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by Daniel Harris,
Market Research Associate
Last Updated: December 7, 2016


“Unified communications” (UC) is a buzzword for technologies that connect voice, email, text messaging, instant messaging (IM) and other business communication channels through intuitive user interfaces and software integrations. UC software systems focus communications functionality around the end user and provide a consistent experience across multiple devices (laptops, IP phones, smartphones, tablets, headsets etc.).

Unified-Communications-as-a-Service (UCaaS), meanwhile, is simply a term for cloud-based UC, which is typically delivered on a subscription basis (in other words, you pay per-month rates for user licenses instead of one-time license fees).

This guide is intended to help you research UCaaS solutions for your organization. It covers the following topics:

What Are Unified Communications and UCaaS?
On-Premise UC, UCaaS and Hybrid Deployment Models
UCaaS Functionality
Key Considerations for Buyers

What Are Unified Communications and UCaaS?

Traditional business phone systems primarily focused on managing the voice channel. This created a disjointed experience for employees who had to use other applications for email, instant messaging and so on. Moreover, these systems didn’t offer the flexible configuration settings users need to personalize their various communication methods. Even worse, legacy phone systems were difficult to integrate with other types of business software.

UC emerged around the turn of the millennium, as phone systems designed for VoIP service began to evolve in response to these issues. Unlike traditional phone systems, UC systems put users at the heart of communications. These systems allowed users to manage all workplace communications from a single system with a unified interface, accessible through tablets, smartphones, laptops and a range of other devices.


iPad video conferencing with ShoreTel Mobility 8

In addition to streamlining the user experience across devices, UC systems and cloud-based UCaaS systems also help users manage communications by providing real-time control over their contact preferences (e.g., whether they’re available for a phone conversation). Moreover, UC and UCaaS systems can integrate with customer relationship management (CRM) systems, accounting systems and other vital software categories to add communications capabilities to workflows involving multiple types of software.

The net result in successful UC implementation: new possibilities for collaboration throughout your organization. UC can also reduce the costs associated with using multiple communication systems. For example, instead of paying for a phone system, a video conferencing system and a stand-alone audio conferencing service, under UC, businesses only need a single communications provider.

Here are the most important communications channels managed by UC and UCaaS software systems:

This is just a high-level overview of the basic modes of communication handled by these systems; it is not an exhaustive listing of capabilities. UC and UCaaS systems are capable of extensive functionality and are quite technically complex, with administrator manuals that can be thousands of pages long.

The first UC systems required the deployment of physical hardware, such as servers and switches, on businesses’ premises. Now, organizations can choose between deploying UC on-premise, in the cloud (UCaaS) or both.

On-Premise UC, UCaaS and Hybrid Deployment

The choice between UCaaS and on-premise UC is an important one. Whereas UC was once confined to enterprises with very deep pockets, UCaaS providers make the technology affordable for a much wider range of organizations by significantly cutting upfront costs. UCaaS solutions can also be easier to manage for organizations with limited IT resources.

On the other hand, on-premise UC systems have disaster survivability benefits: They allow for redundant connections to the public switched telephone network (PSTN) for maintaining service during Internet outages.

Some UC and UCaaS providers allow for cloud deployments at certain sites (such as branch locations) and on-premise deployments at others (such as campuses). This is known as the hybrid deployment model.

In the hybrid model, even though the system has been deployed in different ways across multiple sites, it’s still a single system that can be centrally administered (typically, from the main campus). In addition to survivability benefits, hybrid deployments allow businesses to continue using legacy communications equipment in which they’ve already invested heavily.

You’ll need to factor in networking requirements, legacy investments and organizational structure along with costs when deciding whether to go with on-premise, UCaaS or hybrid deployment.

The systems listed on this page are all UCaaS products.

UCaaS Functionality

The following table lists some additional capabilities of UC and UCaaS systems:

Administrator console Administrators have a unified interface for controlling applications and features, as well as for managing the organization’s dial plan across multiple locations and networks.
Desktop client Clients are installed on end users’ desktops or laptops. Users can communicate across multiple channels, and manage both contact preferences and call routing preferences via the client.
Mobile client Extends major communication channels, such as voice calling, instant messaging, email and conferencing, to mobile devices. Users can make and receive calls with mobile devices using their work numbers. Mobile clients also allow users to access the system remotely to manage settings and preferences.
Single identity number Users make and receive calls using a single work number, regardless of whether they’re communicating on a softphone, headset, IP desk phone, smartphone, tablet etc.
Mass notification UC systems can handle mass notifications in emergency scenarios with capabilities such as SMS blasting.
API Most UC platforms offer APIs for extending the functionality of the system through the development of custom applications or integrations.


Buddy list in Nextiva’s VoIP App Interface

Key Considerations for Buyers

The UC marketplace is complex and continually evolving. Keep the following considerations in mind while evaluating vendors to home in on the systems that will best meet your needs.

  • Integrations with office productivity suites. Increasingly, UCaaS providers are developing pre-built integrations with popular office productivity suites, including Microsoft Office 365 and Google Apps for Work. (Such integrations were once a niche filled by middleware vendors.) If you’re already locked into the Google or Microsoft ecosystem, look for vendors that have already done the work of integration so you don’t have to.
  •  
  • Combined UC/contact center deployments. Some UCaaS providers also specialize in deployments for multi-channel contact centers (those that handle communications channels such as email, SMS text, instant messaging, live chat, social media etc.). These vendors can deploy a contact center system that integrates seamlessly with the UC system used by the rest of your organization. Example vendors include RingCentral, ShoreTel, Nextiva, 8x8 and Jive.
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  • Conferencing requirements. The continued evolution of Web conferencing has vastly reduced the costs and technological complexity of both audio and video conferencing. However, UC solutions still differ in the conferencing capabilities they offer users. For instance, not all vendors’ mobile clients can support multi-party video conferencing on tablets and smartphones. Others are limited in their Web conferencing features.

    In particular, the use of WebRTC (an API for browser-based video conferencing) is still evolving. Vendors are actively developing solutions based on WebRTC, while solutions already on the market have implemented it to widely varying degrees. Make sure your short list only includes vendors that offer the conferencing features you need to support your business’s collaboration styles.

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