Business Voice

At Prosum, We Specialise in Business Voice Solutions, Communication System Advice & Installations.

We help businesses improve their communications and strive to help organisations get the most from the latest communications technology.

Our Business Voice Solutions

On-Premises PBX Telephone Systems

We’ve partnered with industry-leading firms to provide you with the best products for your office or contact centre phone system.


Hosted PBX Telephone Systems

Our enterprise-grade, low cost & secure Hosted PBX removes the need to buy and manage PBX equipment on your premises.


SIP Trunks

Prosum’s SIP Trunks are a smart and cost-effective way to connect your existing PBX to the PSTN.


Inbound Numbers

Broaden your business reach and take control with our 1300 & 1800 Inbound Number services.


Why Partner with Prosum for your business voice needs?

We Know Communications.

We're Experts At What We Do

  • 20+ years of experience designing, installing, servicing and maintaining a range of ICT solutions.
  • There’s no outsourcing. We have a diverse range of in-house skilled & certified technicians.

We're Always Ready To Help

  • Businesses of all sizes & across all industries, metro & regional areas, Australia wide.
  • From the first contact through to ongoing technical support, we’re with you every step of the way.

read why our clients choose us

  • We conducted a review for potential VOIP providers that could implement a reliable and feature rich cloud based IP Telephony platform. After reviewing other providers, we selected PROSUM who was able to successfully transition our College to a Cloud IP Telephony platform. PROSUM’s expertise is of the highest standard and I have no issues in recommending their solutions and services. Staff are particularly impressed with the high quality audio afforded by the HD handsets and due to the outstanding clarity, wonder if the other party is still there as there is no ‘pops’ or ‘clicks’ on the line.


Ready to improve your business communications?

Call us on 1800 007 229 or fill out our online form to request a call-back.