Multi-band vs. Multi-mode Cell Phones
Dual Band vs. Dual Mode
If you travel a lot, you will probably want to look for phones that offer multiple bands, multiple modes or both. Let’s take a look at each of these options:
- Multiple band – A phone that has multiple-band capability can switch frequencies. For example, a dual-band TDMA phone could use TDMA services in either an 800-MHz or a 1900-MHz system. A quad-band GSM phone could use GSM service in the 850-MHz, 900-MHz, 1800-MHz or 1900-MHz band.
- Multiple mode – In cell phones, “mode” refers to the type of transmission technology used. So, a phone that supported AMPS and TDMA could switch back and forth as needed. It’s important that one of the modes is AMPS — this gives you analog service if you are in an area that doesn’t have digital support.
- Multiple band/Multiple mode – The best of both worlds allows you to switch between frequency bands and transmission modes as needed.
Changing bands or modes is done automatically by phones that support these options. Usually the phone will have a default option set, such as 1900-MHz TDMA, and will try to connect at that frequency with that technology first. If it supports dual bands, it will switch to 800 MHz if it cannot connect at 1900 MHz. And if the phone supports more than one mode, it will try the digital mode(s) first, then switch to analog.
You can find both dual-mode and tri-mode phones. The term “tri-mode” can be deceptive. It may mean that the phone supports two digital technologies, such as CDMA and TDMA, as well as analog. In that case, it is a true tri-mode phone. But it can also mean that it supports one digital technology in two bands and also offers analog support. A popular version of the tri-mode type of phone for people who do a lot of international traveling has GSM service in the 900-MHz band for Europe and Asia and the 1900-MHz band for the United States, in addition to the analog service. Technically, this is a dual-mode phone, and one of those modes (GSM) supports two bands.
In the next section, we’ll take a look at 3G mobile-phone technology.
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The mobile phone has a longer history than many might think. 30 years ago, on 10 November 1981, NMT – Nordic Mobile Telephone – the world’s first fully automatic mobile phone system, was launched in Oslo. This was the set-off for a remarkable mobile phone adventure.
We did have a manual mobile phone system from 1966 (OLT-Offentlig landmobiltjeneste [public land mobile service]) in Norway. But things really shifted into gear in 1981 when NMT-Nordic Mobile Telephone – the world’s first fully automatic mobile phone system that could be used in several countries, was launched.
“The demand for mobile phones was much greater than anyone had anticipated and the growth of usage was explosive. In 1984, we had 38,300 NMT subscribers distributed across 281 base stations. In 1988, Norway had the world’s highest density of mobile phones,” says Hans Myhre, former director of the NMT Group.
Where it all began
“The idea of a mobile phone service that was just as easy to use as regular landlines emerged at a Nordic conference for telecommunications at KabelvÃ¥g in the Northern part of Norway as early as 1969. The participants agreed upon a joint, automatic mobile phone system that could be used across all of the Nordic countries,” explains Hans.
And in 1970 the work began. The 450 MHz frequency band was chosen for the new network that was to be established. The frequency had to be available in all of the countries, so it would be possible to call each country directly. Deciding on the functionality was easy. But it took some time to get the technology in place. In 1975, NMT was approved as a technical standard at the Nordic Telecommunications Conference. A trial network was established in Stockholm in 1976. In 1978, the first exchange was available to order, and the next year the first base stations.
“Our philosophy was always to have an open interface and full standardisation. Patents usually only create problems. This meant that the operators were able to collaborate. We had user-friendly terminals, simple pricing models and complete interoperability across the borders. The mobile phones were sold by independent dealers who competed fiercely. And there was also a market for mobile phones. Customers saw a practical solution to their needs. These were the reasons why it became such a success,” Hans points out.
NMT in operation
The new NMT network was launched according to schedule in 1981 in Norway and Sweden. Sweden opened in October, with Norway following in November. Denmark and Finland launched in January and March 1982. Few people know that Saudi Arabia, which had the same system, started using it in August 1981, and was therefore the first country to use the system.
In 1981, eight mobile phone operators had received approval for their terminals and were ready to launch: Simonsen (Norway), Siemens (Norway), AP (Denmark), Storno (Denmark), SRA (Sweden), Salora (Finland), Mitsubishi (Japan) and Motorola (USA).
More growth
During the first phase, coverage was only available in Eastern Norway, but this was expanded to the rest of the country over the next four years. By 1985, the system covered the entire country.
The mobile phone service was initially national, but from September 1982, NMT, as the first mobile phone system in the world, was opened for roaming between the countries using it.
