What is VoIP?

VoIP is an acronym for Voice over Internet Protocol, also sometimes referred to as voice over IP. VoIP services enable users to make and receive phone calls over an internet connection, rather than through a phone line. VoIP operates on the same Internet telephony underpinning internet communications services, such as fax, voice-messaging, and SMS (short messaging service) text messaging. VoIP systems are often deployed as part of a larger unified communications strategy, supplying voice services to augment video conferencing, instant messaging, and other web-based communications.

How does VoIP work?

Legacy phone systems worked on a public switched telephone network (PSTN). PSTNs routed voice signals through copper wires, along fixed electrical paths, through a series of switches, and then to call destination. Each phone on the PSTN had a unique, mandated location-specific number. This system required organizations with higher call volumes to manage the proliferation of copper wires on their end with switchboards and dedicated call routing hardware. Much of this hardware was digitized over time, but calls were still routed A-to-B across telephone lines.

The sending and receiving of audio signals from one computer to another has been around for a while. Early computer telephony integration (CTI) converted audio signals into digital signals, called data packets. These packets were relayed from one terminal to another on local area networks (LANs). A PC downloading a page from a web server, or one computer sending an e-mail message to another computer, uses the same form of data packet relay to move information across networks.

This form of packet-switched communication is foundational to the layer of technology we call Internet Protocol (IP). IP networks route information from one dedicated IP address to another. So long as the IP address is correct, the kind of information- text, voice, or video - is immaterial. VoIP technology came into its own as internet speeds increased. Broadband connection speeds allowed data signals to be converted and recovered with greater efficiency, cutting down on packet loss issues that could result in a choppy signal or dropped calls. Today, as broadband connections become universal, VOIP solutions run sophisticated networks that are replacing many traditional telephone company offerings such as call routing, call centre management, and long-distance call placement.

How do I make a VoIP call?

All that you need to place a VoIP call is an internet connection and the proper software or hardware to access your VoIP system. Each device receives a VoIP number that is registered to the network’s IP address. But unlike legacy phone networks, VoIP numbers are specific to a user, not to a physical location. A single VoIP number can be hosted on multiple devices, a single device can receive calls for multiple VoIP numbers, and VoIP numbers are transferable from one location to another. The plasticity of a VoIP system unlocks numerous possibilities for businesses operating on a VoIP system. There is no need to change numbers when relocating team members or to set up finicky call forwarding to relay calls from one phone to another when travelling. Since multiple devices can send and receive VoIP calls, a team member can be made available on their tablet or mobile phone when they are unavailable from a desk phone.

There are three ways to make VoIP calls: by using an analog telephone adapter (ATA), a VoIP phone, or from computer to computer. The equipment best suited to your needs will depend on how you plan to use your VoIP system.

Analog Telephone Adapter

ATAs convert a standard analog phone into a VoIP device. Audio signals from your analog phone are converted into packet-switched data. ATAs are the only way to convert a regular phone into a VoIP-enabled device.

VoIP Phones

VoIP phones, also known as Internet phones, have the look and feel of an analog phone, but do not run on a landline phone system. Instead, they are connected to a gateway modem. VoIP phones can plug directly into your gateway or into your computer- you just need internet service.


As long as you have a computer or smart mobile device that is connected to the internet, and the necessary VoIP software is installed, you will be able to make calls. This form of communication requires both parties have an internet connection.

VoIP for Business

When it comes to choosing a telephone system suited to your business needs, scale is key. Small businesses, especially those that regularly make international calls, benefit from what the low costs VoIP service providers can offer, compared to their traditional phone service peers.

Organizations that handle telephone call volumes in the thousands daily can take advantage of the numerous efficiencies introduced by VoIP technology.

Business phone systems with multiple lines typically rely on an on-premise private branch exchange (PBX) to route calls. PBX is a descendant of the central operator and switchboard models. Calls on a private phone network are directed and routed manually to lines inside and outside of that network. This system requires expensive, often bulky equipment to be stored and serviced on-site. Any gaps in service can mean costly delays and repair.

