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Archive for the ‘hardware’ Category

VOIP networks must perform all of the same tasks that the PSTN does, in addition to performing a gateway function to the existing public network. There are three major pieces to a VOIP network.

-media gateways/signalling controllers
-media gateways
-voice over IP networks

Media gateways have optional features, such as voice (analog and/or digital) compression, echo cancellation, silence suppression, and statistics gathering.

Typically, each conversation (call) is a single IP session transported by a Real-time Transport Protocol (RTP) that runs over UDP.Their features and services can include some or all of the following.
-Trunking gateways that interface between the telephone network and a IP network.
-Business media gateways that provide a traditional digital PBX interface or an integrated soft PBX interface to a IP network.
-Access media gateways that provide a traditional analog or digital PBX interface to a IP network. Examples include small-scale (enterprise) IP gateways.
-Business media gateways that provide a traditional digital PBX interface or an integrated soft PBX interface to a IP network.
-Discreet IP telephones units.
-Network access servers that can attach a modem to a telephone circuit and provide data access to the Internet.

-Trunking gateways that interface between the telephone network and a IP network.
-Business media gateways that provide a traditional digital PBX interface or an integrated soft PBX interface to a IP network.
-Access media gateways that provide a traditional analog or digital PBX interface to a IP network. Examples include small-scale (enterprise) IP gateways.
-Business media gateways that provide a traditional digital PBX interface or an integrated soft PBX interface to a IP network.
-Discreet IP telephones units.
-Network access servers that can attach a modem to a telephone circuit and provide data access to the Internet.
Media Gateway Controllers
The media gateway controller has the responsibility for some or all of the call signaling coordination, phone number translations, host lookup, resource management, and signaling gateway services to the PSTN (SS7 gateway). Media gateway controllers house the signaling and control services that coordinate the media gateway functions. Media gateway controllers could be considered similar to that of H.323 gatekeepers.The amount of functionality is based on the particular IP enabling products used.

You could use a signaling gateway controller to directly connect to the SS7 network, while also interfacing to voice over IP networks elements. For calls that originate and terminate within the domain of the IP network, only a media gateway controller might be needed to complete calls. In a scalable IP network, you can breakup the role of a controller into signaling gateway controller and media gateway controller.

Knowing the details of how the devices use their suite of protocols is important to designing the IP backbone that is to service the IP elements. The services of these devices are defined by the protocols and software they are running. There are several protocols and implementations that any number of vendors could deploy.

Depending on the IP protocols used, this system as a whole is sometimes referred to as a softswitch architecture.

Jim Francisto
voip service providers

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Although best known for it’s powerful graphics workstations and massive servers, SGI regularly produces related items of high technology. Back in 1998, SGI gave the screen industry a boost by launching the ground breaking 1600SW screen.

The Silicon Graphics 1600SW is a LCD screen with a resolution of 1600×1024. It was, and remains, the only screen to offer a full 16:10 aspect ratio, allowing exact work for computer effects artists, as well as being able to show two A4 pages of text side by side. The 1600SW won several awards for it’s innovative design, and the screen’s brightness and high resolution still places it at the top end of screen design, over a decade later.

The screen used the all digital OpenLDI interface, which required special graphics cards. Several models of SGI machine had the required connector either builtin, or available as an add-in card. Companies like 3D Labs also produced dedicated graphics cards with the special connector, allowing the 1600SW screen to be used with standard PCs.

Since it’s introduction, several companies have also manufactured convertors, allowing modern video cards to be used with the OpenLDI interface. Over a decade after it’s introduction, the SGI 1600SW remains a high quality screen that is very sought after by graphics professionals.

If there were a surefire way you could not only help the planet and economy, but also save your business lots of money, would you not be interested? There are a couple of ways in which you can lower your office expenditure. If you buy compatible HP 2420 Toner then the toner AND the refill become cheaper. Companies can decrease expenses by nearly twenty percent each year without compromising efficiency or quality. You can rest assured that your compatible toner will always work properly because all compatible toner cartridges are held to quality control testing standards. The purchase of compatible HP 2420 Toner not only saves you money, but also gives you the great feeling of knowing you are making a difference in the preservation of natural energy and resources. It’s time to GO GREEN by saving money and helping the planet. Recycled products are more cost-efficient than manufacturing new ones. For example, you can switch to compatible toner and use up to 95% less energy. Using a compatible toner will help decrease the amount of waste and pollution produced. The space waste usage is conserved in the landfills by making less waste compatible toners. You can find a variety of compatible toner companies in the Internet and if you do a little research on them, you’ll be sure to get the best bargain.

