Accelerator products can help enterprises a lot in addressing the performance requirements of all enterprise applications including voip. First, Accelerators change the economics of wide area networking by squeezing an average of 100% - 400% more bandwidth with peaks of 1000% depending on traffic mix. This frees up link bandwidth to support high quality IP services - and it does it without expensive WAN upgrades.

It is also worthy to note that Accelerators do not actually use lossy compression schemes that might degrade voice quality and they add less than one millisecond of latency. In fact, the Accelerator’s compression actually reduces end-to-end latency by reducing serialization delays on WAN links. For example, it takes 125 ms to serialize a 1,000 byte packet on a 64 kbps link, but if an Accelerator increases the effective bandwidth by 4X to 256 kbps, the serialization delay is reduced by a factor of four to 31 ms. The following formula can be used to calculate the serialization delay for any combination of packet size and link speed:

Packet Size (in bytes) x 8 / Speed (in kbps) = Serialization Delay (in ms)

In addition to freeing up the bandwidth normally consumed by data applications, Accelerators are able to reduce WAN bandwidth requirements for different voip codecs. In fact, tests have shown that Accelerators reduced G.711 bandwidth requirements by 20% and G.729 by 70%. As a result, WAN links can carry more simultaneous voice calls and the performance of other applications may also be improved.

Accelerators solve increased jitter and latency caused by large data packets over slow WAN links by fragmenting large data packets and injecting voip packets at regular intervals. This feature allows voip and data to co-exist even on branch office WAN links. For example, normally, a voice over IP packet “stuck” behind a 1,500 byte packet on a 64kbps lin will be delayed by 188ms.

Using the Accelerator’s packet fragmentation will result in the data packet being reduced in size (accelerated - say from 1500 bytes to 500b bytes) and then fragmented into smaller data packets (say - 2 packets of 250 bytes each). In this case, the latency for the voip packet will go down from 188 ms to 31ms! In addition to increasing WAN capacity for both data and voip while reducing latency and jitter, Accelerators also manage WAN bandwidth to ensure that critical applications like voip get the bandwidth they need.

Accelerators include an Instant QoS feature that prioritizes application access to WAN bandwidth. Without such priorization, the additional effective bandwidth provided by Accelerators could be consumed by aggressive, non-critical applications such as file sharing. Accelerator’s AppView feature provides graphical visibility for all application traffic sharing a link. AppView can be used to monitor WAN utilization and to plan future capacity requirements.

And finally, voip accelerators have a set of data integrity features that are designed to stop the packet loss that can degrade voice quality. A flow control mechanism reduces packet loss caused by link congestion and a packet recovery feature ensures that any lost packets are transparently recovered at the link level before they can cause voice quality problems.

Jim Francisto

Businesses can save on costs if they shift their telecommunications needs and migrate to T1 line instead of the ordinary phone lines, and their DSL connection to the Internet. Technology is expanding almost everyday, and moving your business to T1 is the first step to keeping up.

If you have about 8 or more existing phone lines for your business and you are spending around $800 monthly just for these voice lines, you are better off using business T1 lines. You will have a more efficient and more reliable non-stop Internet connection and at the same time clearer reception on your voice lines.

More and more companies are using T1 internet connection for their businesses because the technology allows everyone in their organizations to consistently communicate with each other and with their business partners. They are also able to become more productive online since a T1 broadband connection is definitely much faster than a dial-up, and more dedicated than a DSL.

A T1 line uses fiber optic technology that can handle more data than the traditional phone lines that are made of copper wires. There are T1 lines that are made from copper too, but most installations are now fiber optic or metro Ethernet based.

Companies with T1 lines have leased the connecting line from the phone company to the office. A T1 line is able to handle 24 digitized voice channels or about 1.544 megabits per second of data. Compared to a regular modem, a T1 line allows data stream of about 192,000 bytes per second - that is about 60 times more 0’s and 1’s running through. That means you have a more reliable system than the rugged analog modem you’re using currently.

T1 lines are also known as DS1 lines. This is the popular choice among businesses these days if they want to connect to their Internet Service Providers or ISPs. It’s a dedicated setup so users can experience no delays whatsoever except if for example, all 100 computers are downloading huge videos at the same time. But that is just the worst scenario, and it is rare (almost non-existent) in an office setup.