By contrast, VoIP providers host PBX services on the cloud. Voice calls are routed through a central data centre, call flow processing uptimes are 99.9999%, and any updates to the system are enjoyed automatically. Unlike on-premise PBX, a VoIP PBX can be accessed anywhere and at any time. Calls to one office number can easily be routed to team members half a world away on their mobile devices or to their remote office locations.

Traditional Business Phone Systems vs. VoIP Phone Services

Traditional business phone systems are plagued by the depreciation of expensive analog equipment and the high operating costs associated with a dedicated team of specialists required to install and manage their operations. A VoIP phone service is simpler and faster to deploy, carries significant total cost of ownership advantages, and comes equipped with advanced business features that are updated via software, not hardware changes.

Business VoIP services bring the functions of a traditional phone system into the modern office with a host of customized features updated regularly.

Extension Dialing

Legacy phone services have long been able to connect employees on a private network via extensions and to reach a person directly by appending that extension to the main business phone number. With VoIP extension dialing, your dedicated employee extension travels with you. You can control how a call is routed- either to your desk phone, your computer, or your mobile device.

Auto Attendant

Auto attendant functions like a virtual receptionist. VoIP customers can direct calls automatically using a software dashboard. Call flows are redirected in an instant and operate on a cadence set by you and your team. 

Ring Groups

On legacy PBX systems, spikes in call volume are difficult to anticipate and frustrating to manage. With VoIP technology, companies can establish ring groups that distribute calls to a pre-specified set of phones on the network. These groups can be configured to dial more numbers when volumes are especially high, increasing the likelihood that your clients’ calls are answered the first time, every time.


Voicemail is ubiquitous in today’s world of communication. Business VoIP services help you control and prioritize your availability in ways regular phone services cannot. Set some calls to ring while routing others to voicemail. Receive email transcriptions for priority numbers. Efficiently screen incoming calls without any interruptions to your workflow. With VoIP voicemail, you are in control of when and how often your phone rings.

VoIP and Unified Communications

Replacing legacy telephone services with a VoIP network doesn’t only mean enjoying greater speed and reliability. VoIP service providers can bundle voice services with a full suite of unified communications that operate on protocols related to IP telephony. These additional services are tethered by a Session Initiation Protocol (SIP) application that brings video, messaging, chat, screen sharing and web conferencing to one platform.

This style of virtual office integration allows your team to make secure business calls on multiple devices, easily access personal and business contacts on one shared network, and remotely host online meetings. By integrating phone systems with other communication channels, unified communications transforms how your team communicates and collaborates on a daily basis.

VoIP and Customer Service

The same custom features and settings that differentiate VoIP solutions from existing legacy systems can empower VoIP solutions to improve your customer support and sales efforts on your call centre channels. Businesses operating inbound or outbound call centres are especially reliant on the speed and uptime of their chosen voice service solution.

VoIP services enhance existing call centre and contact centre capabilities by connecting call centre agents with knowledgeable colleagues via team messaging and giving call centre managers access to up-to-the-second analytics that show customer call pathways and agent response times. Call centre software is just one piece of a fully unified communications strategy.

VoIP and Emergency Services

Phone companies operating PSTNs connect one location-specific phone number to another. VoIP calls by contrast are routed from one IP address to another. This distinction meant that emergency call systems were initially incapable of locating the source of a VoIP call. 8x8 was the first VoIP provider to offer enhanced 911 service (e911) for all of its customers. Using a system of public service answering points (PSAPs), 8x8 was able to deliver address specific information to 911 providers in the United States and Canada. This breakthrough highlights one of the many ways 8x8 has served as a thought leader in VoIP technology over the past two decades.

To learn more about e911 services and other VoIP-specific considerations we recommend this Consumer Guide compiled by the FCC.

The 8x8 Difference

8x8 brings together the most advanced and reliable VoIP services on the market with a complete unified communications suite that includes team messaging, contact centre technology, and a virtual office collaboration platform.

Learn more about our technologies and our dedication to innovation. Or, speak to a member of our sales team today about how we can transform your communications.



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