By the simple act of buying compatible HP 8500 Toner for your office or home computer you could be helping not only the economy but also the environment all while saving yourself a lot of money. Compatible toner is much less expensive than brand name toner, but it doesnt stop there, purchasing it will also save you money when it comes time for a replacement, all you need to do is refill it! Saving your business up to twenty percent a year sounds amazing right? Well it is easy, all you need to do is change your office to compatible toner! The compatible HP 8500 Toner you buy goes through very rigorous testing. Multiple quality control tests are done to make sure that the toners performance is perfect. By buying compatible toner you will be saving yourself money, but you will also be helping to preserve natural energy and resources. Recycled products take less energy to produce, sometimes up to 95% less energy for a single product! By buying compatible toner you will help to reduce the worlds air pollution, water pollution, and overall waste. Space within landfills is becoming more and more hard to find, so now it is more vital than ever to use recyclable products. You can locate all sorts of deals and sales on the web if you look, make sure to locate the best toner company for you.

When people think of an extra storage device for their computer, they often fail to consider how important a portable hard drive really is. Over the past few years, using a portable hard drive has gained a lot of steam. A portable hard drive is a [simple] convenient | simple [/spin] way to be able to transport your files with you where ever you go. Not to mention, a small drive may save you some day if your main drive goes down, but you took a few minutes to back up your 1,000 song library!

Back up Your Entire Computer With a Portable Hard Drive?

For some people, every file on their computer is precious . If you want to keep all of your files for the long term, should buy and utilize a external hard drive to back up your entire computer. By copying all of the files you have on your normal hard drive, you can have two copies of all of your files. By doing so, you can make sure that even if your computer crashes , you will still have all of your key files, safe and sound. By copying all of your files to an compact external hard drive you are keeping all of your files safe and sound since it is highly unlikely your external drive and your main computer would go bad at the same time. Contrary to what perceptions you may have, portable hard drive capacity as large as 250GB is available in product dimensions as small as 1.0”D x 3.5”W x 5.75”H!

A Portable Hard Drive is Yes, Portable!

One of the major plus sides of a compact USB drive is the portability the device offers. While many external hard drives are easy to carry from one location to another, a small USB drive is even more easily portable, allowing it to literally be carried anywhere with ease, and stored away in just about any type of briefcase or computer bag. It is simple to take the files you need and move them to another family member’s computer or even your work computer. At the end of the day, a portable hard drive is, well, portable .

What Can I Expect to Pay for a Portable Hard Drive?

Price is one of the greatest benefits that a portable compact USB hard drive has to offer. Many people think that they have to go with an larger external hard drive to get the storage they need, and wind up spending more money than they need to for the extra space they may not necessarily need. A portable USB hard drive gives you the option to pay for a smaller amount for storage space. Expect to spend under $20 for about 2GB to 4GB and up to as much as $250 for 250GB. You are saving money by only spending for the storage you need. Again, cost is often significantly lower than a larger external hard drive, primarily because of the lesser amount of storage space.

Until the mid 1990s a portable USB hard drive was a relatively unknown portable storage device that has become the standard today. These little drives can be exceptionally useful to the everyday computer user. While you are aware of the hard drive that sits inside your computer placed there upon assembly, many users may not be aware of the fact that an extra , external hard drive is a great option and can be beneficial in more way than one. If you are looking to buy a USB drive, it is important to look at few certain factors. There are many facets to a USB external drive and understanding each one can help you become more educated before making your purchase.

What Dimensions Are You Looking For?