“We quickly realised that we had underestimated the growth. The demand for mobile phones was much greater than anyone had anticipated. In 1984, we had 38,300 NMT subscribers distributed across 281 base stations. In 1985, our capacity problems in Oslo and Akershus were so great that we had to introduce a licence limit, which obviously caused a lot of trouble,” Hans says.
“In 1983, we had already begun to work on a supplementary system using the 900 MHz band, with new technological opportunities. The industry was informed that this system would be launched in 1986. The number of channels would increase from 180 to 2000. Since the range of the 900 band was much shorter, many more base stations were also needed.”
In December 1986 NMT-900 was launched. NMT-450 was launched in Iceland at the same time. At that time, Norway was ranked number three in the world with 81,000 mobile phones, after the USA with 450,000 and Sweden with 100,000. In 1988, Norway had the world’s highest density of mobile phones with 33 mobile phones per 1000 inhabitants. Sweden and Iceland ranked in second place with 24 per 1000.
International system
Even though NMT was a Nordic system by name, several other countries thought that NMT was a smart system, and both the Netherlands and Switzerland started to use it. Later on they joined the roaming agreement and the NMT Group. In 1990, even the Soviet Union chose NMT-450 as its national system before the country was dissolved. All together, NMT-450 was introduced in 30 countries, and just over ten countries started to use NMT-900.
Monster mobiles
Many people have heard stories about the size of mobile phones in the 1980s, and the first NMT phones were big and bulky, weighing in at about 10-15 kg. The lightest mobile phone was the Norwegian phone Simonsen, weighing just 7 kg. The batteries were the main reason for this weight, as the electronics and the radio unit required a lot of energy. But the electronics industry was in rapid development, and in 1986, Mobira (Nokia), Motorola and NEC introduced handheld NMT-900 mobile phones weighing a couple of hundred grams. However, the phones came with a heavy price tag of 30,000 NOK. Around 1990, handheld NMT-450 phones were also introduced, and the price for the terminals dropped heavily towards the late 1980s.Â
From analogue to digital
NMT was an analogue system. In the early 1980s, it was already evident that the future was digital. Digital technology could offer higher capacity than analogue. Conversations could also be encrypted. In 1989, the GSM standard, which consists of a great deal Norwegian technology, was ready. In 1993, GSM became operational, and the rest is history.
“But I have to mention that 1994 was the year when NMT had the highest number of subscriptions, and this was the year after the introduction of GSM. It wasn’t until 1995 that GSM really started to break down the hegemony,” says Hans.
Swansong
On 1 March 2001, after 15 years of operation, NMT-900 was closed down. The frequencies were needed for GSM, which was growing rapidly. But NMT-450 was in operation until 31 December 2004.
“Many were sorry to see the frequency band closed down, as the range of the 450 MHz signals was unique. There were even examples of vessels being able to establish a connection with a location between Norway and Iceland under certain atmospheric conditions.”
Even though NMT-450 had large area coverage, the coverage of today’s 2G is unrivalled. NMT-450 had a maximum of 85 per cent area coverage and 98 per cent population coverage. Today 2G covers 99.5 per cent of the population. Most of the base stations also offer 3G and are prepared for 4G.
“However, when we talk about 2G, 3G and 4G today, do remember that NMT was 1G: the first generation of mobile telephony that laid the foundations for the industrial revolution we are all a part of. Our NMT experience is priceless and has strongly contributed to the success of GSM,” says Hans Myhre.
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THE TRUTH ABOUT CELL TOWERS
Cell Towers are popping up in everyone’s backyard these days. And most of us fail to realize the dangers involved in having these monsters looming over our neighborhoods or even strategically placed atop our schools, churches or apartment buildings. Having a mobile phone – and the risks of using one – is an individual choice. What is NOT an individual choice is whether a mobile phone tower – with all of it’s health risks – is placed in your neighborhood.
A 2004 German government study found that people living within 1300 feet of cell towers had THREE TIMES the normal cancer risk. A French medical study of people living within 1,000 feet of cell towers documented an unusually high level of complaints of extreme fatigue, memory loss, headaches, sleep disorders, depression, skin problems, hearing loss and cardiovascular problems. The Indian government has banned mobile phone towers in school and hospital premises and directed cellular firms to take permission from residents welfare associations before setting up base stations in residential areas, in efforts to limit the harmful effects of electromagnetic radiation exposure.
