when a preprogrammed code is received, and open when it is received again. The switch will also open by itself when the Callbox’s preprogrammed Automatic Turn Off feature is activated. • Switch On When Called: The switch closes when the callbox first receives the call and it remains on until its Talk button is pressed, or a programmable timer expires (1- 255 seconds). • Switch On When Callbox In Use: The switch will close when the Callbox first sends or receives a call and remains closed until a preprogrammed timer expires. • Switch On When Active Includes Turn-Off Code: Switch closes when the Callbox sends or receives a call with the added ability to open the switch when the Callbox receives a preprogrammed code. • Momentary Close: Switch will close for 1-255 seconds when a preprogrammed code is received. • Alternate Open and Close: Switch will toggle between open and closed when it receives a preprogrammed code. The Callbox transmits a single beep when open and a double beep when closed. There is a version of this callbox that also can store recorded messages. This callbox can play a message when someone presses its button. This could be a message that gives the caller specific instructions on what to do. These units can also send a second and different voice message alert to the monitoring central location or portable radios. This message could give the call boxes location or it could be an emergency message of some type. There can be a total of 5 event messages as follows: • Greeting Message: This message plays when a user presses the Talk button on the Callbox. You can use it to record instructions for the user to follow such as “Welcome to our facility. An attendant will be with you shortly.“ • Identification (ID) Message: The ID message is transmitted automatically when the Talk button is first pressed. This message identifies which Callbox has been activated. A typical message might be, “South delivery entrance” or “Main Gate.” The message will be retransmitted every time the Callbox is pressed until it is answered. If the Greeting Message is used, the ID message is transmitted after the greeting is played. The ID message can be periodically until the Callbox is answered. It is also sent ahead ahead of a Sensor Detect or Low Battery/Power Fail messages. • Low Battery/Power Fail Message: This message is automatically transmitted when low voltage is detected on the Callbox. The message may say something like “Power failure” or “Low Battery.” The ID Message is sent immediately before this message. • Sensor Detect On Message: This message is automatically transmitted when a switch attached to the Sensor Input is closed. A typical message may be something like, “Door opened,” “Motion detected,” or “Vehicle present.” The ID Message is sent immediately before this message. A typical message may be something like, “Main Gate,” Vehicle present.“ • Sensor Detect Off Message: This message is automatically transmitted when a switch attached to the Sensor Input is opened. A typical message may be something like, “Door opened,” “Motion detected,” or “Vehicle present.” The ID Message is sent immediately before this message. Page 4 of 17 If no AC power is available at the gate, these callboxes can be powered by six D-cell batteries or by a solar power system. If AC is available, an optional AC to DC 12 volt transformer is available. If several callboxes are in use and the location of the unit calling needs to be known, a unique numeric identifier can be transmitted to a radio that has the ability to decode this identifier. This is like having a telephone with Caller ID capability. Or if fewer than five callboxes are needed and the five MURS unlicensed frequencies are being used, then separate channels can be assigned for each callbox. For wireless gate communications, a wireless security gate intercom like the Callbox XT Outdoor Wireless Intercom offers clear wireless voice communication and remote gate unlocking, quickly, without expensive trenching and monthly air-time fees. Delivery Door/Loading Dock Intercom System Many industrial, retail, and other businesses have delivery doors or docks where the delivery companies drop off packages, inventory, and supplies.
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