One of the main things to consider when considering a USB hard drive is the actual dimensions of the drive. The size is not referring to the amount of storage space the drive has, but the actual physical dimensions of the hard drive. Portable hard drives tend to be small , but many can be bigger depending on the manufacturer. If you are looking for something easy to move around and hide , a small capacity drive such as a 6GB USB hard drive may be exactly what you are looking for.

How Big is the Storage Capacity?

Space is arguably the most important thing when looking at USB drives. USB hard drives come in a variety of storage sizes. 4GB USB hard drives and 6GB USB hard drives are often used for those who simply need a small amount of storage. 8GB USB hard drives and 12GB USB hard drives are the hard drives that are used for those who need a little bit more space, and do not want to “under buy,” only to learn they should have purchased more space in the first place.

Are They Easy to Set Up?

Connectivity is a big deal when it comes to USB hard drives. The purpose of having a small portable hard drive in the first place comes from the idea that the device sits outside of your computer, and connects to your computer via one of your computer’s USB ports and work as efficiently as the one inside of your computer. Connectivity simplicity is key, meaning that the hard drive simply connects to the drive through a cable and a USB port or be a self-powered flash drive that easily interfaces to your machine using a USB port.

How Much do I Have to Spend?

The price of a USB hard drive is important of course, but since there are so many options available today you can be sure to find one your like within your price range . Generally, you can purchase a 2GB USB drive for under $10 and you can buy a 250GB drive for a little over $100. USB hard drives are smaller, and often feature lesser storage capacity but capacity has dramatically increased in recent years. Because of the smaller space used, the drives do not cost as much as their larger capacity external hard drive counterparts. The smaller space leads to a lower cost.

Benefits Summary

If you want to save important files, but do not want to spend a lot of money, a USB hard drive is the perfect addition to your computer system. They allow you to copy your information to a second computer (for safety and data loss prevention) without breaking the bank. If you are looking to simply move large files from one computer to another, a USB drive allows you to easily transfer data from one computer to another . Because of the ease of connectivity, any file can be moved easily. Fortunately, you no longer need to go through the hassle of copying files to CDs.

There are certainly a lot of different considerations to look at before purchasing a USB hard drive. The simple set up and variety of size choices, is what makes a portable hard drive more handy than a large external hard drives of the past. The cost is small , and the benefits are seemingly endless when it comes to the ability to back up your favorite family photos . When purchasing a USB hard drive, it is important to take all of these things into consideration. By using this information and thinking about your purchase, you can make sure that you buy one that will meet your needs.

For some, purchasing a compact external hard drive is a fairly simple process. They go to a computer store , look at a USB hard drive that looks to be reasonably priced and make the purchase. Quite often, the packaging is not given a full read as they walk to the checkout counter. While this may work for some people, there are others who desire to know exactly what they are buying purchasing, making their needs are matched by what they have decided to buy. While there are many things that should be evaluated when purchasing a USB portable hard drive or any other type of personal storage device, there are basically five things to keep in mind consider when doing your initial research.

External Hard Drive Space

How much space does an external hard drive have? The price variation with a portable hard drive is directly in proportion to the actually storage capacity of the drive . Some external hard drives have a large amount of space (some now include over 1 terabytes [TB]), while others are designed and priced to a market that is fine with smaller capacity drives, say 100 megabytes (MG) in size.

Speed

The speed of an external hard drive is important in the fact that the faster the drive, the better performance. This performance may reveal itself when you are trying to copy files to the external hard drive, and also may be obvious when trying to simply run files that are loaded onto the portable hard drive device. understanding speed and knowing exactly what the limitations are allows you to make a decision you will be happy with.

Budget

Budget and cost is something that should be reviewed prior when purchasing an external hard drive. Different portable hard drive products have a wide range of prices, this means you may be paying more, or less, than you planned . Depending on storage capacity, you can expect to spend as little as $10 up to over $500. By setting your budget and the price of the product you are considering, you know where you stand, and what brand and capacity might work for you.

Connection

Connection speed is another important aspect of buying an external hard drive. Knowing exactly what your computer can handle , and what connection is needed, will help you to choose the right portable hard drive for you. While most drives work seamlessly with all types of computers, it is always important to check .

