VoIP - What is the Problem?
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.
MORE RESOURCES:
Delayed quote dataMarketWatch - Nov 19, 2008... designing, selling, and implementing converged Voice over IP (VoIP), data, video, and wireless (Wi-Fi) business communications systems. ... |
voice over ip voip - Google News
|
 |
|
|
RELATED ARTICLES
How Voip Can Mask The Size Of Your Business And Save You A Bundle
Have you heard the buzz about VOIP (Voice Over Internt Protocol)? Basically, it's like communicating over the phone without a phone. Instead you plug your microphone into your computer log on to a website and "boom" you're talking baby.
The Single Most Important Thing to Know About Computer Phones (VoIP)
Over 90% of computer phones (VoIP) are not secure because they use a public known codex (publicly known encryption of sound packets) and a publicly known protocol to transport voice conversations. Therefore, users of these type of services are unknowingly exposing themselves to anyone who wants to listen in or access their confidential information.
The Future of Communications - Voice Over Internet
When was the last time that you were able to make along-distance call for free? If you said "never", youprobably have not been introduced to VOIP or VoiceOver Internet Protocol. But, is this new technology asefficient as its counterpart, analog telephoneservice?Since the demand for world-wide communication hasgrown, the internet has become the most popular way ofcommunicating.
Benefits of VoIP
You may not have considered it but there are many benefits that businesses can achieve by utilising data networks to carry their voice traffic (VoIP). By marrying this voice traffic with data traffic (IP Telephony) it becomes even more powerful.
Take Your Home or Business Phone With You When You Travel
Voice Over Internet Protocol (VoIP) telephone service uses a broadband Internet connection (DSL or cable) instead of the Bell System circuits to carry your voice to any telephone in the world via the Internet. If you're not familiar with VoIP phone service, you'll be interested in this new technology that's giving traditional phone companies a run for their money.
Take Advantage of Internet Phone Calls (VOIP)
Voice Over IP (VOIP) is a relatively new technology. Voice Over IP allows people to leave behind the old and very traditional analogue phone networks and now adapt in favor of the very new and very progressive Internet-based calling system infrastructure.
What Is VoIP and How Does It Work
IntroductionThe way we make phone calls is changing. In fact in many circumstances things have already changed.
Try VoIP for Free - No Commitment, No Hardware
Try VoIP Before BuyingSo you like the concept of 'cutting' your phone service in favour of VoIP but are hesitant to take the plunge and abandon your 'Landline' without trying it out for yourself first. Perhaps the advertised features and rates all sound a little 'too-good-to-be-true'.
How to Never Pay a Hotel Phone Bill Again
The protocol is increasingly being adopted as the standard means by which computers communicate to facilitate VoIP or Voice Over Internet Protocol. So you can imagine SIP as a common language for new generation operators to speak to connect calls.
Why VoIP is not Going to Fail
VoIP is an almost constant topic in our daily dose of business and tech-related news. VoIP, or Voice over Internet/IP is really an old technology re-emerging with a new face and marketing spin.
Voice over IP (VoIP) Features
Because with VOIP you can make calls from anywhere you have access to a broadband connection, users can take their IP phones or ATA's with them on trips and still have access to what is essentially their home phone.Some people use a softphone to access their VOIP service.
Voice over Internet Protocal VoIP for Business
VoIP consists of 2 major technologies..
What's Your IQ on Basic PC Phone (VoIP) Knowledge
Short T/F quiz1. T / F You can save a significant amount of money using VoIP rather than traditional telephone/cell phone calling methods.
How VoIP Works -- Busting Out of Long Distance Rates
VoIP is the newest advancement in audio communications technology, and has a
variety of different applications that make it useful. VoIP stands for Voice
over Internet Protocol, and how VoIP works is actually quite revolutionary
because it streamlines the process of sending analog audio signals by converting
them to a much easier to send digital form for transmission.
Outstanding VoIP Voicemail Features Makes Getting VoIP Voicemail Extremely Convenient
There are many types of VoIP (Voice over Internet Protocol) protocols that are employed by the VoIP providers currently providing VoIP calling plans. Luckily for the consumers, the VoIP providers have listened to what functions the consumers want in their Voicemails.
Should You ,VoIP?
My friend in Florida, Samuel, called me last week and immediately I noticed a difference in the sound quality compared to our usual conversations. At first, I dismissed it, thinking he was calling me from his cell phone.
Bluetooth Computer Headsets - Enjoy Wireless Freedom
Wireless Computer HeadsetsTill recently, few options were available to people interested in using cordless headsets with their computers. Dedicated wireless Headsets are available, however they often cost upwards of $200 US putting them out of reach of the average user.
VoIP in the Home
VoIP is set to revolutionise home communications. With VoIP you can make telephone calls over your broadband connection for free! Well in some cases you can, in other cases you might need to pay a monthly subscription to a VoIP service provider.
VOIP
This article contains the excellent information about the Voice Over IP Protocol.Voice over Internet Protocol (VoIP) technology is the wave of the future in terms of telephone communication via the Internet.
Lower Videophone Prices Allow Individuals Accessibility
VoIP service providers are now offering videophone at the lowest price we've seen on the VoIP service market. The tremendous drop in prices will see more individuals and SMB's investing in this affordable futuristic way of communicating.
|
