Posts Tagged ‘Tetra’

Connecting Through The Trunking Systems

The working of a Trunking Systems for people who are not aware of the term can be said to functioning the same way as a trunk of a tree that connects all the different branches of a tree to the roots of the tree. It acts as a medium or a bridge between the two. The same way this system works by connecting different tetra radio with a common base station. The science was not invented for the radio industry but has been taken from the telephone technology where trunking was used for STD connections.

Trunking systems helps in:

  • Minimizing the total number of lines required otherwise for any project related to one to many or many to many connections.
  • The infrastructure and the raw material required for the same also gets reduced drastically.
  • The total number of lines that would have remained idle otherwise will be reduced as trunking system itself finds an empty line for transmission and receiving of messages which otherwise would require one line each for receiving and transmitting messages. Multiply these with the total number of users that would be transmitting and receiving messages at a time and you would know that the lines required for such connections can go as high as a million.
  • The trunking systems reduces the hassle of maintaining so many lines and provides a hassle-free solution for establishing the same number of connections with a minimum number of lines.
  • The system is a boon for services related to defense and emergency as minimum number of lines to handle makes it easier and swifter to transfer messages.

Be the first to comment - What do you think?  Posted by johndysons - March 29, 2013 at 6:58 am

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It is Worthwhile to Use the 2 Way Radio

A 2 Way Radio is a standard digital radio that has been designed to enhance the communication performance even in the country area. It can transmit and receive the voice, content and other ancillary services at a same time without changing the radio frequency. A 2 way radio often provides instant communication in the remote areas which are prone to a network coverage problem. It offers cost-effective communication and gives awesome communication performance at work or on the job site. Many wireless radios including DMR radio and PMR radio also offer the same function. It is also available in a handheld configuration like walkie talkies or Tetra radio.

The Digital Two Way Radios offer superb audio performance by using Forward Error Correction (FEC) and Cyclic Redundancy Check (CRC) coders. These coders detect and automatically correct the transmission errors. A two way transceiver in a police radio plays a very major role. It can be easily carried by the police personnel and allows them to communicate instantly in time of emergency situations like road accidents, riots, etc. Because it is also among the most famous Trunking Systems, they are widely used by railway transportation staff for train radios and also in the Defence Service.

The 2 Way Radio batteries are highly durable that last for a longer time. These radios are portable, easy to carry and can be comfortably clipped in clothing. With the use of Narrowband Codecs Technology, it offers crystal clear sound quality even in the noisy background. PMR radio and Covert radio are made up of premium quality raw materials that are shock, water, and dust resistance. They are ideal when used within workplaces to communicate with the multiple parties that are located at a far distance. Because of outstanding features and wide applications a 2 Way Radio is truly worthwhile to use.

Be the first to comment - What do you think?  Posted by johndysons - January 1, 2013 at 9:57 am

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Covert Radio – A Small and Easy To Hide Radio

Electromagnetic waves of radio since 1870s have created a revolution in the field of communication and IT. Immediately after its invention, radio became one of the most powerful modes of communication of its time. Although, at present we use radio may be only for listening songs or for the entertaining programs it offers, with the passage of time, some people have recognized many of the benefits the technology of radio has to offer and created different kinds of radios. It can range from license free radio to licensed radios. Electronic gadgets making companies produce different kinds of radios considering its utilities. Some of the kinds of radios are briefly introduced in this article.

Let me first start with Covert Radio. The name itself suggests its utility. Yes, it’s a hidden radio which can be inbuilt in any of your electronic devices. Some companies even produce it in such a way that it matches with your skin colour and can be inserted in your ear. Then there is this 2 way radio. Using this kind of radio one can communicate with other radios having similar frequency. So here, the transmission is both ways. Even in this kind of radios, there are digital two way radios and analogue radios. Digital radios are the advance ones as they facilitate transmission of texts also.

And then there is PMR radio i.e. Private Mobile Radio that is license free radio for private and commercial use available in majority of the countries of the world.

Be the first to comment - What do you think?  Posted by johndysons - November 30, 2012 at 6:08 am

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Walkie Talkies – A Compaq and Easiest Means of Sharing Messages

Walkie Talkie

Walkie talkies are the handheld tools popularly known as two way radios also. This system functions on the principle of half duplex, wherein messages can be sent and received one at a time. Users have to press the button present in walkie talkie to send the message and have to release it to receive the message. Their functionality is not bound to any time duration or size duration. Users can send longer messages also. Walkie talkies are mostly used in malls, defence offices, commercials and also for personal use in large distances.


If we recall the old days, our parents use to make trunk calls. You must have wondered ample of times thinking about the meaning. Trunk calls follow Trunking systems wherein from single frequency, multiple connections can operate. This enables easy and secured sharing of information within the organization. Though there are many modes of communications available in the world due to technological development, the base for these modes remains the signals of the network. There is a huge indoor and outdoor coverage problem in rural or congested areas. Repeaters amplify the existing signals from the nearby base transceiver system and provide fair coverage and voice quality.