Size

The actual physical dimensions of the USB drive is an important consideration for those who are looking to buy an external hard drive. Some people do not want a larger dimension drive if they have a small workspace , while this may not be as much of an issue for others. The size of the actual hard drive and enclosure itself may change with storage capacity, but is usually about the same. In the end, it is all about finding the manufacturer that builds a drive that is the right size for you, your storage needs, is nicely designed, and performs well. For many, drive size is a significant issue. For others, an external hard drive, big or small, will perform what you need it to do.

While this may seem like a lot of research points for a basic functioning external hard drive, it is all part of the purchase process . Trying to find the perfect external hard drive is not only about knowing what you need, but also knowing what each product has to offer. By taking a little bit of time to do some homework, you will begin to understand better which one will make sense to buy and suit your computing needs.

When it comes to computer files , many people are content with their current way of managing files, and see no need for a compact external hard drive. They simply save their files onto their computer, and consider it safe. What many people do not properly anticipate, however, is that their present storage and backup system is not a way to properly prevent data loss. Many users, novice or expert, do not realize that this is a poor way to approach the task until their computer crashes. When the “blue screen of death” appears and they realize they have lost all of their files , this is often the trigger to consider a an extra drive as a solution they should have considered a long time ago. External hard drives have come a long way over the years in terms of smaller size, improved storage and cool features such as push button backup and fingerprint id capability.

There are a seemingly endless supply of circumvent data loss. An external hard drive is just one of the many ways to ensure your favorite photo memories are kept usb hard drive, there are a few key steps that you should consider doing to make sure you [spin] are preventing data loss from ever occurring.

Consistently Back Up Your Files

One of the most important things to do to prevent data loss is to get into the habit of routinely backing up your files. While some people will purchase an external hard drive and simply back up their files one time, and do not realize they should back up their files at least one per week. By routinely backing up your files , you can make sure that there is no single file that is overlooked. The key to data loss prevention is to simply make sure you are consistent with your backup schedule.

Do Not Store Your Documents in One Place

Some individuals will purchase an external hard drive to back up all their files , only to delete those files that they have on their original computer. Many fail to realize that backing up your files requires keeping them in more that one location. Having an external hard drive allows you to have two copies of every important file you need. By having more than one copy of your files, and if one of the two hard drives should go bad, you still have a copy of your data files.

Do Not Keep Your Hard Drives in One Place

Many people who have use an external hard drive will simply station it right next to their computer. While this is a great idea for convenience purposes, this is not a great idea as far as preventing data loss is concerned. Data loss can happen from a computer crashing and a hard drive failing , but can also come from things you might not have ever considered.

If there is flood, smoke or fire damage, keeping your two hard drives in the same location can be a potential disaster. If you do this, both of the hard drives will be damaged, and your files could be lost completely . To prevent this, you should locate your hard drives separately, perhaps not all the time but certainly 50% of the time for safe measure. This may simply mean keeping the extra drive in a fire proof safe or taking it to a different location such as a personal office outside of the home.

An external hard drive is just one of the methods you can use to keep your data safe such as online backup services that are becoming quite popular. By always backing up your files, storing them in different locations and keeping copies, you can be sure you are safe against data loss, which is not a pleasant experience .

Most computers in today’s computing age have an external DVD drive as a built in feature of their computer console. For others, who may have an older computer, may not have a 20X DVD drive. While some users may not feel as though they need one, others wish that had a lightscribe DVD drive, for watching movies or moving and backing up large files. You can add an external DVD drive to basically any computer that has a USB port. There are certain things to look for when purchasing a DVD drive however, as you want to make sure you are making the best decision in terms of price and quality.

Speed

When purchasing a DVD drive, you want to make sure that you are buying something that has the speed to keep up with what you intend to use it for. By checking the speed settings, you know exactly what kind of DVDs can be run on the drive. While any DVD can be read, the faster the speed settings, the faster you can see, and use, what resides on a DVD disk.

Size

An external DVD drive is a DVD drive that is enclosed in hard plastic case to protect the actual drive itself. The protective casing can affect the size of the DVD drive. Some people may be fine with a larger, bulky box sitting on their desk or on top of their computer. Others may desire to have a smaller device. While size may not necessarily affect performance, it can certainly be a factor in your purchasing decision.

