Like so many modern advances in
information technology (IT), VoIP is one of those technologies that everybody
has heard of but very few know what it is, how it works, or why they might need
it. Regardless, VoIP is pervasive and is part of just about every
communications system and every call that we make.

Below we take a brief look at what VoIP is, its illustrious
journey over the last two decades, and what new advances in VoIP technology we can expect to see.

What is SD-WAN?

The software-defined wide-area network (SD-WAN or SDWAN) isa specific application of software-defined networking (SDN) technology appliedto WAN connections such as broadband internet, 4G, LTE, or MPLS. It connectsenterprise networks – including branch offices and data centers – over largegeographic distances.

AllSD-WAN solutions today should include the following features:

  • A central controller that establishes network-wide policies and determines roles for each network device under management.
  • Commodity vanilla hardware runs the networking function.

Hardware vs. Cloud-Based Solutions

Cloud-BasedSD-WAN Solution:

SD-WAN As A Service(Cloudbase) is a subscription- based service delivered to customers as amanaged service using software orchestration and is called SD-WAN as a Service.

Many different networking vendors and service providers areworking on SD-WAN platforms and services. Some of the operators of SD-WANservices include AT&T, CenturyLink, Colt, Masergy, Singtel, Sprint, andVerizon. Leading providers of SD-WAN platforms and orchestration softwareinclude Ciena, Cisco, VeloCloud, Silver Peak, Versa, and Viptela — among manyothers.

SD-WAN as a Service can be appealing to end users andenterprises that don’t want to manage the WAN network or applications and wouldprefer to outsource these services to a service provider.

SD-WAN Orchestration – In order to deliver SD-WAN as aservice using orchestration, a service provider needs an SD-WAN orchestrationplatform to control and manage the service. This typically involves somecombination of SDN controller and network virtualization software that canautomate the provisioning and operation of the software and elements required,many of which would be based in the cloud.

One of the main goals of SD-WAN orchestration in the cloudis to enable customer provisioning, whereby a customer could go to a Web portaland order services that can be automatically configured and delivered with theSD-WAN platform, without requiring human intervention.

Pros andCons of a Cloud-Based Solution:


  • Adapts both site-to-site VPN and public-cloudtraffic to changing network performance
  • Compliments existing firewall/security
  • Optimizes application performance and quality
  • Encrypts all network traffic and maximizesbandwidth
  • Enables greater simplicity with a single portalinterface to manage multiple connected services
  • Leverages built-in reliability via routingprotocols that allow your network to adjust to traffic demands
  • Gateways SD-WAN Cloud Connect for directconnectivity to leading Cloud Service Providers (CSPs) and Network Ecosystem


  • Not ideal for Companies looking for NetworkControl
  • Monthly recurring Subscription fee
  • Interop limitation with certain Premise basedFW/UTM

SD WAN – Premise-based:

SD-WAN premise-based is essentially a virtual appliance, itbolts onto existing product offerings sucg as routers, firewalls, etc.Premises-based SD-WANs can be cost-effective solutions for smaller, localizedbusinesses. These solutions create a virtual IP network between thevendor-proprietary appliances, giving them control of network packets from endto end.

Pros andCons of a Hardware/Premise-Based Solution:


  • Low Cost
  • Familiar Vendor
  • Bolt-on
  • Usually lower cost than MPLS
  • Adapts site-to-site traffic to changing networkperformance (but generally not public cloud applications)
  • Strong QoS for site-to-site (not cloud) traffic,as long as network bandwidth is 100% stable (generally only SLA-backed fiber orT1s)
  • All-in-one box for firewalling, VPNs, DHCP, NATand other network edge needs


  • No real-time adaption to ISP issue to CloudServices
  • Ineffective (upload-only, fixed rate) QoS
  • Ineffective QoS for cloud traffic like VoIP,VDI/DaaS, and SaaS
  • Non-seamless or no network performanceadaptation for real-time public cloud traffic
  • Yearly maintenance/support fees
  • Typically, highly complex, requiring lots of configurationand fine-tuning

Voice and DataTechnology and Services in New England

If you arelooking for a complete VoIP service provider for your small or medium businessin the greater New England area, then contact Barry Voice and Data Communication.We offer desktop and mobile communications, internet and carrier telephoneservices, and managed cloud services.

To find outmore or to schedule a consultation call us at 888-853-7120. You can also send amessage on our contact page.