Showing posts with label VOIP. Show all posts
Showing posts with label VOIP. Show all posts

Tuesday, 15 September 2009

How Does VoiP Work? - Some Simple Tips

The VOIP acronym stands for voice over internet protocol. What is it? How does VOIP work? It seems to be a mind-boggling term fitted only for geeks but its basic principle is the same as how many people use computers to record their voices with the use of a microphone. It starts with the computer sampling the sound that it hears from the microphone at the rate of a thousand times per second.

After that, the computer then stores the said samples in memory and the record can now be played and replayed by the user. VOIP, however, transmits these samples rather than save them on the local hard drive. Recorded audio is passed on to the internet protocol and to the network links so that a listener using another computer can hear the recorded voices.

Of course, there are other processes involved in voice over internet protocol. One is audio compression. Using a compressor/de-compressor (CODEC), recorded voices can be made to take less space and frequency range. Frequencies inaudible to the human ear are unimportant so they are taken off.

Another process is packetisation, which collects the recorded sound samples and puts them into bigger chunks and then places these chunks in data packets that are going to be transmitted, each packet usually containing 10-30 milliseconds of audio. And yet another process included in VOIP is data redundancy. Packets of data are being sent not just once but multiple times in order to make up for data loss that sometimes happen during the transmission.

Cisco VoIP, Shortcut to an Effective and Unified Communication

Technology has a never-ending story. It speaks about change and evolution and not about permanence. From film-making to video game consoles, expect that technology will find a way to change these things into something that will interest the public as well as have it coping up with the drastic change of time and society.

From the traditional method of recording films during the pre-war times, there you have modern film-making equipments to help film-makers and producers make their movies very interesting to the viewing public. Fantasy, scientific fiction (sci-fi), and animated movies are now possible with these modern film-making gadgets and equipments. On the other hand, from the 2-dimesional graphics and monotonous audio outputs of Magnavox and Atari video game systems, there you have the seventh generation of video game consoles, such as the newly-released PlayStation 3 and the Xbox 360, which is now the centre of attention of the gaming public.

Technology changed the way the people look and use such stuff.

It is not surprising to see communication tools evolve through the course of history. From the Morse code and telegraph mode of communication during the early times come the modern and sophisticated communication tools, which are produced for a single purpose-to provide individuals an effective, reliable, and convenient communication channel in keeping in touch with their friends and loved ones all over the world.

Regular telephone lines started the saga of modern communication system, which allowed individuals to make voice calls anywhere in the world in exchange for a certain fee charge on a per-minute or per-call basis, depending on the telephone service provider. At the later decades of the 20th century, mobile phones were introduced to the market. Such mobile phones allowed a user to make voice calls even if he or she is in a remote area, provided that the mobile phone service reaches such remote area. Satellite phones are also produced to cater individuals who are living outside the coverage area of a regular mobile phone service provider. These are all products of technology to make existing communication systems convenient and reliable for the public to use.

At the early years of the 21st century, the communication industry introduced another form of modern communication, which is said to be the most reliable and cost-effective communication tool nowadays-the Voice over Internet Protocol, or commonly known as VoIP. This latest communication offering is now wisely used for business application and now getting popular among residential and other applications as well.

VoIP differs from other communication system in one thing-communication medium. Unlike in regular telephone lines that make use of underground telephone cables and mobile phone lines that make use of signal towers, VoIP relies on a high-speed Internet connection to facilitate voice calls. Thus, VoIP routes voice conversations using the Internet or other Internet Protocol (IP)-based networks.

VoIP became popular to business applications because it cuts down telephone bills by as much as 60 percent, both in terms of installation costs and monthly bills. You only need to purchase one VoIP infrastructure and upgrade your existing VoIP system if you will need several lines in the future. In addition, VoIP systems are cheaper by about 22 percent in terms of operation compared to circuit-switched networks. That is why the installation cost and monthly billing in VoIP system is cheaper compared to regular telephone lines.

Such advantages prompt telecommunication giants to switch from their traditional phone system operations to VoIP system. One of which is Cisco, which provides VoIP-based structures to help business organizations integrate their communication system closely with their business processes as well as to ensure that information and other data reaches the intended recipients by using the most appropriate medium.

