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Digital Airtime Services

 

MRA DIGA-TALK DIGITAL NETWORK
CALIFORNIA

Digital – Digital Two-Way Radio’s provide greater clarity and range, along with increased features and capabilities, such as GPS enabled systems and data functionality (text messaging). All the sites are connected into a network, so the need for the dispatch office or a supervisor to be in radio range of a tower site is eliminated. Any radio in the fleet can talk to any other radio in the fleet provided both radios are in range of the network. The very narrow digital signal allows us to split the radio channels in half which doubles call capacity and boosts efficiency. Digital Two-Way Radios are normally compatible with analog devices and all Kenwood NEXEDGE radios that are currently in service have both analog and digital capabilities. This gives businesses the flexibility to purchase digital radios while continuing to operate in analog mode with their new radios along with their older analog radios (in analog mode), until most or all of their fleet is compatible with digital, at which time they can upgrade their radio fleet service to the digital network.

FCC Compliance

Our Diga-Talk network operates under the authority licensed to MRA by the Federal Communications Commission (FCC) for the use of the radio spectrum.  All of our airtime customers that utilize our network operate under the authority granted to MRA by the FCC which negates the need for our subscribers to obtain an FCC license for operation on our network.  Any radio operation by the subscriber that does not utilize our network does require an appropriate FCC license.

DIGA-TALK ARCHITECTURE

The architecture of the Diga-Talk Network is based upon the design of Kenwood, its creator.  They have a 1st generation system and a 2nd generation system.  Our network consists of both 1st gen and 2nd gen systems.  We started with Gen 1 and expanded the system until we ran out of capacity.  Now, we are converting everything over to Gen 2 so that we can continue to provide more coverage, more features, operate more efficiently and provide a better experience to our subscribers.  All new subscribers are being activated on the Gen II system and we expect to have everyone converted to Gen II before the end of 2020.  Once the conversion is complete, all customers will experience increased coverage and have other enhanced features that will make the minor inconvenience of having their radios reprogrammed seem insignificant.

The basic network architecture is depicted below.  The network consists of tower sites that are connected via IP connection to all the other tower sites in the network per the figure below.

Kenwood NEXEDGE Wide Area Network

In the diagram above, each one of the shadowed areas represents a different radio tower site.  Each site has a different coverage area.  The network keeps track of the location of every radio on the network, so when you turn on a radio, it finds a tower site that covers the area on its own and sends a signal to the network to log onto the network.  When a group call is placed, the network sends the signal to all locations that have a unit from that talk group so that everyone in the talk group can hear the conversation.  If you move a radio out of range of one of the tower sites, the radio will look for another tower site.  Once the radio finds another tower site in range, it logs onto the network from the new location.  This is a similar function to the operation of a cellular phone.

Our Nevada Affiliate

MRA owns, operates and maintains all operations in California.  We sell, rent, service, repair, maintain, install and remove radios from our operational base in Paramount, California.  Call our offices to discuss any issues for your operations in California or if we are providing you with service in Nevada.

The portion of our NEXEDGE system in Nevada is owned and maintained by our affiliate Rebel Communications in Las Vegas, Nevada.  Rebel Communications provides our radio coverage in Nevada.  They perform the routine maintenance at the tower sites as well as sell, rent, install and maintain most of the radios on the network.  If you have any issues with the Nevada portion of the system, you can contact our office for assistance.  If you need information about the Nevada system, wish to obtain airtime service in Nevada, purchase radios for use in Nevada, have your equipment installed or removed in Nevada or just want to talk to someone about what it can do for your communications requirements in Nevada, contact:

Cody Whipple, CEO
Rebel Communications, LLC
7265 Dean Martin Drive Suite 170
Las Vegas, NV 89118
702-914-8072 Office
702-543-3505 eFAX
702-308 9627 Cell

Rebel Communications - Las Vegas

MRA DIGITAL RADIO COVERAGE

MRA has digital networked trunking located at over 60 key sites around California, Nevada, Arizona and Utah.  Each site on the network has been chosen to provide the unique coverage offered by that site to enhance the overall network coverage offered by MRA.  All sites are connected together into a network, so it is not necessary to be using the same tower site as the person with whom you are conversing.  Mobile radios will always provide the best range as they work in both the green and blue areas of the maps.  Portable radios will provide communications while away from a vehicle or while inside of a building, but they will always have less coverage than a mobile radio as depicted in only the green areas of the maps due to the factors discussed in the article “How Far Will My Radio Talk?” which is located elsewhere on the website.

