OnPremise PBX

On-premise PBX is also known as an IP-PBX phone system. It is similar to a traditional PBX system that resides at a location, such as a computer equipment room or phone closet. The main difference is that IP routing is done with more current technology. The signaling is done with an IP phone to the IP-PBX server using a LAN. Calls can go through a traditional phone company as well as voice over Internet (VoIP) using SIP trunking.

The provider can be the one that already provides service, though a SIP trunk can be configured for use with an Internet service telephone provider (ISTP).


  • New open source feature sets can be added without any license fees with some systems
  • Current carrier does not have to be changed
  • VoIP trunks can be added to save on calling costs
  • Server ownership reduces expenses over time
  • No DIY time on the part of the customer
    Professional training of staff on new IP-PBX system is handled by the provider of the system
  • With SIP trunking, loss of Internet or catastrophic event has reduced affect on operations because calls can be sent to another number or a mobile phone.
  • Lower monthly cost after expenses are covered
  • Ability to SIP trunk to get lower cost calls
  • On-premise IP-PBX provider will qualify network
  • On-premise IP-PBX provider will install and program IP-PBX
  • On-premise IP-PBX will train staff on feature use and “best practices"


  • On-premise IP-PBX needs a provider who can manage it properly
  • Expansions may result in complicated projects depending upon the provider
  • On premise IP-PBX manufacturer could go out of business, leaving problems with managing root problems
  • Technician may need to be called for upgrades and patches on software
  • Loss of power or PBX failure will result in callers not being able to get through, which stops business operations unless you have a SIP provider
  • Higher initial cost and set-up cost
  • Potentially higher maintenance costs

Hosted PBX

Hosted PBX or hosted VoIP, is where the provider is responsible for housing the IP-PBX as well as handling the technology required to provide the services to the phone system. The desk sets will plug into your network and are connected to the provider’s network.

SIP Trunks

We can help you get better reliability and simpler operations at scale with the first software-centric SIP carrier.  Enable your organization to utilize voice and messaging services with the nation’s largest network reach for carrier-grade SIP trunking service for IP-PBX systems and analog/digital telephone adapters.

On-Premise PBX
We work with various partners to provide your company on site phone systems. Please contact us to help you locate a provider that works best for your organization.

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