Business SIP Trunks

One plan. No Contracts. Use your own PBX, softphone, IP phone, and gateways. No monthly fees, no connection fees. Don't pay more just because you're a business.

Pre-paid Sip Trunks

Calls to Australian Mobiles only 5c a minute!

per month - Pay as you Go


Some Interesting Facts:
All pricing includes GST; all calls are billed in one second blocks; no call connection fees. Most ATAs, VoIP Gateways, IP phones, Soft Phones & Virtual PBXs are compatible with our Sip Trunks.

Click here to see the Critical Information Summary for full details.

Unlimited Channels!

Want to register more than one device? With Crazytel Business SIP Trunks, all accounts come with ten channels included - but you can change this in your portal anytime. We also offer unlimited SIP endpoints (device registrations).

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Quick Pricing / Feature Overview

Here you will find some more information on our Business Sip Trunk Plan.


per month
+ $1.00 Setup Fee.

Phone Numbers

All Australian Capital City DIDs (phone numbers) are only $1.00 a month, including GST. Have as many as you like


No Charge

SIP Registrations

You can have unlimited SIP endpoints (registrations) there is no fee/charge for this service.


per Single CAT A Port

Keep Your Number

Bring your existing telephone number over to Crazytel. Porting fee & monthly fee of $1.00 applies*

International Calling

Crazytel has some of the cheapest International Rates in Australia. With some of the best international Tier 1 Carriers interconnections. Stop paying to much.!

Crazytel Business
SIP Trunking Features

We also offer the following services to cover your most demanding

Instant Number

Order Australian DIDs 24/7 with instant provisioning.

Automatic Location
Based Routing

You will always be automatically routed to the closest POP for the best performance.


Our Business SIP Trunks are compatible with most SIP-enabled PBX systems.


All of our locations are joined. So if any of our networks go down, you will be routed to the second-closest site within 60 seconds.


We support G711 & G729 Codecs


24/7 user account to view analytics in real-time.

SIP trunking

Frequently asked questions

Do I need internet?

Yes! You will need a reliable internet connection. Crazytel does not sell internet products. There are many internet providers to choose from if you don't currently have internet.

What happens if my internet goes down?

Your SIP registrations will drop. Call forward will still work if it has been configured through our portal. We suggest if your telephone is essential, for you to invest in a 4G backup service.

What is the quality like?

If you have a reliable internet connection, the quality is just like your mobile phone or your PSTN line (and often better).

Is it reliable?

Yes! Crazytel has a quadruple redundancy network - we are one of the few Australian companies that has such an extensive enterprise failover network.

Is there a minimum monthly spend?

No! Our Business SIP trunks are 100% pre-paid pay as you go. If you don't use our service, you don't pay! If you have an active DID(s) on your account, you will still be charged for your DID's monthly fee regardless of use.

Ready To Get Started?

Receive a free $2.00 signup bonus to test our network. Pay nothing - we don't ask for credit card information. Sign up and use! And if you are 100% happy you can recharge instantly by PayPal or credit card.

Signup Today