Cisco’s primary VoIP offering, which is the Cisco Unified Communication, is now a recognized product in voice as well as in data communication. It combined the advantageous features of networking security and open application programming interface to facilitate an effective business communication channel within the walls of your business organization, which can lead to simplified network management and lower total cost of business operation.

Soon, Cisco will introduce the VoIP system extensively to residential and other essential applications. They are committed to provide an effective and unified communication not just for businesses but for the world as a whole.

Tuesday, 1 September 2009

Mobile VoIP for Business

On March 23, Skype rolled out the beta of its Skype for SIP (Session Initiation Protocol) offering, the long-awaited move that lets enterprises use their regular phones in conjunction with IP PBX systems to make desktop calls to any phone in the world at (during the beta, at least) standard Skype rates. Depending on the company's usage, this could represent a decent chunk of money saved. In some ways, Skype for SIP may legitimize VoIP for the enterprise, but what about mobile calling?

In May, the Associated Press ran an article based on new numbers from the Centres for Disease Control and Prevention showing that 20% of American homes now only use cell phones vs. only 17% that are landline-only—a shift caused at least in part by the current recession. It seems more than plausible that enterprises are also looking for ways to drop their calling costs while giving mobile phone use higher priority. The perfect melding of these trends is mobile VoIP.

We Have the Technology
Mobile VoIP primarily runs over UMA (Unlicensed Mobile Access), which lets VoIP run on top of conventional GSM cellular service, or SIP, the increasingly popular, non-proprietary standard for Internet-based voice and video calls. VoIP Wi-Fi phones are available from several manufacturers. Unfortunately, what we don't have is a cooperative infrastructure.

"Mobile portal Voice over Internet Protocol offered by third-party application-based providers is a huge and direct challenge to the $692.6 billion global mobile voice market," says Akshay Sharma, research director for carrier network infrastructure, converged infrastructure with Gartner. "In time, traditional network-based mobile carriers face the real prospect of losing a major slice of their voice traffic and revenue to new non-infrastructure players that use VoIP."

Herein lies the central problem. Traditional cellular carriers lack a revenue model under which VoIP makes sense, and budding wireless data carriers lack the infrastructure to support today's enterprises. According to Sharma, some cell phone service providers have indicated that they will continue to use CDMA (Code Division Multiple Access), one of the two wireless standards used throughout much of the world. This is problematic because conventional cellular was never meant to perform as a data network. What the carriers need is 4G technology that can remedy the quality and latency problems that continue to plague VoIP services carried over voice networks, and 4G has yet to become a commercial reality.

Meanwhile, there are service providers that offer broadband-quality WiMAX service. VoIP over WiMAX works like a champ if the user has a strong signal, but there can be sporadic gaps in the service's map coverage, enough to make in-car VoIP calling over WiMAX difficult to impossible. Wi-Fi and WiMAX don't "hand off" signals from one hotspot to the next as quickly and effectively as cellular. This will likely improve as WiMAX networks grow and evolve, but today, even while some companies sell a WiMAX-based VoIP service to home users, they are not extending that service to enterprises.

"The issue is that data demand is the primary focus… and VoIP is an additional expense with limited return," says Carl Ford, partner with Crossfire Media and a key organizer of 4G conferences. "It would be nice to see someone enable end-user VoIP and not try to be a voice service. That's probably not in the cards for today, but ultimately it has to be, because the network is the Internet."

What Will It Take?
To a limited degree, mobile VoIP has arrived already. Several VoIP providers enable mobile VoIP today, but few are marketed in the United States and fewer yet come with business-oriented features. All of these services are still trying to cope with providing a data service on a switched-circuit voice network.