Connectivity

When you are purchasing an external DVD drive, the first thing you should check is connectivity. For example, make sure you have an available USB port and an available socket in your wall or surge protector to plug the device into. You need to know your computer’s adaptability in order to understand if the external DVD drive you are buying can connect to your computer. Checking the connectivity is key, as a perfect connection allows you to use an external drive and experience no difference than if you were using a drive that resides inside your computer.

What does an External DVD Drive Cost?

At the end of the day , consumers want to make sure that they are getting . By checking into the prices , you can make sure you are budgeting correctly, and you find the best drive for the best price. Checking the cost can also help you understand what makes sense to spend. One external DVD drive may have a surprisingly high or low depending on the store and model. Some online offers are better than brick and mortar store offers. Expect to pay as little as $60 to as much as $250 depending on features.

Is the Drive Re-Writeable?

Selecting an external DVD drive capable of re-writing, has its advantages. External DVD-RW drives allow you to burn movies and clips to CDs and also allow you to burn simple data to a DVD. DVDs can handle a larger amount of data than normal CD-Rs, meaning you can add more data to a single CD using a DVD drive.

After you have finished your research, narrow your search down to a short list of products and manufacturers that offer precisely what you are looking for. Once you have done this, you can use price comparison to figure out which external DVD drive you would like to purchase. By taking a little time to do some product research, you can be almost sure you will be satisfied with your purchase.

The evolution of the external hard drive has changed quite a but since they became available to the consumer marketplace about 25 years ago. Back then, they were very bulky and expensive . External drives are simply a hard drive that resides externally from a computer box. An external drive connecting to a machine via a USB port is referred to as a “USB hard drive.” The purpose of the drive is simply an extra hard drive for computer system that can be disconnected and relocated and reconnected at will. The hard drive is quite versatile for the average user, and has even more uses for those who have very important data files they use for business that need to be accessible at a remote location. There are multiple aspects to an external hard drive, that can affect a purchase decision so let us take a look at a few of them.

Size

An external hard drive takes up only a small amount of space, as their purpose is to sit outside the computer. In terms of physical size, the drives look similar to an external DVD drive that have become popular in recent years. The hard drive within a computer is fairly small and an external hard drive is simply the same hard drive, but has a hard plastic, protective cover is small, you can easily find room for it on your desk. This convenience allows you to take it with you to another location or conceal it if you need to.

Storage Capacity

The storage space is really the biggest factor when looking at an external hard drive. External hard drives are found in a multitude of storage capacities. Those who wish to have a smaller size hard drive can find one that stores 100 gigabytes (GB) and the largest drives are 1 terabyte (TB) in size, which translates into 1,024 gigabytes. Naturally, this is a extraordinarily large amount of storage space that someone would need if they store and edit large movie files. Whatever your storage needs are, you can find an external hard drive that suits your personal situation.

Price

The price of an external hard drive varies widely depending on the storage capacity and brand name. The external hard drives that are smaller in capacity will obviously cost less, while those hard drives that are larger in capacity, say 1TB, will cost more . Expect to pay as little as $10 for a 1GB drive or as much as $600 for a 1TB drive. This cost is always in proportion to the storage capacity.

Ease of Connectivity

One of the biggest benefits of owning an external hard drive is the fact that it is very easy to hook up, turn on and use . The hard drive can be easily connected to nearly any computer. All you have to do is attach the USB cable to any one of your USB ports. Any computer will immediately recognize the hard drive, this means any file on the hard drive can be opened on just about every computer. This connectivity makes it easy to move files from one computer to another, or the ability to back up your favorite family photos.

Benefits

If you need to make a backup your own files, an external hard drive is the way to go. An external hard drive allows you to keep an additional copy of any file you do not want to lose. By having an extra copy and should one of your drives fail, perhaps the key benefit of having an external hard drive.

External hard drives are the simplest way to move or store your files. While CDs and DVDs, and even Blu ray discs can hold a lot of information , the CDs may easily become damaged and unusable. The casing that surrounds an external hard drive will keep the drive safe, from potential external hazards. External drives are a must for anyone who owns a PC.