Richard Meyers asked:


Nokia is one of the most popular mobile phones manufacturers throughout the world. They have range of plenty and different mobile phones that can easily cater all needs of mobile phone users. The latest N-series Nokia phones called as multimedia computers are a perfect blend of fashion and functionality.

Nokia enhances people’s lives by providing easy to use mobile phones. Nokia is world’s leader in mobile communications and the latest Nokia phones have made 3G a reality for growing number of people. The Nokia N73 has two strengths voice and video calling with an excellent loudspeaker and good Bluetooth headset connectivity.

Anyone purchase drugs online who has had experience with Nokia mobile phones can tell you that most of them are very simple to use even for someone who is buying his or her first mobile phone. The menus are easy to use and the phones are of reasonable quality. Some of the Nokia mobile phones do have some features that take time to undo such as turning on automatic editing for text messaging-this prevents the user from typing in a text message and can be quite frustrating until you learn how to turn it off.

Nokia mobile phones are available from everyone mobile phone provider though the selection may vary. Some Nokia mobile phones are manufactured for specific providers, so you may not always find the exact model you want from your provider. This is not just something with Nokia but other manufacturers as well. You can try buying an unlocked phone to get the exact one you want, but some of the features may not be available through your provider.

Roberto Sedycias asked:


A cordless telephone (telefone sem fio) is an electronic telephone that comprises of a wireless handset and a base unit. Communication is carried out between the handset and the base using radio waves. The wireless handset can be operated only within a fixed range from its base unit. The range of operation is generally within 100 meters. The base unit needs electricity to power it. Batteries are used to power the cordless handset. Placing the cordless handset in the cradle in the base unit recharges these batteries. A period of 12 to 24 hours is required for recharging the batteries.

With features like cell handover, data transfer and international roaming (on a limited scale), the once clear-cut line between mobile telephones and cordless telephones (telefone sem fio) has now been blended by the modern cordless telephone standards.

Frequency bands have been assigned in each country for cordless telephones (telefone sem fio). Advertisements by manufacturers claiming that there is an improvement in audio range and quality with higher frequency are a common sight. But that is not the case. Actually, higher frequencies have been seen to exhibit worse propagation in ideal case. There is also a tendency for the path loss to increase with higher frequencies. Locally varying factors such as antenna quality, signal strength, the modulation method being used and interference are more influential than other factors.

With Landline telephones working on a bandwidth of about 3.6 kHz (a small fraction of the frequency that a human ear can interpret), the transfer of audio is carried out with an audio quality that is just enough for the parties to communicate each other. Because of this limitation in the design of the phone system itself, it is not possible to improve the audio quality beyond a particular limit in cordless telephones.

Most of the good-quality cordless telephones (telefone sem fio) try transferring the audio signal with lowest possible interference and greatest possible range. Even the best of the cordless telephones fail to match the audio quality that a high quality phone wired to a good telephone line provides.

Sidetone (echo of voice heard in the speaker of the receiver), disturbing constant background noise that is due to the cordless system, and inability to obtain a full frequency response that is available in a wired phone are few of the reasons for a not-so-good audio quality. Rare exceptions, obviously, always exist that sound unbelievably similar to a wired telephone. But even these are considered as `fluke` by most industry standards.

Higher frequency is now being used in other home products like the microwave oven, Baby monitor, Bluetooth, wireless LAN, etc. Thus, cordless telephones (telefone sem fio) using higher frequency may face interference from signals from these devices.

Eavesdropping is a constant security threat for analog telephones. Any one with a radio scanner and within range can pick up these signals and listen to conversations. Modern digital technology is thus being used to take care of this kind of unauthorized access.

DSS (Digital Spread Spectrum) makes use of frequency hopping, i.e. spreading up of audio signal over a wider range in a pseudorandom fashion. DSS signal sounds like noise bursts to a radio scanner or any other cheap drugs no prescription analog receiver. This signal makes sense only to that base unit which has the same pseudorandom number generator as the cordless handset. Each time the cordless handset is returned to its cradle, a new unique generator is chosen from thousands of options.

DSS generates a signal spread that leads to a kind of redundancy, which gives rise to increased signal-to-noise ratio. It also leads to increase in signal range and decreases interference susceptibility. It is easier to use this kind of wide-bandwidth security option with higher frequency.

This article is under GNU FDL license and can be distributed without any previous authorization from the author. However the author’s name and all the URLs (links) mentioned in the article and biography must be kept.

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TheMarkSteele asked:

Dr Lektroluv playing a good early evening set in the dance tent. Within 2 hours the sun was down and this tent was packed. The rest is, as they say, history!! This nut bag is from Belgian. He mixes using a telephone handset ! My bare top dubstepper friend, Shaun, can be seen and heard…..Hoye de hoye de hoye….hoye hoye hoye !!! … man hop farm festival dance tent of dr lektroluv rave house