A business phone system helps you to present a professional image to your customers. If you do not have a need for office phones or spend the money, you can still use a virtual phone system to project a professional look. This enables you to place a call directly to a mobile phone. It also has key features like voicemail transcription and automated attendants.
In 1999, a discrete cosine transform (DCT) audio data compression algorithm called the modified discrete cosine transform (MDCT) was adopted for the Siren codec, used in the G.722.1 wideband audio coding standard.[74][75] The same year, the MDCT was adapted into the LD-MDCT speech coding algorithm, used for the AAC-LD format and intended for significantly improved audio quality in VoIP applications.[76] MDCT has since been widely used in VoIP applications, such as the G.729.1 wideband codec introduced in 2006,[77] Apple's Facetime (using AAC-LD) introduced in 2010,[78] the CELT codec introduced in 2011,[79] the Opus codec introduced in 2012,[80] and WhatsApp's voice calling feature introduced in 2015.[81]
Businesses working remotely should keep in mind, though, that Ooma doesn’t offer any videoconferencing tools. Instead, you get a conference line that lets at-home employees collaborate over the phone. That puts Ooma a pace behind some of the other providers on our list, but with providers like Nextiva currently offering their video collaboration tool to businesses for free, it shouldn’t be a major issue.

Yealink DECT repeater RT20U, designed in accordance with Digital Enhanced Cordless Telecommunication (DECT) standard, is widely compatible, easy to install, and a user-friendly display concept. The repeater, base station, and cordless handset employ wireless connection. It can be deployed to extend the DECT radio coverage of all Yealink base stations significantly in all directions. Signals with clear status LED display are exchanged without acoustical, and visual differences.
^ Jump up to: a b Mahanagar Doorsanchar Bhawan and Jawahar Lal Nehru Marg (May 2008). "Telecom Regulatory Authority of India (TRAI) Consultation paper on Issues related to Internet Telephony. Consultation Paper No. 11/2008" (PDF). New Delhi India: Telecom Regulatory Authority of India (TRAI). p. 16 (Section 2.2.1.2 PC–to–Phone Internet telephony). Archived from the original (PDF) on October 6, 2014. Retrieved September 19, 2012. An end user is allowed to make PC–to-Phone Internet Telephony calls only on PSTN/PLMN abroad.
Phone.com straddles the line between business and residential VoIP with a bunch of pricing plans suited to families. It structures its packages a little differently than its competitors. Customers can choose between pay-per-minute plans, which are cheaper but have fewer functions, or unlimited plans, which are more expensive but all-inclusive. The pay-per-minute plans come with a 30-day money back guarantee.
Yealink YHS33-USB is a professional headset with the over-the-head style that eliminates background noise and helps you get in your concentration zone and focus. Coupled with wideband audio technology and HD voice, the YHS33-USB delivers richer and clearer conversations, as well as reduces listening fatigue. Simple plug-and-play setup allows you to use the USB port to the USB-supported Yealink IP phones, plug it into the USB port or 3.5mm jack to your laptop, or use the 3.5mm jack straight into your smart device. Get easy access at your fingertips via the intuitive control unit to the frequently-used functions, such as accept incoming calls, adjust volume and mute the microphone. Yealink YHS33-USB stands its unique position in the market with the combination of exceptional comfort, durable lifecycle, premium quality, and brilliant sound.
As a consultancy marketing business for small-business owners, part of our business is to help small-business owners set up their VoIP and local phone numbers. We used to have RingCentral, and we advised our clients to use it. RingCentral gives you a local phone number regardless of whether you are in the building or not—or even in the city. You will always have a local phone number that you can redirect to any cell phone, depending on who’s working in the company. RingCentral offers good customer service and has great flexibility, but it’s a bit expensive.
