On the early ARPANET, real-time voice communication was not possible with uncompressed pulse-code modulation (PCM) digital speech packets, which had a bit rate of 64 kbps, much greater than the 2.4 kbps bandwidth of early modems. The solution to this problem was linear predictive coding (LPC), a speech coding data compression algorithm that was first proposed by Fumitada Itakura of Nagoya University and Shuzo Saito of Nippon Telegraph and Telephone (NTT) in 1966. LPC was capable of speech compression down to 2.4 kbps, leading to the first successful real-time conversation over ARPANET in 1974, between Culler-Harrison Incorporated in Goleta, California, and MIT Lincoln Laboratory in Lexington, Massachusetts.[71] LPC has since been the most widely used speech coding method.[72] Code-excited linear prediction (CELP), a type of LPC algorithm, was developed by Manfred R. Schroeder and Bishnu S. Atal in 1985.[73] LPC algorithms remain an audio coding standard in modern VoIP technology.[71]

The only additional piece of equipment that you need is an Analog Telephone Adapter (also referred to as an ATA) that allows you to connect your existing telephone to your home Internet. This equipment is typically provided on a free lease basis from the home VoIP provider that you choose, or you can use you own device if you prefer. You can also use IP phone(s) instead of using the ATA with your existing analog phones. The sound quality is better but there is more up front cost as IP phones are more expensive than the ATA devices.


VoIP is a relatively new technology and it has already achieved wide acceptance and use. There is still a lot to improve and it is expected to have major technological advances in VoIP in the future. It has so far proved to be a good candidate for replacing the POTS (Plain Old Telephone System). It, of course, has drawbacks along with the numerous advantages it brings; and its increasing use worldwide is creating new considerations surrounding its regulations and security.
Now that so many people are working from home, keeping your business' voice communications organized and centralized can be tricky. Fortunately, that's where cloud-served voice over IP (VoIP) providers can shine. With cloud VoIP (sometimes called a cloud PBX system), you can move direct extensions to new geographical locations simply by clicking a mouse. Devices can also change with similar ease either with a software download or simply by re-configuring call forwarding. With many of these systems also adding a wide variety of team collaboration features, cloud VoIP is probably the best COVID-19 investment a business can make.
A high speed Internet connection is required to "carry" your calls so if you have an Internet outage (or your ISP has an outage) then your phone service will not work. Internet services have improved significantly in the last few years and outages tend to be much less common than they use to be. Again, if you have a cell phone then this may not be an issue for you.
In Oman, it is illegal to provide or use unauthorized VoIP services, to the extent that web sites of unlicensed VoIP providers have been blocked. Violations may be punished with fines of 50,000 Omani Rial (about 130,317 US dollars), a two year prison sentence or both. In 2009, police raided 121 Internet cafes throughout the country and arrested 212 people for using or providing VoIP services.[53]
In the United States, the Federal Communications Commission requires all interconnected VoIP service providers to comply with requirements comparable to those for traditional telecommunications service providers.[64] VoIP operators in the US are required to support local number portability; make service accessible to people with disabilities; pay regulatory fees, universal service contributions, and other mandated payments; and enable law enforcement authorities to conduct surveillance pursuant to the Communications Assistance for Law Enforcement Act (CALEA).

Because they're working across such a multitude of channels, many of today's phone systems are adopting the moniker of Unified Communications-as-a-Service (UCaaS). These are generally cloud-based, virtual PBXes (private branch exchanges) that include at least one, usually multiple, software clients to enhance their functionality on the web, desktop, and a variety of mobile devices. UCaaS systems have a wide variety of feature sets based on the tried and true VoIP. Even residential VoIP systems come with features that are simply impossible using a conventional telephone system.

Grasshopper isn’t technically a VoIP and it isn’t technically for residential customers, but it offers basically the same service for a competitive price. Technically speaking, Grasshopper is a cloud-hosted system that works on top of your existing landline or cell service so voice quality doesn’t suffer. While there’s a technical distinction, customers shouldn’t notice the difference. Grasshopper is built for entrepreneurs and small business owners who work from home. The Partner package is suitable for families, as it includes 3 separate contact numbers with up to 6 extensions. 
The quality of voice transmission is characterized by several metrics that may be monitored by network elements and by the user agent hardware or software. Such metrics include network packet loss, packet jitter, packet latency (delay), post-dial delay, and echo. The metrics are determined by VoIP performance testing and monitoring.[20][21][22][23][24][25]
These include features like voicemail-to-email (and/or fax to email) which will automatically take your voicemail messages and send them as audio files to your email, making you much less likely to miss important messages. Many companies can also provide you with voicemail transcription to text, which will automatically convert the messages to text in an email, saving you even more time. 
Voice Over IP (VoIP) service is great for both businesses and homes. Whether you live in a small apartment or a three-story house, you can save money and get telephone services you never knew existed. No matter how much they promise, the landline phone companies are still stuck in the twentieth century. They simply can’t compete with the features and prices offered by residential VoIP providers. The traditional phone companies charge you everything from tax, service charges and sometimes the occasional “hidden” fee. Residential VoIP plans and services can cut your home phone bill by an average of 50% every month. With additional internet searches, coupon sites, sign-up bonuses, and monthly specials, you can save even more. Residential VoIP service is a bargain-hunter’s dream. GetVoIP.com can help you find the best home phone provider for your needs.

