Home
>
VOIP
>
VoIP - What is the Problem?

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 telecom. For networking and security check alta global telecom.

affordable house cleaning Wilmette ..

In The News:

A new phishing scam targets family photos with fake "Cloud Storage Full" alerts. Criminals steal credit card information through fake sites. Learn protection tips.

South Korean scientists create ultra-thin fabric muscles that turn clothes into robotic assistants, lifting 33 pounds while weighing under half an ounce.

Archer Aviation has acquired Hawthorne Airport for $126M to launch an LA air taxi network ahead of the 2028 Olympics, featuring AI-powered eVTOL operations and next-gen aviation tech.

Stay up to date on the latest AI technology advancements and learn about the challenges and opportunities AI presents now and for the future.

Fake AI apps disguised as "ChatGPT" and "DALL·E" are flooding app stores with dangerous malware that steals data and monitors users without detection.

Fake buyers demand specific vehicle reports from unknown sites to steal credit card information from car sellers, but warning signs can help identify these scams before paying.

Android users can now manage apps across multiple devices more easily with Google Play Store's updated remote uninstall button in the latest update.

NASA's Perseverance rover discovers shiny metallic rock on Mars that could be a meteorite from an ancient asteroid, containing high levels of iron and nickel.

Holiday scams spike during Black Friday and Cyber Monday as criminals exploit your leaked personal data. Learn how to protect yourself from fake stores and phishing.

Commerce Department proposes TP-Link router ban over Chinese security risks. Learn how this potential prohibition could affect your home network and devices.

Hyundai AutoEver America suffered a data breach affecting 2,000 current and former employees, exposing names, Social Security numbers and driver's license information.

Washington court rules automated license plate reader images are public records, even when stored by vendors like Flock Safety, setting precedent for transparency.

Fake airline texts claiming flight cancellations are targeting travelers with convincing scams. Learn how cybercriminals steal personal data and credit card info.

Discover how iOS 26's new Adaptive Power feature automatically extends iPhone battery life by learning your usage patterns and adjusting performance intelligently.

New TikTok malware campaign tricks users into running PowerShell commands that download Aura Stealer, which steals credentials and authentication tokens.

Gaia Family offers fixed upfront pricing for IVF cycles with unlimited embryo transfers and financial protection, partnering with over 100 U.S. fertility clinics.

The Jetsons Act aims to position Pennsylvania as a leader in advanced air mobility by establishing regulations for hybrid ground-air vehicles.

Fake Geek Squad invoice emails are targeting users with convincing charges and urgent phone numbers to steal personal information and money.

Fox News Digital's artificial intelligence newsletter digs into a robot in Russia that faceplanted, George Clooney's alarm and OpenAI's rivalry with the New York Times.

Major data breach at Conduent exposes personal information of 10+ million people. Government contractor hit by cyberattack affecting Medicaid, child support systems.

Texas startup Janta Power raises $5.5M for innovative vertical solar towers that generate 50% more energy than traditional panels while using just one-third the land.

NASA's twin ESCAPADE spacecraft launched aboard Blue Origin's New Glenn rocket Thursday afternoon from Cape Canaveral, beginning their journey to Mars with arrival expected in 2027.

Learn how to set email reminders on iPhone and Android so you never forget to reply again. Simple built-in features help you stay organized and on top of messages.

Discover how Apple's passkeys revolutionize Mac security by replacing vulnerable passwords with biometric authentication and encryption for ultimate protection.

New survey reveals 78% of parents fear AI scams targeting their kids, yet nearly half haven't discussed these threats. Learn why this dangerous gap exists.

VoIP - What is the Problem?

VOIP