DISCLAIMER:  In the maps immediately following, the green area represents the areas where all radios will work.  The blue areas require the use of a mobile radio to have usable radio coverage.  The white areas of the map do not have any usable radio coverage.  All of our maps tend to be a little conservative, so you should be able to obtain coverage that is equal to or better than what is predicted.  However, since the maps do not take into consideration local man made obstructions and trees, there may be some areas where the performance is below the predicted levels.  A good rule of thumb is that the maps are about 90% accurate, but you cannot rely on absolute accuracy and we cannot guarantee coverage to be consistent with the performance indicated on the maps.  If in doubt about the coverage, ASK FOR DEMO EQUIPMENT TO TRY OUT THE SYSTEM.

DIGA-TALK MOBILE AND PORTABLE RADIO COVERAGE

 

 

View Coverage in Google Earth

Diga-Talk Mobile Radio Coverage

 

View Mobile Coverage in Google Earth

Diga-Talk Portable Radio Coverage

 

View Portable Coverage in Google Earth

Click to view Rental ProgramsClick to view Diga-Talk Radio Products for California

 

MRA Affiliate Coverage

MRA affiliate companies have digital networked trunking located at many key sites around California and Arizona.  Each of these companies have been chosen to provide the unique coverage offered by their network to enhance the overall coverage offered by MRA.  They are connected to our network bridge so that you can use your radio in their coverage area while talking to another person in their coverage area or back home in the MRA coverage area.  Mobile radios will always provide the best performance while portable radios will provide communications while away from a vehicle or while inside of a building, but they will always have less coverage than a mobile radio due to the factors discussed in the article “How Far Will My Radio Talk?” which is located elsewhere on the website.

DISCLAIMER:  In the maps immediately following, the yellow area represents the areas where radios will work with varying degree of performance.  The white areas of the map do not have any usable radio coverage.  All our maps tend to be a little conservative, so you should be able to obtain coverage that is equal to or better than what is predicted.  However, since the maps do not take into consideration local man-made obstructions and trees, there may be some areas where the performance is below the predicted levels.  A good rule of thumb is that the maps are about 90% accurate, but you cannot rely on absolute accuracy and we cannot guarantee coverage to be consistent with the performance indicated on the maps.  If in doubt about the coverage, ASK FOR DEMO EQUIPMENT TO TRY OUT THE SYSTEM.

 

Click to view Rental ProgramsClick to view Diga-Talk Radio Products for California

 

MRA TECHNICAL DIGITAL RADIO COVERAGE

The following maps depict the MRA Digital radio network coverage in greater detail than the maps above.  There are eight main color levels of signal quality along with different shades of the various colors which shows gradual changes in signal strength.  Each color (such as from red to yellow, yellow to green, green to turquoise, turquoise to blue etc.) represents a signal strength reduction of ten times weaker except the color change from magenta to red which represents one thousand times weaker signal.  Mobile Radios will work well down to the dark blue areas, have some issues in the grey areas and not work at all in the white areas.  Portable radios will work well down to the green areas and start experiencing some difficulty in the turquoise areas.  Using a portable radio while inside a moving vehicle will have difficulty in the turquoise area and is typically not possible in the blue areas.  To use a portable radio in the blue areas, one must exit the vehicle and find a “hot spot” and stay in the hot spot to communicate with the radio.  Please see the discussion in the article “How Far Will My Radio Talk?” which is located elsewhere on the website.

DISCLAIMER:  In the maps immediately following, the various colors represents areas of different performance.  All radios will work extremely well in the magenta areas, very well in the red areas, work well in the yellow areas and work reasonably well in the green areas.  The turquoise blue areas are a bit unreliable for portable radios and very unreliable in the blue areas, but mobile radios should work well.  The gray area is marginal coverage for a mobile radio and the white areas of the map do not have any usable radio coverage.  All our maps tend to be a little conservative, so you should be able to obtain coverage that is equal to or better than what is predicted.  However, since the maps do not take into consideration local man-made obstructions and trees, there may be some areas where the performance is below the predicted levels.  A good rule of thumb is that the maps are about 90% accurate, but you cannot rely on absolute accuracy and we cannot guarantee coverage to be consistent with the performance indicated on the maps.  If in doubt about the coverage, ASK FOR DEMO EQUIPMENT TO TRY OUT THE SYSTEM.

 

 

Click to view Digital Radio Coverage in Google Earth

Click to view Rental ProgramsClick to view Diga-Talk Radio Products for California

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