Cordless phone is a portable phone that gives you the freedom to talk over the phone when you are moving in your house or around the house. Basically, cordless phone works like a standard phone, but it has more advantages in comparison to the standard phone. If we talk about the history, then George Sweigert is said to be the father of the cordless phone. He was awarded with a patent for 'full duplex wireless communications apparatus' in 1969. But the first cordless phone came into view in 1980s.

Frequency of initial cordless phones was 27 MHz, but they used to face certain problems like narrow range, inferior sound quality and risk of security breach. Later in 1986, FCC approved for 47 - 49 MHz frequency range and in 1990, 900 MHz frequency range was granted. After that cordless phones became quite popular. In 1994, the first digital cordless phones were launched with a frequency of 900 MHz. FCC granted 2.4 GHz range for the cordless phones in 1994.

A cordless phone has two basic components i.e. base and handset. Regular phone jack is affixed to the base like a standard phone wire connection. It receives the electrical signal for the incoming calls and then transmits that signal to the handset. The handset transfers that signal to the speaker and you hear the sound or voice of the person who is calling. It transmits your voice into signal and sends it back to the base.

The base turns the received signal into an electrical signal and sends it across to the person on the other side via phone line. The whole process performs so rapidly that you hardly face any delay in the transmission of the signals.

The transmission of the signals is based on the duplex frequency which is a combination of the frequency between the handset and the base that allows you to talk on the phone. The base of the cordless phone is plugged into the electricity switch and the handset consists of a rechargeable battery which gets charged when the handset is put on the base.

In order to understand the working of the cordless phone, you need to comprehend the anatomy of the cordless phone in detail. The base is plugged into the telephone jack. It contains phone line interface that is responsible to send and receive signals via phone line. There is a radio that strengthens the signals to and from phone line interface, speaker phone and user controls. The power supply provides low voltage power to the circuits and recharges the battery of the headset.

Besides these components, there are audio amplifiers that enable you to talk hands free, keypads to dial the destination number, LCDs as to display the caller's identity, LED indicators that enable you to dial the number in dim light or complete darkness and solid state memory that assist in functioning of answering machine and call back facility.

The handset is a wireless device and you can carry it with you wherever you want, within the provided range of the transmitter of the base. It also has a microphone, speaker, dialing keypad and an equipment of a FM radio transmitter and receiver. A buzzer or ringer rings when there is an incoming call. The LCD displays the caller's identity. The LED lighting enables you to dial the destination number in dim light or in complete darkness. The handset is able to function due to the electrical supply by the rechargeable battery which gets recharged every time when the handset is kept on the base.

There is a variety of models available offering different features in the cordless phones. Initially the cordless phones were quite expensive. But with the ever growing competition, there is a big slash in the prices. Analog cordless phones are less expensive than the digital ones. When you shop for the cordless phone, buy one that meets all you needs. Give security the first preference. Consider the frequency it offers and the battery it contains.

Roberto Sedycias works as IT consultant for Polomercantil

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Are you receiving repeated calls from an unknown number? You have a phone number and need to find out who is behind these phone calls. Luckily, there a quick and easy solutions to solve this problem.

One of the first things you can do is to use a search engine such as Google. Other people online often come across the same calls from the same number. It is not a very useful strategy when you suspect the phone number is coming from a cell phone but can be useful to find out if the number is coming from a telemarketer or business phone.

Another strategy is to use free online directories such as 411.com, Anywho.com or the Whitepages.com. The problem with using these directories is that they only show information from numbers from landlines.

Yet another option is to use a paid cell phone directory if you are certain that it comes from a cell phone number. Most people have to subscribe to more than one directory to get the results they desire making it a time-consuming and expensive task. The directories are often poorly updated and not comprehensive.

In my opinion, the best option is to use a reverse phone number lookup. Simply, submit a phone number and an instant report will appear showing you the name, address, carrier, and phone connection status of the person. Reverse lookup phone number services are more comprehensive and updated more frequently than other online directories.

There are many reverse lookup phone number services out there. How do you choose the best one?

We've compiled a review of the best reverse lookup phone number services out there.

Troy H. is a telecommunications enthusiast and has reviewed several of the best Reverse Phone Call services on the internet.

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Millions of ring tones are available these days ranging from melodious sound of popular singers to crass cacophonies according to the tastes of the users. One would really be amazed to know the wide variety of ring tones available. Ring tones have come a long way from a humble beginning in Finland in 2001

If one analysis the evolution of ring tones systematically, one has to go back to the earliest form of ringtone which was commercially sold in RTTTL (Ring Tone Text Transfer Language) format. A text based format was used in creating musical sounds. The monophonic ring tone which was available in 2001, in Finland was based on RTTTL. It was so simple that it produced only one sound at a time. A special sequential arrangement of notes of various frequencies was made here.

The much sophisticated sort of ring tone which followed are called the Polyphonic ringtones. It was really a welcome change for users since 16 different sounds could be produced at one time. People could enjoy the musical quality of the ring tones to their hearts' delight. This can be considered as the second generation. It started becoming popular in 2002, primarily due to the fact that the encoded sequences contained instrumental tones.

The new type of ringtones based on audio formats MP3, AAC and WMA which followed is called True tones. This type offered superiority of sound quality and came to be known as Master tone or Real tone. The wide variety they offered was also amazing. The popularity they received is a proof to the fact that they have really lived up to their name.

With the introduction of True tones people became attracted towards it resulting in the beginning of a new business -he ring tone business. Customizations and innovations became the order of the day tempting people, especially teenagers. This situation was encashed by some business minded people. The result was a billion dollar industry catering to the imagination of every individual as far as the matters of ring tones are concerned.

These days one can notice that ring tones have become cheaper. This is mainly because of the huge volumes involved. Today ring tones represent the identity, personality, taste and character of the user. Some find it a mode of self expression. Some are of the view that it is purely for enjoyment.

It was at this juncture that some third party businesses like InfoSpace entered the scene. They made Monophonic and Polyphonic ring tones standardized for each handset. Interactions with customers were there for distribution and billing. Any way, middle men were cut off from the field with the advent of True tones. These days their own songs are manufactured by all manufacturers. Now the business has grown in leaps and bounds that sometimes tones for mobile phones are published even before the album sees daylight. Music companies earn a lot through this business.

Another ring tone which caught the attention of people from different walks of life is Crazy Frog tone. The history of ringtones can be concluded with this, which happened in the year 2004. It is true that the sound was a bit annoying. But the fact that it was different from other tunes helped it to get wider publicity. This can be avouched from the fact that the company called Jamster, which marketed the tone rose up to number one position leaving behind all its competitors.

If you want to know more about Mobile Ringtone then feel free to visit Ring Tone.

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