Connect your PBX to
Crazytels SIP Trunking.

With Instant setup you can connect your on-premise PBX To Crazytels Enterprise Grade VoIP Network within Minutes.
Australia's Best VoIP Trunking Provider.

Looking for a Business SIP
Trunk? Look no Further…

Crazytel is able to connect direct to your on-site PBX within minutes of signing up! Using our Enterprise Grade SIP Trunks, we can have your PBX using our Trunking service in no time! With Outbound & Inbound calls directly to your equipment.

We have customers with just about every PBX system available. Including, FusionPBX, VitalPBX, FreePBX & 3CX and we have many knowledgebase articles to match.


Why should I choose Crazytel SIP Trunking? That’s easy!...

  • $2 Sign-Up Credit
  • No Contracts
  • Australian Owned & Operated
  • National Network with Geographical Redundancy.
  • With Sydney, Brisbane & Melbourne Data Centres you will have the lowest latency possible.
  • No Credit-Card details required on sign-up! Use your free $2.00 credit first before you recharge.
  • We answer your calls within 10 seconds on average!
  • Control all aspects of your SIP Trunk with Crazytels Customer Portal.

Crazytel SIP Trunking Features

SIP Trunking, also referred to as a “SIP Line” & “SIP Trunks” enables your on-site PBX to connect to Crazytel’s VoIP Network. SIP Trunks utilises your Broadband Internet connection instead of using traditional PSTN & ISDN Lines. SIP Trunking is a great way to access benefits of VoIP while making use of your current hardware/PBX.

  • PBX Support

    Crazytel SIP Trunking product works with all major PBX’s including, FusionPBX, VitalPBX, FreePBX and other Asterisk Based systems

  • Direct to IP or Authenticated

    We can send calls direct to your IP address or use SIP registration, depending on your needs. You can change this in your portal 24/7

  • Realtime Divert on Down

    Failover your incoming calls to many types of Destinations (Mobile, Back-up PBX, Voice-mail to email.).

  • NBN & Starlink Ready

    Crazytel SIP Trunking is NBN & Starlink compatible. Be free from the PSTN & ISDN Network.

  • Free Porting

    No matter if a single number, 1300 number, 1800 or even a 100 number range porting in to Crazytels SIP Trunking network is free!

  • Inbound Numbers

    Crazytel has a large database of numbers from Cities to Rural areas. We also have Virtual Mobile Numbers, 1300 & 1800 Numbers and NZ numbers. Purchase via the client portal and choose from a list 24/7.

  • Caller ID

    We support outbound CallerID, both fixed and over stamping. With a user-friendly client portal this is a not a hard task and can be done in seconds.

  • Toll fraud protection

    Know your business is automatically protected by real-time toll fraud monitoring, carrier-grade network security and robust Self-Service account-level call control that you can control in real-time.

  • Protocols

    UDP, TCP, TLS Protocols Support. Alternative SIP Port available (Great for 4G/5G Connections)

Crazytel Business SIP Trunking Plans

When you sign up to a SIP Trunking plan you will automatically be on our P.A.Y.G Plan. Once your ready, you can upgrade and downgrade plans anytime you like from the self-service portal. All Business SIP Trunking plans are Pre-Paid.

P.A.Y.G Plan
Monthly Plan Fee:


Minimum Monthly Charge $0 Critical Information Summary
Call Rates
Channel Limits
  • Unlimited Outbound Channels
Crackers Plan
Monthly Plan Fee:


Minimum Monthly Charge $35 Critical Information Summary
Call Rates
Channel Limits
  • 10 Inbound lines
  • 1 Outbound line
  • Purchase additional outbound lines for $35 per line per month
Crazy 5 Plan Best Seller
Monthly Plan Fee:


Minimum Monthly Charge $149 Critical Information Summary
Call Rates
Channel Limits
  • 10 Inbound lines
  • 5 Outbound lines

Crackers Plan & Crazy 5 Plan cannot be used for Call centre, telemarketing or Outbound Sales use* All pricing includes GST; all calls are billed in one second blocks; no call connection fees; most ATAs, VoIP Gateways, IP phones, Softphones & Virtual PBXs are compatible with our Business SIP Trunks.

Click Here to Sign Up Now
for an Instant Business SIP Trunking Account

What is a SIP Trunk?

Also known as a SIP Line, SIP Trunking - A SIP trunk is the virtual version of an analogue phone line. Using SIP trunks, A SIP Trunk from Crazytel can connect one, two, or twenty channels to your PBX, allowing you to make local, long distance, and international calls over the Internet. If you have an on-premises PBX in your office such as 3cx, FreePBX, Vital PBX and many others, a SIP trunk from Crazytel can be configured on your onsite PBX to allow you to make outbound calls on your existing system, without restrictions on the number of concurrent calls.

Don’t have a PBX? But still need
some basic PBX Functions for
your Business?

Crazytel SIP Trunking product can also work on Softphones, ATAs and VoIP phones
with basic functions as receiving and making calls. We also have additional SIP
Trunking features at no extra cost including.

  • Voicemail to Email
  • Time Conditions