A critical part of the discussion with your IT staff will be whether your existing data network can handle the extra load that will be placed on it by the new phone system. You'll need a network that can handle more advanced network management capabilities, including tools to fight jitter and latency as well as to provide Quality of Service (QoS) and different kinds of network segmentation, especially virtual LANs (VLANs). Only tools like these can help free up your network from too much congestion, which can cause your call quality to decrease or even crash the VoIP system entirely.  
We recognize that not all our readers’ businesses are based in the US. So we took another pass at our content to provide more information on each provider’s international offerings. And because 8x8’s international rates on calls made from the US are so good, we bumped it up to our number five spot. Finally, we added info about Ooma’s new plan (Ooma Office Pro) to the offerings mentioned below.
Voice over Internet Protocol (VoIP), also called IP telephony, is a method and group of technologies for the delivery of voice communications and multimedia sessions over Internet Protocol (IP) networks, such as the Internet. The terms Internet telephony, broadband telephony, and broadband phone service specifically refer to the provisioning of communications services (voice, fax, SMS, voice-messaging) over the public Internet, rather than via the public switched telephone network (PSTN), also known as plain old telephone service (POTS).
Fortunately, most of the providers reviewed here have engineering staff that will contact you as part of your setup process to help your IT staffers test and optimize your network prior to deploying their solutions. That's definitely something we recommend, but there are steps you can take now to prep your LAN for VoIP and make the deployment process that much easier.

If you are seeking a superb pan/tilt/zoom (PTZ) video conferencing camera for medium-size meeting rooms, the Yealink VCC20 is an ideal choice. 2.18M pixels HD CMOS sensor plus 12X optical zoom power the VCC20 HD PTZ, delivering HD images up to 1080p at 30 fps. The Yealink VCC20 camera is an optimal solution for a smaller business environments. It is so detailed and true to life that you feel like you are in the meeting room with everyone else.


Mobile clients are softphones optimized for a particular mobile OS and for being used in mobile situations. This means they're designed to switch easily between different cell and wireless connections on the fly. This means you can let your employees use whatever the cheapest wireless connection around them happens to be—and often that can be free. They also let your employees use your company's phone system on their own devices.
Businesses need a number of phone features to improve their productivity and efficiency. The investment in achieving this with a fixed landline service is high, while many VoIP providers offer many of these features for free. Even for the more advanced services paid for, a VoIP service costs significantly less than a regular landline phone service. https://www.lascomsolutions.co.uk/
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]
Yealink YHS33-USB is a professional headset with the over-the-head style that eliminates background noise and helps you get in your concentration zone and focus. Coupled with wideband audio technology and HD voice, the YHS33-USB delivers richer and clearer conversations, as well as reduces listening fatigue. Simple plug-and-play setup allows you to use the USB port to the USB-supported Yealink IP phones, plug it into the USB port or 3.5mm jack to your laptop, or use the 3.5mm jack straight into your smart device. Get easy access at your fingertips via the intuitive control unit to the frequently-used functions, such as accept incoming calls, adjust volume and mute the microphone. Yealink YHS33-USB stands its unique position in the market with the combination of exceptional comfort, durable lifecycle, premium quality, and brilliant sound.
Whether it's a dedicated bridge device or a special VoIP phone, you'll need something on the hardware side compatible with VoIP in order to access the technology's chief benefit: its software layer. It's at this layer where VoIP's advanced communication and collaboration features are enabled and how well the provider has leveraged those advantages will be directly reflected in how its proprietary hardware and back-end services are programmed. Whether it's a phone or a bridge, if you're worried about getting lost in technobabble when trying to setup your new phone service, remember that the best providers should be able to ship you pre-configured devices that shouldn't require much, if any, intervention on your part. With these, you simply plug them into your router or connect them to your Wi-Fi network and they'll go out and find the provider's network on their own. Just power them up, connect to your network, and wait for the light to turn green.
Similar to Ooma's residential service (below), AXvoice deploys its home VoIP with the help of an appliance, appropriately called the AXvoice Device, which sits between your home's phones and your Internet router. This device not only serves as a bridge between your old phones and the new VoIP service it also enables many of the advanced features that straight POTS bridges often don't address.
