Sip Trunks

Reliable SIP connectivity for your PBX phone system

Quick & Easy to Setup

Keeps Your Current PBX

Flexible Call Plans & Low Call Rates

No-Fuss Cancellation

Get high quality, scalable telephone lines and affordable monthly call plans for your PBX phone system.

1800 007 229

SIP Trunk Plans

Enjoy immediate cost savings with our SIP Trunk Call Plans

With flexible PAYG & Unlimited Call Plans, there’s a solution for every business.

Prosum SIP TrunksPay-as-you-go for all the calls you make every month within Australia.

Starter Bundle

$15.00 mo.

  • Includes up to 5 lines.
  • $3.00 thereafter per line.

Call Rates

  • Local calls: $0.10 per call
  • National calls: $0.05 per minute
  • Fixed to mobile: $0.13 per minute
  • 13/1300 outbound: $0.30 per call

Sip Trunking

Make unlimited calls to local, national & fixed to mobiles within Australia.

Starter Bundle

$53.00 mo.

  • Includes 1 line.
  • Unlimited calls.

Call Rates

13/1300 outbound: $0.30 per call

Prosum SIP Trunks

Keep or purchase numbers.

  • Single DID Number: $1.00 month
  • 100 DID numbers: $35.00 month
  • Transfer your number to Prosum: $195.00 once-off cost

*Number porting is subject to your existing carrier’s number porting arrangement.

All pricing is ex. GST

Need a custom SIP Trunk Plan?

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

The Smart & Cost-Effective Alternative to ISDN

See Your Savings Immediately

Say goodbye to high phone line rental costs and save with flexible SIP Trunk call plans & low-cost call rates.

Scale as Needed

As your business grows, add additional call capacity quickly & easily when and where you need it.

Experience High-Quality Calls

Your private, dedicated bandwidth with QoS, ensures your voice calls are always heard crystal clear.

Keep your calls flowing

Unplanned disruptions? Redirect your calls to your chosen recovery site or mobile number.


Direct Routing for MS Teams

Integrate SIP into MS Teams & transform it into a complete PBX replacement.

Keep Your Current PBX

No need for costly hardware updates. Our SIP Trunks ensure broad compatibility.



We Help Businesses Like Yours Achieve Success

25+ Years Experience

100% Australian Owned

Carrier-Grade Network

Award-Winning Support

  • "Your team is amazing, extremely helpful and have delivered a product that is second to none"


Switch your business to SIP Trunking and start cutting costs immediately.

And, with ISDN services coming to an end, there’s no better time to switch your business phone system to Prosum’s SIP Trunks.

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

  • Contact a SIP Expert

    Fill out the online form with your details to request a call-back.