The landscape will likely change radically as 4G networks get deployed, the two main technologies here are WiMAX and LTE (Long Term Evolution). WiMAX has faced a hard road to date despite constant backing by Intel, and funding for a nationwide rollout remains elusive. Meanwhile, many cellular carriers are starting to look beyond CDMA and GSM to LTE. Based on the recently finalized (although still not ratified) 3GPP Release 8 spec, LTE offers peak download rates of 326.4Mbps, peak uploads of 86.4Mbps, and round-trip packet times below 10ms. Usually, users don't perceive latencies of under 50ms in voice conversations, so LTE is primed for VoIP. Verizon expects an initial LTE rollout in 2010. AT&T should follow suit in 2011. Expect limited trials even sooner. Just don't expect overnight miracles for mobile VoIP.
"Despite the potential for a big impact on the industry, we believe the conditions for the rapid expansion in the use of mobile VoIP are not yet right and are not likely to become right for at least five years and perhaps as long as eight years," says Gartner's Sharma. "Transition to mobile portal VoIP should be fairly rapid once the basic market conditions are in place because of the convenience and end-user cost savings. In 10 years, we expect that 30% of mobile voice traffic will be carried by third parties. These third-party mobile portals, such as Google, Facebook, MySpace, and Yahoo!, will adopt wireless VoIP service as a voice option to their current communications hub."

It follows that similar, though more business-focused, portals will deliver mobile VoIP to enterprises. Feature availability will be critical. According to Sharma, a successful mobile VoIP offering for business will need to work with the enterprise's IPBX and offer full PBX-class services while roaming. "The cell phone becomes an extension of the desk phone or you don't even have a desk phone. Everyone just gets a cell phone." These mobile VoIP phones will deliver more than voice; they'll also provide unified communications, including email, IM, and collaboration. VoIP on its own has proven insufficient to displace conventional cellular service, but VoIP as a key component within a larger suite of productivity services to handsets seems unstoppable.

Affordable IP-Based Phone Systems from Up & Coming Players

Many "next best thing" technologies see a lot of hype and then fade into IT oblivion. But voice over IP-commonly known as VoIP-as an alternative to traditional landline telephone applications is not going away anytime soon after its commercialization just a few years ago. Following the early-adoption phase of VoIP, IP-based phone systems are now rapidly reaching mainstream-scale adoption as administrators realize cost savings and take advantage of the technology features that VoIP adds to their LANs.

Although in its early days VoIP often involved costly capital outlays and glitches in voice quality, administrators can now expect high quality and low costs on par with traditional landline phones. Here are a few emerging vendors with the experience under their belts to offer a smooth transition to VoIP at an affordable cost for SMEs.

Telesphere

Instead of having to cobble together a VoIP system in bits and pieces, Telesphere offers a single package.

"Telesphere gives businesses everything they need for a complete phone and Internet solution, all with no up-front capital costs," says Telesphere CEO Clark Peterson. "This includes high-definition phones, the data and voice connections, training, and support."

However, many administrators often worry that VoIP poses quality risks and that voice packets will get dropped and phone calls will not work due to slow Internet speeds. But that will not happen with Telesphere’s solutions because Telesphere offers its services with a dedicated T1 line to ensure the connectivity quality of voice calls, Peterson says. "This level of quality cannot be guaranteed by companies who use the public Internet for their VoIP services," Peterson says.

Telesphere’s offerings include PBX services, SIP trunking, and HD phones, as well as integrated toolbars, call centre applications, and CRM integrators, which add up to efficient and cheap voice and data applications. "The days of having separate connections for voice and data connections are gone, and the [benefits] of a combined pipe using VoIP results in substantial savings and efficiencies," Peterson says.

Speakeasy

Speakeasy is a rapidly expanding VoIP provider that offers support services only a small firm can offer. Although most of Speakeasy’s customers are enterprises with 100 or fewer employees, the firm can also scale up to fulfil a level of service for larger firms, says Bruce Chatterley, president and CEO of Speakeasy.

"Combined with the fact that we do not outsource our customer support to call centres abroad, has allowed us to build a reputation around stellar customer service and a personalized approach," Chatterley says. "When customers call Speakeasy for support, the first person they reach is able to answer all their questions, whether technical, administrative, or anything in between."

Larger customers with 250 to 1,000 users, for example, can benefit from Speakeasy’s offerings across the United States. "Our privately managed network provides connectivity and voice service throughout the United States to over 100 major metropolitan markets, and our customers have one contact person for technical and customer support, one bill, predictable pricing, and simple solutions," Chatterley says.

