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  4. Numbers, SIP Trunks & Porting

Numbers and SIP trunks

The numbers and lines come with the system

Other providers sell you a phone system, then SIP channels, then numbers, then a porting fee, then a support plan. We run our own voice network in Australian data centres, so the trunks and numbers that connect your 3CX to the world are part of the system and part of the bill. Your existing numbers come with you; new local, 1300 or 1800 numbers are provisioned when you need them.

  • Keep every number you have — landline, 1300, 1800
  • SIP trunks sized to how you actually call
  • New local, 1300 and 1800 numbers when you need them
  • On our own network, hosted in Australia
Get a quote Call 1300 718 857 Included with every phone system

Why choose us

Porting, handled

We run the port from your current carrier, schedule the cutover for a quiet time and stay on the line until the first calls land. Callers notice nothing.

SIP trunks on our network

Channels sized to your real concurrent calls, on infrastructure we own and monitor — not resold from a wholesaler you have never heard of.

Local numbers anywhere

An Adelaide number, a Sydney number, a number in every town you serve — all answered by the same system.

1300 and 1800

A national number for a national business, routed to whichever office or mobile should answer, with the caller paying a local call or nothing.

Direct in-dials for everyone

Every extension can have its own number, so customers ring the person they dealt with last time.

Sized and resized

Growing? Seasonal? We add channels when you need them and take them away when you do not.

Why included beats itemised

Itemised telco bills exist to be confusing. When the numbers, the trunks and the system are one product on one bill, there is one supplier to call when something is wrong, one place to add a number, and no argument about whose fault a dropped call is.

Keeping your PABX

If you have an on-premises system you are not ready to retire, our SIP trunks connect it to the world over the NBN or 4G. When you are ready, the same numbers move to hosted 3CX without changing.

Frequently asked questions

Can I keep my existing phone numbers?

Yes. We port your existing landline and 1300/1800 numbers across to TelcoCentric as part of the switch. Your callers notice nothing.

Is it NBN-ready?

Completely. A hosted phone system is designed for the NBN. If you love your existing PABX, our SIP trunking service keeps it running over the NBN or 4G instead.

How long does number porting take, and will we lose calls?

Local numbers usually port in one to two weeks; 1300 and 1800 numbers can take longer depending on the carrier. We schedule the cutover for a quiet time, your old service keeps working until the moment it switches, and we stay on the line until the first calls land on the new system.

Do you run your own network, or resell someone else's?

Our own. The voice infrastructure your calls run on is owned and operated by TelcoCentric in Australian data centres. That is why we can size trunks properly, see problems before you do, and fix them without opening a ticket with a wholesaler.

Still have questions? Talk to a local specialist — no call centre, no scripts. Contact us

Reviews

What our customers say

5.0 from 37 Google reviews · Reviews as published, with a link back to the original.

★★★★★

We would like to extend our sincere thanks to Luke and the entire TelcoCentric team for their exceptional expertise, professionalism and support throughout the installation of our new phone and fax-to-email system. From the outset, the…

★★★★★

We recently brought our phone system into the 21st century, and the switch has been fantastic. From the first call, the team was responsive, professional, and genuinely helpful in getting everything set up. The onboarding process…

★★★★★

The whole team at TelcoCentric have been fantastic. The support we've received throughout the process has been great. Definitely recommend!

Read all 37 reviews

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Ready to talk about numbers, sip trunks & porting?

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Monday to Friday, 8:30am – 5:30pm ACST. 24/7 support for managed customers. Existing customer with a fault? Go to support.

  • Written, itemised quote within one business day
  • No obligation — we will say if you should stay put
  • Titanium 3CX Partner, one of six in Australia
Whatever you know — "an old on-prem PBX", "Telstra mobiles and no IT support", "not sure" is fine.
What is not working today, or what you are trying to achieve. A sentence or two is plenty.