Finally, T1 lines will expand easily as your business grows and allow you to take advantage of voice-over-internet-protocol (VoIP) advancements that are coming very soon. The truth is that these days, T1 lines for business are not that expensive when compared to the return on investment you get in enhanced security and productivity.

Voip sends your phone call through the Internet
A Voip router is a very small device that is used by the majority of Voip users to make calls over the Internet. One of the main differences between traditional telephones and Voip is that traditional phone signals are analogue and are sent physically through wires. Voice over IP sends a digital signal and sends it as packet data through the Internet. Therefore, for a person to continue to use the same phone that they have always used for voice over IP calls, they need a device to convert their analogue signal to a digital signal. This is what the Voip router is designed to do.

Voip technology is advancing rapidly
Digital phones allow Voip users to plug directly into their Internet connection or their computer to make telephone calls, thus eliminating the need for a router. Furthermore, it will only be a matter of time before our homes are fully networked for Internet access in every room, thus making IP calls easier and the delivery of other services that will soon be provided through the Internet.

Make your move to Voip as soon as possible
Voip is the telephony of the future. This is indicated by how the large traditional phone companies have all converted over to this technology. What you can expect with a switch to Voip is much lower telephone bills and the closest communication with long-distance family members and loved ones than you have ever known. When they say that the world is getting smaller, it can now truly be seen.

Voip is easy
Although many people fear new technologies or are slow to convert over to a new way of doing things because they are so comfortable with the old, Internet phone calls is something that you should switch over to without hesitation. Of course, the voice over IP provider that you choose to work with is your decision. Just understand that any switch to Voip is better than not switching. For those that hate new devices and new gadgets, a Voip router makes everything so simple and easy to use. Basically, a Voip router will have a socket for you to plug your phone into and another socket for you to plug your internet connection in to. Once you plug in those two things, you will never have to think about your VoIP router again. Now, that is simplicity!

Jim Francisto

Voip hardware are available from many carriers and range from simple vop phones to complex routers and controllers. VoIP is not really a new concept and is now available on the market for many years, it’s no more in testing mode. People don’t know that much about a Voip solutions. What are they, how do they work? Here is some information that can help.

Voip solutions can be classified in three general categories:
<ul> <li>end stations (such as phones), </li> <li>and controllers.</li> <li>gateways and routers, </li> </ul>

Like everything else in the IT domain, every category has a specific function that it performs. And if you combine all the functions you will get a complete VoIP system.

VoIP controllers
VoIP controllers, also called IP PBXs, manage the VoIP network. IP PBX controllers are PC-based, running a standard OS (such as Microsoft Windows, Linux or Sun Solaris, but very different) with additional software to control the VoIP systems. Plus they are performing all the functions of a traditional PBX. These systems can provide APIs to extend vendor-provided or user-written features and functionality.

Hardware and software vop phones
There are two types of vop phones: hardware and software.
<ul> <li> A hardware phone is a physical device, very similar to your common phone; it has a handset, dialpad, etc. The only thing that is different from your ordinary phone is that it connects to an Ethernet network rather than a telephone network. vop phones are built with all the necessary hardware (and software) to digitize your voice (i.e., codecs) as well as setup and make calls (i.e., signaling and transport). <li> Software-only phones, or “soft” phones, use the PC’s capabilities to communicate with other PC’s over the Internet, by using the PC’s sound card, CPU and network card as part of the phone’s hardware, and thus, enable a PC to become an IP phone. </ul>

VoIP gateway
With so many options available today, gateways are also capable of transcoding (changing the signal from one codec version to another so that the voip device can communicate with the rest of the network). A VoIP gateway is a voip device that connects the VoIP network to your public telephone network (PSTN). For example, a gateway uses G.729 codec, while your PTSN network uses a G.711 codec.

VoIP Routers
Routers are inter-network equipments that help a LAN connect to a WAN; therefore the router’s capability to ensure correctly handled high-priority traffic is very important. Since WAN speeds have generally less bandwidth than a LAN, proper packet queuing and priorization is in order to ensure good voice quality across the path.

Jim Francisto
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The Millionaire Mavericks

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