Voice over IP (VoIP) is a method of sending voice traffic over the public Internet or a private network instead of using legacy PABX equipment over expensive and traditional voice-enabled ISDN lines.

A voip managed services goes one step further, allowing companies to discontinue their local physical or software PBXs. Instead, you can use a cloud-based managed solution where your VoIP equipment, servers, and services are hosted and maintained by a VoIP provider responsible for calls, voice features, and technical support.

The VoIP-as-a-service design model saves companies the expense of investing in real voice equipment and the unnecessary burden on IT equipment to maintain and support the voice platform.

The Three Most Popular Cloud Service Models for VoIP

What is the cloud?

Cloud computing refers to the availability of computer system resources on demand without the user having to directly manage the computer system directly. In other words, it is a platform that you can use to provision virtual computing systems with different characteristics of CPU, memory and storage. These virtual computer systems are available over the network. For example, log in to a cloud computing platform such as Amazon Web Services (AWS) or Google Compute Engine to create a virtual server with the selected characteristics (CPU power, memory, storage space) and the operating system in the Other network services you like.

The result is similar to virtualization, but much larger and has deeper implications. The big advantage here is that you can use all of these computing resources and access them from anywhere as long as you have an Internet connection. The actual physical location of these resources is less important and you may not really know where they are. They can also spread across different data centers in multiple countries or continents. As such, the services are provided or reside in the "cloud".

Cloud Service Model

Cloud computing providers offer services using a variety of service models. Three of them are the most famous. These are software as a service (SaaS), platform as a service (PaaS) and infrastructure as a service (IaaS). These models provide different levels of service to clients in the cloud and are organized in a layered format as shown in the following figure.

IaaS: This model refers to an online service that provides a computing infrastructure to its customers. Online virtual server provisioning is an instance of IaaS. The IaaS platform basically provides the computing infrastructure to create and run your own servers and services as needed. Install and configure software to serve end users. This is generally considered a lower level service. This is not an indicator of quality, it simply means that only the computing infrastructure is provided. Additional services that work must be provisioned, configured, and configured by cloud users. Examples of IaaS services include Amazon Web Services, Microsoft Azure, and Cisco Metacloud.

PaaS: This model provides a platform where users can develop, run and manage their own applications. There is no complexity in building or maintaining a computer system. This is considered a higher level than IaaS because the user does not have to deal with resources, CPU, memory, operating system or other infrastructure. PaaS users are primarily organizations that want to develop their own online services without the hassle of dealing with infrastructure. Examples of PaaS services include Google App Engine and AWS Elastic Beanstalk.

SaaS: This model allows users to access end-user software over the network. Cloud providers manage the infrastructure and platforms that use the software. This is a higher level than PaaS because end users directly use the provided software application. Examples of SaaS include Dropbox, Microsoft Office 365, and cloud-based phone service providers. Click here for a complete list of TeleDynamics cloud communications partners.




Cloud for voice services

The SaaS service model has been used by VoIP providers for several years. Cloud-based unified communications systems offer significant benefits for most companies. Specifically, it has the following advantages.

  • All the benefits of a SIP server that you don't have to maintain in your own data center. This saves infrastructure costs like power redundancy, cooling systems, and rack space.
  • Increased time and cost savings associated with patching and updating the SIP server software, as these services are the responsibility of the provider and are generally included in the subscription costs for VoIP cloud services.
  • No additional hardware is required as customer installations only require SIP endpoints.
  • Dynamic improvement or reduction of the system, according to the needs of your business.
  • No matter how many branches you have, everything is managed from a single centralized location.
  • Individual providers can also use the IaaS or PaaS implementation model to develop their own VoIP services and offer them to their own customer base.
  • Until now, we have explored the different service models available in the cloud and their advantages over VoIP systems. However, only the cloud service model that exists on the Internet was adopted. Different deployment models allow you to have the cloud on your private infrastructure, and we'll cover it in a future article.


With a cloud-based VoIP service, you can deliver communications applications to your business, wherever you are and how many branches you have, with an Internet connection. The three most common cloud service models are IaaS, PaaS, and SaaS.