Download Cut the cord! : the consumer's guide to VoIP by Jerri L. Ledford PDF

By Jerri L. Ledford

Phones have really develop into a vital part of our day-by-day lives, serving as our conversation lifeline to the area. besides the fact that, there were only a few advances within the easy know-how of mobilephone carrier - beforehand. Voice over web Protocol (VoIP) bargains shoppers an economical substitute to conventional cell carrier. "Cut the twine! The Consumer's advisor to VoIP" delivers the information you must make a decision if VoIP is correct for you. It deals assistance for choosing a VoIP provider and recommendation for developing your new provider. it truly is filled with checklists, site assets, counsel, and notes, or even offers examples of prone for you to try out prior to committing to VoIP.

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Extra resources for Cut the cord! : the consumer's guide to VoIP

Example text

For VoIP, the ordering mechanism is controlled by CODECs, which are compression/decompression algorithms that divide voice data into packets and encode the packets with sequencing information. In this manner, packets can arrive at the destination out of order but the conversation will still be coherent because the packets are decoded in order, regardless of how they were received. VoIP CODECs makes that “perfect” reassembly possible. At the receiving end the person you are calling hears your voice, just as if you were calling that person from a landline telephone.

Chapter 3 • Why Go VoIP? If you tried early VoIP that leveraged dial-up Internet access, you know exactly what these calls sound like. Small delays in the delivery of data packets go unnoticed in other IP applications, such as chat or e-mail, but those same delays in VoIP make calls unbearably low-quality. Today, however, advances in technology have yielded prioritizing schemes that rate the priority of data packets and place voice packets ahead of all others. These prioritizing schemes act like a crossing guard, stopping the flow of traffic so that children can cross the street.

But with VoIP, your call is broken into packets of information that are sent via the Internet, in a format called packet switching. Millions of these packets of information are traveling across the Web at any given time. The result is that more calls can travel along the same space, making VoIP more efficient and cost effective than POTS. Note There’s an excellent demonstration of packet switching on the PBS Web site. html. Chapter 3 • Why Go VoIP? 1 In circuit switching, each line is dedicated to transporting only one type of information at any given time.

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