Archive for the ‘Communication’ Category
Amazing Communications
November 28th, 2009
As history has progressed and technology has continued to advance, life has become full of more and more good things. Without a doubt, one of the best things that our society has gained from the advances of technology is communications.
Consider for a few moments all of the amazing forms of communications that have made your life easier and more full. First and foremost in many peoples minds is the telephone. Even if you like to write letters once in a while, can you honestly imagine if letter writing and telegrams were the only way to communicate with people? Think of the countless ways that having phones have improved worldwide communications. My telephone allows me not only to call my next-door neighbor but the communications a telephone allows also enables me to call a friend who has moved to Africa in just a few moments time.
If having the telephone doesn’t impress you enough, think about the way the internet has improved communications and many other aspects of your life. The internet has literally connected people from every corner of the globe by the simple click of a button or two. Our communications with people have become easier, more frequent, and faster. You can send a message to a business parter in Tokyo and receive a reply within mere seconds. Amazing.
The improvements in communications have opened up a world of possibiility to people in the area of travel. Places that were once impossible to reach are now not only possible to reach but also convenient and quick. Each time I sit in an airport I find myself amazing by the incredible communications system that keeps air traffic in control around the world. I can definitely see how an air traffic controller is the most stressful job in the world, but there is no way the job would even be possible without the intricate communications system we have to use. Read the rest of this entry »
Analog vs Digital Satellite Tv Receivers
November 20th, 2009
In today’s world, communications are of utmost importance, there is absolutely no doubt about that. Satellite tv is one of the technological breakthroughs of the 20th century. Made possible because of the massive satellite fleets deployed by different companies and with different purposes, satellite tv has in a way revolutionized communications.
The communications satellites of different companies relay on an increasingly diverse range of TV programming. And when it comes to the options you have for your satellite tv receiver, this will greatly depend on the very nature of the satellite tv service you desire to view. There are satellite tv programs which are (FTA). FTA is an abbreviation from “free to air”. However, there are other satellite tv services which are encrypted, and are only available to subscribers of various satellite tv companies.
Another important distinction must also be made between satellite tv services which are analog and those which are digital. The analog services are based on electromagnetic waves that vary in their frequency. I am sure you have heard of the term FM, which is short for frequency modulation. Also, analogue transmissions can vary in intensity. In the latter case, the process is called amplitude modulation, or AM.
But digital signals are a different story entirely. And yes, we have entered in the digital age, where everything is made up from many 0s and 1s. This is also how a digital signal is broadcast, in a series of binary digits called bits. 1 means on, 0 means off, and this is how information is actually transmitted to the computer circuitry.
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How does LDAP work
October 4th, 2009
Lightweight Directory Access Protocol or LDAP is a TCP/IP-based Internet protocol used by email programs and a few other applications to search and fetch information from a directory stored on a server. A directory is a data repository storing identical chunks of information in a hierarchical and logical sequence.
For instance, a telephone directory that has various subscriber names indexed alphabetically with associated telephone numbers and addresses is an example of a directory. This kind of a structure can easily be implemented using LDAP. However, this protocol is not limited to accessing just contact information about people. It can locate shared resources on a network like printers and scanners, and allow people to use the resources and other shared services using a single password.
LDAP can be successfully implemented where identical forms of sequentially stored information need to be accessed quickly and where updates are done very rarely. Email clients frequently use LDAP to access directory information from a server. Since LDAP does not support encryption, processes like updating and modifying information on the server from the client needs to be done using a secure SSL connection.
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Choosing a Cb Radio
September 16th, 2009
What primarily differentiates CB radios from each other is their features, not their output strength. CB radios come with a number of features, the most popular of which we’ve outlined below:
Squelch Control – This control sets the break-point at which a CB radio outputs a signal. In effect, it keeps the operator from constantly having to listen to static and only activates the speaker when a transmission is received. This is a standard feature and is included with nearly every CB radio sold.
RF Gain – Allows the operator to filter the type of transmission a CB radio receives based on signal strength. It’s useful to block out faint transmissions to eliminate background noise when talking with someone with a strong signal. This feature can also be used to pull-in and better hear weak signals.
PA Capability – Allows use of the CB radio and microphone as a transmitter for a public address system. This requires a PA horn (usually not included) that can be mounted under the hood or on top of the vehicle.
Automatic Noise Limited (ANL) – Filters out static, engine noise and other interference from the reception signal to improve reception sound quality.
Weather Capabilities -CB radios with this feature have the ability to access local NOAA radio stations for real-time weather reports and updates.
Instant Channel 9 & 19 – The ability to quickly jump to two of the most popular channels: Channel 9 (Emergency) and Channel 19 (Highway / Truckers).
Nightwatch and/or Backlit Displays – A number of higher priced models include a backlit radio display for convenient operation at night. This is an invaluable feature if a radio will be used extensively at night or in dark conditions. ?
When choosing a CB radio and its corresponding features, it’s important to focus on how and where the CB will be used. Specific vehicle owners tend to want different features in a CB radio:
Tractor Trailers & Large Trucks: Professional drivers tend to want full-featured CB radio as they are a crucial communication tool on the road. As such, a good after-market radio “peak and tune” to boost performance is often important. The Cobra 29 LTD series is one of the most popular CB radios among professional drivers. Read the rest of this entry »