Sip Trunks

Business-Grade SIP Trunks

High Quality, Cost-Effective Telephone Lines That Scale With Your Business.


    Contact a SIP expert online or call us on 1800 007 229 to find out more.

Your smartest business choice is to save money when you switch to Prosum SIP trunks for your business communication needs.

Prosum SIP trunks replace traditional PSTN/ISDN telephone lines reducing line rental fees and call charges, saving you a fortune in ongoing costs.

They integrate seamlessly with a wide range of PBX systems and are easily scalable, so they grow along with your business.

Benefits of Prosum SIP Trunks for your business

  • Save on call costs and line rental.
  • Keep and use your existing phone system.
  • Enjoy crystal clear voice calls.
  • Carry over your number from other providers.
  • Scale your telephone lines quickly & easily.
  • Flexible pricing.
  • 24/7 Australian based support.

Who is it for?

Prosum SIP trunks are suitable for small to large organisations looking for high quality, cost-effective, scalable telephony access.

Prosum SIP Trunking Plans & Pricing


We offer the flexibility of two plans. Pay-as-you-go SIP trunks & only pay for what you use and nothing more, or predictable monthly plans for peace of mind.

(All pricing is ex.GST)

Pay-As-You-Go Plan

Pay-as-you-go for all the calls you make every month within Australia using our LOW call rates with per second billing.

  • 5  SIP Lines – $15.00 mo.

  • 10 SIP Lines – $30.00 mo.

  • 20 SIP Lines – $60.00 mo.

  • 30 SIP Lines – $90.00 mo.

Unlimited Call Plan

Our predictable monthly payment plan includes UNLIMITED calls to local, national & mobiles within Australia.

  • 5  SIP Lines – $265.00 mo.

  • 10 SIP Lines – $530.00 mo.

  • 20 SIP Lines – $1060.00 mo.

  • 30 SIP Lines – $1590.00 mo.

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

Optional Add-Ons

  • DID Numbers: 0.39c per number/per mo.
  • Number Porting: $195.00 once-off cost.

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

Questions? Talk to a SIP expert on 1800 007 229.


Why Prosum for SIP Trunks?

  • Australian SIP Service Provider

  • Highly Reliable Service

  • 99.99% SLA’s on SIP Trunks

  • 24/7 Australian Based Support

  • Flexible Call Plans

  • No Lock-in Contracts

  • Cancel Plan Anytime

What our customers say about us

  • Thank you to Dino, Chris & the Prosum team. 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.