RingCentral’s VoIP service isn’t the cheapest option right out of the box, but it does include features that other providers charge extra for (such as generous toll-free minutes and unlimited video conferencing). Plus, RingCentral offers price matching on plans with less than 50 lines, so you can rest easy knowing you’re getting the best possible price for your service.


Few things in life are set in stone, and the same should be true of your VoIP plan. It’s wise to find a plan that is scalable and which you can easily expand if need be. You’ll want to know if you can break your contract early if you find a better deal elsewhere, or if you can easily switch plans with the same company in order to take advantage of more features, or to get rid of some you don’t need. 
On 24 March 2020, the United Arab Emirates loosened restriction on VoIP services earlier prohibited in the country, to ease communication during the COVID-19 pandemic. However, popular instant messaging applications like WhatsApp, Skype, and FaceTime remained blocked from being used for voice and video calls, constricting residents to use paid services from the country’s state-owned telecom providers.[60]
Designed for busy executives and professionals, Yealink SIP-T52S is an easy-to-use Media IP Phone with a 2.8-inch color-screen and a distinctive appearance and structure. For its simplified and user-friendly design as well as user interface, it brings the IP phone and users closer to an unparalleled operating experience. With Yealink Optima HD voice technology, T52S enhances its audio quality, adding Opus audio codec delivering superb audio and voice communications.
1. The Microsoft 365 Business Voice service components of Domestic Calling Plan and Audio Conferencing are sold inclusive of all required taxes and fees, including 911 fees and other transactional taxes that typically apply to communication services in the U.S. The price includes these taxes and fees until June 30th, 2021. The Phone System component is sold tax exclusive and any applicable sales tax will appear as a separate charge in the U.S.
The great thing about VoIP is that it taps additional value from the already existing infrastructure without additional costs. VoIP transmits the sounds you make over the standard Internet infrastructure, using the IP Protocol. This is how you can communicate without paying for more than your monthly Internet bill. Skype is the most popular example of services that allow you to make free calls on your PC. There are many computer-based VoIP services out there, so many that you will have a difficult choice. You can also make free calls using traditional phones and mobile phones. See the different flavors of VoIP service that allow you to do this.
The ITU-T G.hn standard, which provides a way to create a high-speed (up to 1 gigabit per second) Local area network (LAN) using existing home wiring (power lines, phone lines and coaxial cables). G.hn provides QoS by means of Contention-Free Transmission Opportunities (CFTXOPs) which are allocated to flows (such as a VoIP call) which require QoS and which have negotiated a contract with the network controllers.
Before you can start considering a phone system, you need to figure out what it's going to be used for, and how much of your business will be involved. You need to look at your existing phone system and decide whether you're going to simply keep all of it and bolt some VoIP functionality on top, retain only part of it, or replace the whole thing. Frequently, a total replacement isn't in the cards if only because some parts of your existing phone system can't be easily changed over to softphones or even desktop VoIP phones. For example, if you have a heavy manufacturing environment with outdoor activities, such as a steel fabrication yard or even a landscaping company, your old outdoor phones may be exactly what you need. You also need to decide what features of the existing phone system are required, and what features of a future phone system you feel are necessary to carry into the future.

The most widely speech coding standards in VoIP are based on the linear predictive coding (LPC) and modified discrete cosine transform (MDCT) compression methods. Popular codecs include the MDCT-based AAC-LD (used in FaceTime), the LPC/MDCT-based Opus (used in WhatsApp), the LPC-based SILK (used in Skype), μ-law and A-law versions of G.711, G.722, and an open source voice codec known as iLBC, a codec that uses only 8 kbit/s each way called G.729.
Early providers of voice-over-IP services used business models and offered technical solutions that mirrored the architecture of the legacy telephone network. Second-generation providers, such as Skype, built closed networks for private user bases, offering the benefit of free calls and convenience while potentially charging for access to other communication networks, such as the PSTN. This limited the freedom of users to mix-and-match third-party hardware and software. Third-generation providers, such as Google Talk, adopted the concept of federated VoIP.[1] These solutions typically allow dynamic interconnection between users in any two domains of the Internet, when a user wishes to place a call.
Few things in life are set in stone, and the same should be true of your VoIP plan. It’s wise to find a plan that is scalable and which you can easily expand if need be. You’ll want to know if you can break your contract early if you find a better deal elsewhere, or if you can easily switch plans with the same company in order to take advantage of more features, or to get rid of some you don’t need. 
Figure out how much you’re willing to spend on your VoIP and this will help you better hone in on the company that’s right for you. Your residential VoIP should cost less than your current landline, but it’s still smart to do some price comparison and see which companies offer special deals (for instance, many companies will offer you a better rate if you sign up for a year plan rather than a month-to-month plan). Take a look at your monthly phone bill and the features you’re paying for, and compare that side-by-side with what you’d be signing up for with a VoIP plan. 
E911 (Enhanced 911) is a little different to traditional 911 services and is something that you should be aware of. With E911 you need to provide your home address, and this information gets passed to the emergency services if you dial 911. The concerns are that if you have a power outage or an Internet outage then you will not be able to dial 911. If you have a cell phone then you can dial 911 from your device. If you are ONLY reliant on VoIP for your phone service you should be aware of this situation.
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