The solutions Speakeasy offers on a national basis include a full-service hosted PBX platform and integrated access services, including delivery of analogue lines, PRI/CAS, and direct SIP trunks. Setting up a Speakeasy VoIP system is also "very easy to do," Chatterley says. "Speakeasy manages the install, maintenance, and any modifications as needed. For those IT managers who also need to train their end users, Speakeasy offers various training tools, including printed quick-reference guides, online videos, and Webinars."

ShoreTel

ShoreTel offers VoIP solutions that are very easy to set up, with a low learning curve for administrators and end users alike. But although essentially plug-and-play VoIP usually comes at a price, the firm says it offers proof of return on investment before you invest in one of its solutions.

Ridley advises administrators to look at the "real cost" of a traditional landline telephony solution and compare it to a VoIP system. "The acquisition check isn’t the whole picture when it comes to voice deployments, and just because you have a legacy system perhaps in place, it doesn’t mean that voice is free," Ridley says. "It’s important that you understand your current maintenance costs for voice and what the upgrade and maintenance cost of a proposed VoIP system will be. Compare the system’s five-year total cost of ownership before making a decision." Ridley says ShoreTel’s pricing is very competitive but that the long-term telecommunications cost savings are also an important benefit to consider.

ShoreTel’s IP phones include its ShoreGear Voice Switches, which can combine communications across several enterprise locations, and its ShoreWare Call Manager, which allows end users to manage communications from their computers and move among video, voice, and instant messaging applications. ShoreTel’s ShoreWare Contact Centre can accommodate many different uses, ranging from call centre needs to distributed multimedia contact centre applications.

Monday, 31 August 2009

4 Ways To Save With VoIP

Get The Most Out Of Internet Telephony In Tough Times

Today’s economy is squeezing every penny it can out of the data centre - even Internet telephony is feeling the squeeze. As enterprises consider implementing VoIP technology, they are forced to consider ways to cut costs while trying to balance the best solution in the meantime. The good news is it’s possible - according to VoIP manufacturers and industry experts. Here are four ways that SMEs can save money when undertaking a new VoIP project.

Take Advantage of What VoIP Has To Offer

Make sure to uncover all the benefits of using VoIP that can add real value in addition to cost savings. Chris Maxwell, director of Voxeo Labs, says it’s important for IT and data center managers to look to unified communications applications that integrate a variety of modalities, including voice, video, presence, conferencing, and text to streamline communication. He elaborates, "Companies can take advantage of new instant messaging and SMS capabilities that are available now with VoIP or integrate voicemail with email and combine email contact lists with phone lists by doing so."

Maxwell says data centers should consider using softphones for remote workers or even employees at headquarters to cut costs. He says a good headset can usually overcome quality concerns when using a computer as a primary phone.

SIP trunking should also be considered as an alternative, according to Matthew Kovatch, vice president of sales at Taridium. "Depending on your call volume, a complete new VoIP business phone solution can be paid off within six to eight months by reducing telephone costs alone,” Kovatch notes. “Some companies… offer comprehensive consulting and legacy migration programs that tie into your existing infrastructure."

According to Kovatch, investing in open-standards VoIP may not be a bad idea, either. "Handsets, for example, can make up to 80% of initial hardware cost, and if you choose a proprietary vendor, you might be tied to the vendor forever with expensive and inconvenient hardware upgrades," he says. "And consider a managed VoIP service if you are concerned about acquisition costs." Kovatch says a managed service combines the reliability of an on-premise open-standards VoIP telephony system with the convenience of a simple monthly fee for equipment, phone service, and support.

Choose Your Infrastructure Wisely

Maxwell says starting with an IP PBX (Internet Protocol private branch exchange) is a good idea. "Companies can get their feet wet by trying out an IP PBX," he says. "Many small to medium-size enterprises are finding free, open-source PBXes.., and many other bundled IP switch technologies are becoming increasingly stable, more widely used, and highly functional. It’s possible to implement some of these devices quite easily and cheaply. The benefit is low cost; the trade-off may be in installing and configuring the software yourself."

