In general, the provision of VoIP telephony systems to organisational or individual users can be divided into two primary delivery methods: private or on-premises solutions, or externally hosted solutions delivered by third-party providers. On-premises delivery methods are more akin to the classic PBX deployment model for connecting an office to local PSTN networks.
Most of these VoIP solutions will require stable and consistent internet connectivity at every location where wired phones are to be used. At the very least, your business phone system must have access to a business class internet link to the cloud. This should be a dedicated link through a dedicated router if you expect your phone calls to sound as if they were coming from a business and not someone's home Skype connection. But it's important to know that you will also need a router that can create a virtual LAN (VLAN), and one that has the ability to encrypt voice traffic, and only your voice traffic. VoIP security from end to end for all calls is now a business necessity.

However, for many businesses there's a need to route calls to the PSTN and other analog phones that might remain in use, too. This may mean a PSTN gateway, or even a hybrid PBX, where there's at least a small telephone switch located on-site. Note that these days, a PBX looks exactly like the other servers in your data center, except with an attached means of handling local and analog phones. Many small businesses, however, are avoiding on-premises PBXes partially due to cost savings and partially because the capabilities offered by all-cloud systems are more than advanced enough for their needs. Some virtual cloud PBXes can handle PSTN connectivity without on-site hardware requirements.
If you want to compare pricing for multiple residential service providers you can use our Home Phone Rates Tool. Please note that the pricing does not include additional fees like sales tax, regulatory fees and any other taxes/fees that may be relevant to your location. These tend to be the same for each provider as it is based on location, however, some providers may include additional "recovery" fees for the overhead involved in state and regulatory compliance (e.g. FCC reporting compliance).
By moving to internet phone technologies, companies are not only able to save a lot of money but also improve their communication infrastructure. Small home-based businesses that could never have a fully-equipped telephone system installed in their premises can now enjoy all the benefits at a fraction of the cost. Some VoIP services offer value for money business call plans that are specifically targeted at small home based businesses.

If you're wondering what you get with a softphone that you won't with a standard phone handset, then that depends on the service. Business-class softphones offer all kinds of features related to online meeting collaboration, call routing, multi-line conference calling, and more. From a residential VoIP perspective, you'll most often find video conferencing (though more and more this is becoming a separate product from most providers), a voicemail-to-text converter, detailed call records, and user controls for users other than yourself. Some services also offer faxing, text chat, and call metering so you can see how much you're spending.
One advantage of the traditional landline services is that electrical power is sent over the telephone wires so your phone service is isolated from your house power. This meant that your phone service would continue to work if your house power went out. However, with VoIP, power is used not only for the ATA, or the IP phone, but it is also used for your Internet modem and router devices. No power also typically means no Internet service.
Like the rest of us, you probably don't like to get hassled with unwanted phone calls when you’re at home. You can also implement “enhanced call forwarding” to reroute and block the numbers that you specify, without the caller having any idea. You also can set up your phone to block international and directory assistance calls, so they don’t bother you at home. 

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.
In the case of a private VoIP system, the primary telephony system itself is located within the private infrastructure of the end user organisation. Usually, the system will be deployed on-premises at a site within the direct control of the organisation. This can provide numerous benefits in terms of QoS control (see below), cost scalability, and ensuring privacy and security of communications traffic. However, the responsibility for ensuring that the VoIP system remains performant and resilient is predominantly vested in the end user organisation. This is not the case with a Hosted VoIP solution.
Like the rest of us, you probably don't like to get hassled with unwanted phone calls when you’re at home. You can also implement “enhanced call forwarding” to reroute and block the numbers that you specify, without the caller having any idea. You also can set up your phone to block international and directory assistance calls, so they don’t bother you at home. 
From an end user point of view, the actual phone service works in the same way, you pick up the phone to answer a call or to dial a number just like with a landline service. Number porting means you can keep your existing phone number and simply switch it over to your new service provider. The residential VoIP providers take care of the call routing and you can call any destination and receive calls from anyone, just like with regular home phone service.
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