Continuous growth have evolved the production of DMR Radio (Digital mobile radio) providing services of optimum privacy to the confidential conversations and also providing good coverage and voice quality. Terrestrial trunked radio (Tetra) is yet another radio derived from ETSI. It works on two RF’s (radio frequency) and used mainly by government projects, hospitals and commercial offices.

Be the first to comment - What do you think?  Posted by johndysons - November 15, 2012 at 11:30 am

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The Trunking Systems and the Working of Other Radio Systems for Security and Entertainment

In the past when the mobile phones were not available and it was not within everybody’s means to have landlines with the STD and ISD connections. The Telephone Exchange used to offer the use of trunk calls, to where ever you needed. This was possible with help of the Trunking systems.

The idea of trunking, in which a main telephone switch board with many connections that use a same sound wave length can use instead of each one being allotted a different personal link. A miniature form of the trunking system can be seen in offices where a telephone operator and intercom systems are used.

With the use of the two way radio handset, called walkie talkie, nobody can complain about the communication amongst the working team or other group members. But, yes, one has to watch the area coverage by the walkie talkies. The walkie talkies were originally designed for the exclusive use of the police and security force. Later on the commercial models of the same were sold in the market for the use in many professional fields like construction.

The PMR radios were replaced with an advanced version called DMR radio or the digital mobile radios. The DMR offers talking, information and various other facilities and aspects. The chief motto of the DMR is to offer an easy to handle, minimum price factor and inter usable feature with all the other brands.

Instead of using many radio sets and other connecters to improve the reception range of the service repeaters are used at intervals to increase the area of reception of conversations, information and other features. Tetra or the terrestrial trunked radio is movable radio working on two frequencies. Tetra was patterned mainly for the use of various departments of the governing bodies and other SOS services.

Be the first to comment - What do you think?  Posted by johndysons - August 9, 2012 at 9:34 am

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An Array of Radios Available for People to Use for Entertainment and Work

Covert radio is a small radio used for security purposes. But of course it can be used for wrong ulterior purposes. It all depends on the user. It would be a welcome step, if it is used to safeguard personal belongings. This piece of radio is to be worn by a person in hidden manner.

The tetra version of covert radio is the latest introduction in the market. The compactness of the model makes it very easy for people to wear it without being spotted by anybody. This is an ideal model that can be used to spot a wrong move in the locality.

Covert radio can be operated from a long distance. This device can identify the voice of the people selected. In case of long session of vigilance use it’s quite a surprise that this tiny instrument can seek the person requiring help and also the people using it.

A radio that can be used to send and get a talking session is called a 2 way radio. A two way radio permits the user to chat with the other radio users on a same radio station. The 2 way radio is available in cell phone, held in a hand or a radio kept on a table. With the television and other electronic goods switched over to the digital technology the two didn’t lag behind and lo! Digital two way radios emerged.

The PMR radio or the professional mobile radio is a version of a two way radio that is used by professionals to enhance their business or career. A licence free radio can mean that licence is not necessary or it is not charged. This radio can be used by anybody who wants to get in touch with family or friends without worrying about the call /roaming charges.

Be the first to comment - What do you think?  Posted by johndysons - at 9:32 am

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Development of Digital Two Way Radios

Information and Technology has developed rapidly within last decade and now in 21st century the means of communication has reached a level where there is no barrier to it. Now people are free to use individual network lining and can avoid any bad audio quality or fading problems. There are trunking systems that allow better radio frequencies without any line breakage or fading. These systems are comparatively cheaper to older individual lining system.

The digital radio broadcasting technologies now has developed better systems and networks for digital two way radios giving the DMR radio better options to connect and work. These are 2nd generation radio systems and as they are two way, you can both transmit and receive message. These radio systems are most useful for security agencies for individual and mass protection. Police, fireman, military and such security agencies use these types of radio mobile systems.

These systems can be of different types, depending upon their use they can be mobile, stationary base, and walkie-talkies. To work these types of radio the networking system needs different levels of support and backup. Such supports should be provided without any interruption and for this a direct satellite network connection is also maintained specially in the case of military and high level security systems. In mountain areas the network gets blocked by different blocks and frequency mix and to solve this problem repeaters are used. A repeater takes the message and retransmits it to higher level so that the message goes without any interruption to long distance.

Digital Mobile Radio (DMR) is an upgraded open digital radio system for Professional Mobile Radio (PMR) and to support them the ETSI (European Telecommunications Standard Institute) made Terrestrial Trunked Radio (TETRA) system. It is a two way receiver and is best for mass security purpose, because with this system one can transfer and receive message from point to point and from point to multipoint and vice-versa. These radios can also be operated hands-free and so can be referred as covert radio.

A digital licence free radio is latest addition to two way radio system that gives you charge-free communication facility. This system is used for private use and they work with the help of repeaters and internet. The only drawback of this radio system is that they work only within few kilometres range that too if the area is clear and viable for PMR and DMR frequencies.

Be the first to comment - What do you think?  Posted by johndysons - July 13, 2012 at 9:00 am

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