In Maxwell’s opinion, considering your existing phone lines is also a good idea. "There are devices such as media gateways and ATAs (analogue telephone adapters) that serve as converters from analog phone lines to SIP-based VoIP lines," he says. "This allows companies to keep their current telephone provider, infrastructure, and phone numbers while serving VoIP to local and remote locations using ATAs. In fact, if you have a WAN between two offices, it’s possible to bring in calls to a single location, convert the calls to VoIP, and send the calls to remote locations via SIP to be answered by remote employees."

Glean From Reports & Monitoring

Criss Scruggs, senior manager of product marketing at NetIQ, says that now, more than ever, organizations are being asked to demonstrate the value and return of each new investment. So how do organizations justify their VoIP expenditures while saving money simultaneously? "While not really a trade secret, reporting is the way to accomplish this task," Scruggs says. "You should already be doing this for your critical applications, and by extending existing reporting capabilities to the VoIP network, you can not only demonstrate service levels, but also rapidly identify and resolve call-quality issues. In addition, reporting can be leveraged as a capacity-planning tool for the next phase of your VoIP implementation."

Scruggs adds that proper diagnostics and reporting not only save money, but also help SMEs to proactively address call-quality issues that will impact business performance and tangibly demonstrate the value of VoIP. "By wrapping reporting into your standard VoIP rollout, you can avoid future downtime for end users, justify to your customers the call quality and service delivery metrics as needed, and prevent business stakeholders from questioning the value of your communication investments," he says.

Scruggs also says that deploying a complex communications system across your network should not occur without proper monitoring for the proof of concept and post-deployment phases, which does present up-front costs but saves considerable cost over time. He says it is not uncommon for distributed organizations to believe their networks are prepared to adequately support VoIP and deliver the QoE (quality of experience) and service that users have come to expect with traditional telephony.

On the other hand, he says research shows that nearly 70% of those actively researching VoIP monitoring solutions are doing so after deployment in response to significant increases in trouble tickets and service quality complaints. "In today’s economy, most organizations cannot afford these issues, as they can result in lost revenue," Scruggs notes. "Deploying a monitoring system after your initial VoIP implementation can be time-consuming and costly."

Handle Your VoIP Network with Care

What do VoIP and cars have in common? Scruggs says that, when properly maintained, both VoIP networks and motor vehicles can deliver incredible benefits that far exceed the maintenance and purchase costs. "For example, by following the manufacturer’s maintenance timeline and due diligence recommendations, you can make your car last over 250,000 miles by offsetting future, larger issues and making the most of your initial investment," he says. "The same is true for VoIP. By spending your money on the right things from the get-go-assessment, monitoring, and reporting - you will achieve the best system performance and QoE for your users over time."

By not following this proper management path, Scruggs says the chances of sporadically paying much larger amounts to fix issues and potentially needing a major system overhaul increase dramatically. "These very issues and hidden costs can be easily avoided with proactive management, which may be an additional cost up front but will save significant funds in the long run."

VOIP WLAN Module

VOIP is currently being used by residential and business sectors around the globe. It combines voice and data all in one to clearly communicate to other people around the globe through the use of modems. It is a receiver that is being used to allow clear and a good quality of voice transmissions.

As of today there are so many people using communicating gadgets such as cellular phones as well as computers. With this system it prevents the so called "busy network" thus enhancing the quality of the coverage used. Relayed calls and messages that are being passed on to each user are not delayed. In business transactions using a VOIP WLAN module will enable big bosses to receive and send messages to their employees, supplier and customers in less time.

By using the internet for receiving and sending messages, the VOIP WLAN module helps relay the message immediately to their destination. In the case of using Skype, we can see and hear the people we are talking to on the other line. We can see their instant reaction, and we can hear them clearly. In using cellular phones we can hear the person on the other line clearly with no interruptions and with no delays on text messages.

We can very well say that using the VOIP WLAN module reduces errors in relaying messages from one party to another. It reduces the time for the messages to get to their destination and for receivers to actually view them. It also provides minimal costs for the user because he no longer has to repeat what he is saying nor does he need to send too many messages to the other person.