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In the beginning, when the Internet Protocol was first designed, no one was thinking about the possibilities of sending audio and video. Real time communication was not an issue.

Perhaps the greatest single problem is that the Internet Protocol (the IP part of VoIP - Voice over Internet Protocol) wasn't designed to ensure that the packets are delivered in the correct order. When information is transmitted using IP, the data is broken up into information packets, each of which is sent separately. The correct sequence of packets is part of the information in each packet, but nothing specifically exists to make sure that the packets are delivered, and, therefore, received in the proper order.

Now this isn't usually a significant issue for web pages, email, etc. Why? Because these aren't real-time applications. Audio and video however, especially live audio and live video are definitely real-time applications. For a real time conversation to work, the packets have to arrive - pretty much in order and also within certain time limits.

The first, and one of the major challenges then, is to restructure incoming packets into the correct order and to somehow cope with lost and/or trashed packets. Face it, the internet does not provide a quality of service guarantee. If enough packets are lost, an audio or video stream rapidly turns into a useless mess. While packets can be resent - the standard way lost/trashed packets are dealt with - real time communication means that you just can't wait around forever. After a certain time, it's simply too late to maintain a coherent stream.

What we've seen over the last few years is a gradual and now nearly explosive growth in the use of VoIP, and streaming audio and video. The reason is decline of dial-up and the growth of ISDN, DSL, ADSL, cable and other high speed, high bandwidth access modes. Bandwidth is the answer to most of the problems posed by IP. End-to-end high speed links can ensure high quality sound. The sole remaining problem is latency.

For most this is not an issue when they have high speed internet access, however, it can become a problem with satellite links or any other system where unusually long distances and many hops are involved.

On private networks, there is rarely a problem using VoIP and many companies with internal networks (such as telcos and power companies) use VoIP to communicate within their organizational network structure.

However, when the available end-to-end bandwidth is less than 256 Kbps, a good VoIP system will require mechanisms to overcome fragmentation of the data stream.

Security is an issue everywhere on the internet and what this means is that VoIP also needs to deal with firewalls and NATs (Network Address Translation). While some systems can do NAT and firewall traversal on their own, others require the use of SBCs (Session Border Controllers) to manage the traversal.

One major, though non-technical, challenge to VoIP, comes from traditional telephone service providers who are being by-passed by consumers who love the extremely low (or zero) long-distance charges they can get by using VoIP. Exactly how this works out over the long run will be fascinating to watch. In the meantime, VoIP services are continually being improved and extended. Enjoy them.

For more information on VoIP, conference calling, web conferencing and related subjects visit Alta Global Telecom. Find more on wireless and cellular subjects at Alta Global Wireless. For networking and security check Alta Global Net.

You may be looking forward to buying a home in Georgia, one of the most upcoming states in the United States. Georgia has unlimited potentialities and is an excellent place to live in. to date, numerous people are relocating to Georgia to reap the benefits.

An important thing is knowledge. You need to educate yourself on Georgia mortgage loans before you set out on your endeavor. Georgia mortgage loan rates are going north. In fact, the rates have crept more than 10 times over the past three years and are still climbing. Hence, if you are planning to relocate to Georgia and buying a home there, this is the appropriate time before mortgage loans become too costly.

The easiest way to search for Georgia mortgage loans is through the Internet. Today, thanks to the internet, you can find information about Georgia mortgage loans, about various lenders and banks offering Georgia mortgage loans, and more. You can even compare Georgia mortgage loans offered by various banks and private lenders.

Start looking for a lender online. You will find numerous lenders offering Georgia mortgage loans. The state of Georgia has some strict rules laid down. Only minor differences exist, which, however can still make a huge difference especially when the huge cost of real estate is involved.

A favorable idea is to select your lender for Georgia mortgage loan is to shortlist a number of lenders and compare what they are offering. Visit www.castlemortgagegroup.com to find out the lowest interest rates in your area as well as the various mortgage options available to you. Get at least four quotes and dont settle simply for the lowest rate: you may be able to get an even lower one with a little bit of negotiation on your part.

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Whether you are planning a DIY painting project on the interior or exterior of your home, you will want to be prepared for every aspect that the job will have to offer. First off, you will want to wear comfortable clothes that allow for ease of movement. Flexible shoes are a must, but they should also have good traction for when you climb on and off of the ladder used to reach those high spaces.

If your DIY painting project involves the interior of your home, you will want to make sure that each room is well ventilated with windows open and as much air circulating as possible. Some individuals can have a very negative reaction to paint, so be very mindful of any noticeable changes in health as you paint.

When working on a DIY painting project on the interior of your home, always make sure to cover all furniture and carpet with plastic in order to avoid paint splashing or coming into contact with a surface that it was not intended for. You may also want to place tape along the border of your walls to ensure a clean stopping point for the paint. If, for example, your wall features decorative wood strips, you will not want to paint over these. By placing a piece of tape in a way that the paint will evenly stop at the point the strip begins, your DIY painting job will be much easier.

If you arent sure what color you want to use for your DIY painting project, most home improvement stores offer convenient paint samples that allow you to view a variety of colors on painting tiles. This will give you an accurate idea as to how your DIY painting project will look once it is completed. Select stores may provide you with small paint samples to take home with you, but almost every one will offer an in-store display of finished samples.

One of the most important tips to completing a DIY painting project is to read the instructions carefully before mixing your paint. Read the manufacturers recommendations and/or any accompanying warning label regarding the paint and its use.

If you are painting the exterior of your home, ventilation will not be as much of a problem because you will be using the paint outdoors. The most common tips to exterior DIY painting is to take extra care when securing the ladder, climbing up or down it and always wear protective gloves to keep the paint off of your hands.

Find all types of home improvement contractors who specialize at installing carpet, doors, siding, roofing and much more. If you are a home improvement contractor or an author of home improvement articles, add your site or articles today.

The availability of sports betting on the Internet has revolutionized the way people are able to enjoy gambling on everything from team sports like football and basketball to NASCAR and horse racing. A good example is online baseball betting. You can now go to an online baseball betting site and find out the latest about the betting odds and betting lines for each game and baseball series. You can research teams and players and make your bets from the comfort of your own home or any other location you choose.

With online baseball betting you dont have to carry cash around to place your bets. There are a wide variety of options available such as making deposits to the sportsbook with credit or debit cards. The best online baseball betting sites will guarantee that you have a secure account with them. All that you have to do is register and start betting. However, more is usually offered by a good sportsbook. You can improve your odds of winning by looking at the inside information provided by the sites and the experts making the recommendations.

There is a lot of data available for you to use to do your online baseball betting. You can find out about pitching match ups for upcoming games and how well teams are playing at home and on the road. You can learn about injuries to key players and who is in a batting slump. With this type of information you can place the smart bets that increase your odds of winning. After all, isnt winning what sports betting is all about?

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