Softphones are increasing in importance in VoIP offerings to the point that for some they're the only choice. They are a critical part of UCaaS and are as common on mobile phones and tablets as they are on desktop PCs. For workers in call centers, softphones are a common tool because of they're the front-end window of any CRM or help desk integration. So, for example, a softphone can combine a telephone conversation with text chat and screen sharing, which means a conversation between two employees can seamlessly add more participants, handle private text chats between those participants while the call is still going on, and extend to a collaboration session in which the group shares screens, documents, and data—no prep, no reserved lines, just button clicks.  
The only area where a landline offers something VoIP phones can't is that they're more disaster resistant. Lost power to your house and your landline phone will keep on working. But if the power drops to your home's internet router, our VoIP phone goes dark, too. However, this limitation is less crippling these days as most people have a smartphone of some kind backing up their home phone. That phone will keep working in the event of a power outage, which means you can still make emergency calls. And if you've opted for a mobile client on your home VoIP account, you can even make those calls using your home phone number rather than your mobile number if you prefer.
Ooma advertises only two plans: Ooma Office and Ooma Office Pro. Ooma Office includes unlimited domestic calls, three-way calling, virtual fax machines, plus most of the industry-standard features you’d expect from a leading private branch exchange (PBX) provider. Meanwhile, Ooma Office Pro offers more premium features, including call recording and enhanced call blocking—to name a few. But with either plan, you’ll have to pay a $29.95 one-time activation fee to get your service started.
The products and services in this review roundup are focused on business use and because of this either provide some PBX features or serve as full-on virtual PBXes. This may mean, among other things, that they provide service to telephone sets on your employees' desks. Most also support electronic faxing in some fashion, either directly (which can be a significant challenge for some VoIP services) or by simply integrating an incoming fax with your email system. Other popular features are video conferencing and shared meeting software (so meeting attendees not only hear each other but can present presentations or documents in a shared work space).
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 RTCP extended report VoIP metrics block specified by RFC 3611 is generated by an IP phone or gateway during a live call and contains information on packet loss rate, packet discard rate (because of jitter), packet loss/discard burst metrics (burst length/density, gap length/density), network delay, end system delay, signal/noise/echo level, mean opinion scores (MOS) and R factors and configuration information related to the jitter buffer. VoIP metrics reports are exchanged between IP endpoints on an occasional basis during a call, and an end of call message sent via SIP RTCP summary report or one of the other signaling protocol extensions. VoIP metrics reports are intended to support real-time feedback related to QoS problems, the exchange of information between the endpoints for improved call quality calculation and a variety of other applications.
A telephone connected to a land line has a direct relationship between a telephone number and a physical location, which is maintained by the telephone company and available to emergency responders via the national emergency response service centers in form of emergency subscriber lists. When an emergency call is received by a center the location is automatically determined from its databases and displayed on the operator console.

Flexible Messaging Options – There are a number of business phone service options available that make retrieving and maintaining your business messages very simple. With Voicemail Transcription, you can read the message in your inbox, or receive it as a text instead of listening to it. Let’s say a client calls you about a fax he needs, and leaves a fax number on the message. With a few clicks you can virtually send the fax as a PDF to that number.

If you’re located in one of the 21 states currently serviced by Verizon Fios—which are mostly in the northeast—you’ll have access to one of the fastest internet connections available, which is perfect for VoIP. If you’re in DSL-only country, the speed will be slower, but uptime is still guaranteed at 99.95%. Either internet option will support steady VoIP service, and if your business is more medium-sized than small, Verizon could add up to a better value in the long run (especially if you’re in Fios territory).
Ooma advertises only two plans: Ooma Office and Ooma Office Pro. Ooma Office includes unlimited domestic calls, three-way calling, virtual fax machines, plus most of the industry-standard features you’d expect from a leading private branch exchange (PBX) provider. Meanwhile, Ooma Office Pro offers more premium features, including call recording and enhanced call blocking—to name a few. But with either plan, you’ll have to pay a $29.95 one-time activation fee to get your service started.
