office phone Systems

Australia’s leading supplier of traditional, hosted & contact centre office phone systems.

Prosum Is Dedicated To Helping You Find The Best Telephone System Solution For Your Budget

With end-to-end dedicated Australian support.

Hosted PBX Phone Systems

On-Site Telephone Systems

Contact Centre Phone Systems

VoiP Telephone Systems

Let’s Talk About What Prosum Can Do For You.

Contact us for your free consultation & tailored telephone system solution today.

1800 007 229

Are You Looking To Upgrade Or Invest In A New Telephone System?

We can help whether you want to reduce your call costs, need a simple VoIP telephone system or a full unified communications suite.

Prosum can tailor a telephony solution to meet your unique requirements – now and in the future. In the cloud or on your premises.

Sip trunks

From the initial consultation right through to installation and ongoing support, we take care of everything. And, all of our expert staff are based in Australia, so you’ll get the ongoing support and training you need.

  • Request A Free Consultation

    Or Call us on 1800 007 229 Today!

what we can do for your business

Fully-Featured On-Site & Hosted PBX Systems

Office Phone Systems for Call Centres

Installations & Phone System Maintenance

Onsite Service & Help Desk Support

Business Phone Lines & SIP Trunks

Business-Grade NBN & Fibre Internet

When It Comes To Choosing The Right Provider For Your Business Phone System, You Can Count On Prosum.

Since 1998, we’ve been helping businesses of all shapes and sizes with their communication needs – in Melbourne and Australia-wide.

We’ve partnered with industry-leading firms to provide you with the best products for your office or contact centre. We offer outstanding product quality, choice and technical support, all backed by manufacturers’ warranties.  And our in-depth knowledge of these products means you get exactly the system you need.


Contact Centre Office phone systems

NEC On-Premises office phone systemsPay-as-you-go technical SupportBroadsoft Hosted Office Phone Systems


Why Prosum for your telephone system needs?

Spot-on Solutions

20+ Years of experience designing, servicing and maintaining the best end-to-end phone system solutions for organisations of all sizes, Australia-wide.

Awesome Customer Service

We’re always ready to help. From the initial consultation right through to installation and ongoing support, we’re with you every step of the way.


  • Thank you to Dino, Chris & the Prosum team for installing our hosted phone system. Your team is amazing, extremely helpful and have delivered a product that is second to none. We had previously dealt with other providers and their communications team, network and equipment do not compare to what we have received through Prosum. Elite Property Management highly recommends you. Thank you again.


Request A Free Consultation Today

1800 007 229