* For the location of cell tower antennas in your neighborhood Click Here *
A resolution by the International Association of Fire Fighters (IAFF) opposed commercial cell towers on fire stations after a medical study showed increased cancer, brain and nerve problems for irradiated personnel. There is an undertone to the arguments on the side for cell towers of “If you can’t see or smell or taste anything wrong, what’s the problem?” The fact of the matter is that unless you have a geiger counter, you don’t know how much radiation is present. If you don’t have a gaussmeter, you cannot measure electromagnetic fields, so the intangibility of of the damage is enough for the ignorant masses to pretend they don’t exist, at least until they get cancer.
We are dealing with the issue of pure greed on the part of these wireless companies. They care NOTHING about the dangerous health effects on people living near these towers of doom. Telecom providers are not required by law to consider health effects in their siting proposals thanks to our sellout traitorous politicians. The Telecom Act of 1996 prevents local planning authorities from prohibiting cell tower construction on the basis of health considerations. Thanks to this corrupt unconstitutional federal law, city planners are obligated to rubber stamp whatever facilities wireless providers say they need for ‘essential’ services. Do we need to sacrifice our health for the convenience of cell phone users, and for the billion dollar corporations that get rich at our expense?
Despite all of this, you still have SOME rights concerning the placement of these towers, such as finding the owners of the property on which these towers are located, and letting them and everyone concerned know that you oppose what they are doing, and explaining why. Get to know what these towers look like, and the chances are you won’t have to look very far to find one. And don’t let that funny looking tree fool you, its actually a poorly disguised cell tower. Those tubular objects on the side of your apartment building or office near the roof? That strange looking smokestack recently placed on top of your building? More cell towers. Microwave radiation from cell towers can pass easily through walls, windows and roofs.
Let’s think about it, if these carriers say there is no danger from these towers, then why would they assemble a tower in less than 2 hours, and then run like a thief in the night? Why would they try to hide them? The way we see it the “get in – get out – and hide” method limits exposure to the public eye, thus creating less publicity for these unsightly and dangerous menaces surrounding us. Time and time again the stories unfold with the same dire circumstances, someone is diagnosed with leukemia, and someone is left pondering the idea as to whether there are any other people in the area diagnosed with the same condition. And with a little investigation, they discover multiple cases of leukemia and cancer in the surrounding area. And all within a mile of one of these cellular towers or a power substation. Educate others on the dangers of cellular towers, and what they can do to prevent them from becoming a part of their backyard, affecting their health, and their way of life!
Wi-Fi systems essentially take small versions of cell phone masts and puts them into the home and classroom – they emit much the same kind of radiation. Though virtually no research has been carried out, campaigners and scientists expect them to cause similar ill-effects from the radiation. We are all now living in a soup of electromagnetic radiation one billion times stronger than the natural fields which our living cells were designed for. This could cause a medical catastrophe in the near future.
Apart from the devastating health effects of cell towers, the day is now approaching in which government mind control technologies will be directed at you, your neighbors, and your loved ones. Every single day, equipment is being erected and installed in this country with the hidden purpose of exerting mind control over the entire population. Everywhere in this country, ELF/microwave transmission (cell phone) towers are being erected. The antennae usually look like four slightly curved vertical plates about 2 to 4 feet in length and located in either 3 or 4 quadrants around the tower, roof, or chimney. Just look around and you’ll see them. And you’ll also notice more of them going up once you begin to pay attention. No one is saying anything, but you’re expected to presume that they’re for cell phones.
Do you really think that we need that much ‘cell phone’ transmission capability? Hardly. These mind control technologies have been in place for a long time. It’s not an accident that the frequency band chosen for cell phone use just happens to match the second order waves that Wilhelm Reich discovered in the late 1940’s to effect thought transmission and allow the mind to be manipulated without the victim realizing it. Reich worked on this project secretly for the CIA for over 5 years, from 1947-1952, until he realized who the CIA was planning to use the mind control on – the American people. He was outraged that he was deceived and used for such a devious motive and swore never to cooperate with the CIA ,NSA, or FDA again.
Reich was murdered in Federal prison in 1957, just a few weeks before he was due to be released, having been in prison for 2 years on a false, trumped up charge of contempt of court. The mind control effects of these transmission frequencies can vary from bringing on sedation, nausea, or emotional and mental confusion. Behind the proliferation of cell phones being hyped upon us, despite their health dangers, there is a hidden motive. And with the rapid proliferation of ELF transmission towers, that motive is abundantly clear. Mass mind control of the population, and the destruction of our health in the process. These microwave emissions from phone masts may become the biggest singular cause of human suffering, and possible premature death, in the years to come.
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