The EXP40 Expansion Module for the SIP-T46S, SIP-T46G, SIP-T48S, and SIP-T48G, expanding the functional capability of your sip phone. It features a large graphic LCD. Two pages of 20 flexible buttons are shown and can be program up to 40 various features. The productivity-enhancing features include BLF/BLA, speed dialing, call forward, transfer, park, and pickup.
Nextiva also provides a number of helpful features for businesses working from home. For starters, there’s the Nextiva app, which lets you use your business phone number to make calls remotely from your desktop or mobile devices. Nextiva’s team collaboration tool, Cospace, also lets your team collaborate via video chat, so you can keep everyone one the same page.
We recognize that not all our readers’ businesses are based in the US. So we took another pass at our content to provide more information on each provider’s international offerings. And because 8x8’s international rates on calls made from the US are so good, we bumped it up to our number five spot. Finally, we added info about Ooma’s new plan (Ooma Office Pro) to the offerings mentioned below.
Sending faxes over VoIP networks is sometimes referred to as Fax over IP (FoIP). Transmission of fax documents was problematic in early VoIP implementations, as most voice digitization and compression codecs are optimized for the representation of the human voice and the proper timing of the modem signals cannot be guaranteed in a packet-based, connection-less network. A standards-based solution for reliably delivering fax-over-IP is the T.38 protocol.
Another legal issue that the US Congress is debating concerns changes to the Foreign Intelligence Surveillance Act. The issue in question is calls between Americans and foreigners. The National Security Agency (NSA) is not authorized to tap Americans' conversations without a warrant—but the Internet, and specifically VoIP does not draw as clear a line to the location of a caller or a call's recipient as the traditional phone system does. As VoIP's low cost and flexibility convinces more and more organizations to adopt the technology, the surveillance for law enforcement agencies becomes more difficult. VoIP technology has also increased Federal security concerns because VoIP and similar technologies have made it more difficult for the government to determine where a target is physically located when communications are being intercepted, and that creates a whole set of new legal challenges.[68]
Nextiva also provides a number of helpful features for businesses working from home. For starters, there’s the Nextiva app, which lets you use your business phone number to make calls remotely from your desktop or mobile devices. Nextiva’s team collaboration tool, Cospace, also lets your team collaborate via video chat, so you can keep everyone one the same page.
Mobile clients are softphones optimized for a particular mobile OS and for being used in mobile situations. This means they're designed to switch easily between different cell and wireless connections on the fly. This means you can let your employees use whatever the cheapest wireless connection around them happens to be—and often that can be free. They also let your employees use your company's phone system on their own devices.
Vonage is probably one of the most well-known PBX providers on the market—and for good reason. Vonage phone service is easily scalable, so it can keep up with your business as it grows while maintaining affordable pricing. Vonage also offers integrations with everything from Salesforce to Slack. So if your business outgrows your current customer relationship management tools, you can switch without having to worry about whether your VoIP communications service offers integration with your new CRM.
Some of that software is running on the provider's servers, but parts of it will be running on your devices, whether that's a PC a mobile phone or a VoIP phone. It's this software layer that provides the rich feature fabric, which along with its lower price, is what's drawing residential customers to the technology. Some of the more popular advanced features you'll find available in a residential service, include:
Still the pandemic won't last forever so keeping in mind core VoIP criteria is important, too. That means providing voice communications for employees at their desks. VoIP systems may also need to support a call center for sales, customer service, and support; and they often need to connect with and through a host of other communications channels, such as fax machines, video conferencing, conference calling, mobile communications, wireless handsets, and text messaging. On top of that, they're often expected to provide more advanced functionality through software, like shared meeting collaboration, voicemail to email transcription, and call recording. And lest we forget, many businesses still need a service that will connect to public switched telephone network (PSTN).  
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