Business SIP Trunk Provider Australia-Wide

A SIP trunk is a business phone line delivered over the internet instead of copper. It connects your PBX to the public phone network using SIP (Session Initiation Protocol), so your business makes and receives calls over VoIP while keeping its existing phone system and handsets.

Usually, yes. Most IP PBXs support SIP trunks, including systems from Avaya, NEC, Panasonic and Mitel. Some need a SIP trunk licence first (Avaya IP Office does), and older PBXs may need extra hardware or an upgrade. Tell us your PBX make and model and we’ll check, and include any licence you need in the quote.

A PBX (private branch exchange) is the phone system inside your business. It runs extensions, transfers, hunt groups and voicemail, and routes calls between staff. A SIP trunk is the line that connects that PBX to everyone else, over the internet instead of copper. If your PBX sits in your office, it needs a SIP trunk or traditional lines to make and take outside calls.

It can be, depending on how many calls you make and what you pay now. You pay per channel rather than per copper line, on one of two plans. On our Standard pay-as-you-go plan, you pay a line fee per channel and then for each call. On our Premium plan, a fixed fee per channel covers local, national, Australian mobile and 13/1300 calls.

It depends on the plan and how many channels you need, so we quote each business separately. Request a quote and we’ll recommend a plan and give you the monthly cost in writing.

A channel, also called a call path, carries one call at a time, incoming or outgoing. With 8 channels, you can have up to 8 calls at once. You can add channels as your call volume grows.

As many as the calls your business has going at once in its busiest hour. Your PBX call logs or phone bills usually show this, and we’ll work it out with you before we quote.

Each call needs at least 100 kbps free in both directions, with no packet loss and a ping under 150 ms. So 10 calls at once need about 1 Mbps up and down to spare. We recommend a business NBN or fibre connection, and we check yours before you switch.

Yes. We port your numbers from your current provider. Porting a single number usually takes 4 to 6 weeks, or 4 to 8 weeks for a complex port. It runs alongside the setup, and your current provider’s process can affect the date.

Yes, with one of our two fax services. A fax trunk keeps your fax machine working over the internet. It connects through an analogue adapter (ATA), which we can supply at extra cost, and you pay for each fax you send. Fax to email does away with the machine: faxes arrive in your inbox as PDF attachments, and you send them from your email.

Either way, you can port your existing fax number. Our guide shows how to send a fax from email.

Connection usually takes 5 to 20 business days from when we accept your application, and sometimes less. If you’re moving numbers across, the port is lodged at the same time.

Security depends mostly on how your PBX, router and firewall are set up, so we check those as part of the setup. If you need a new firewall, we supply and set up Sophos firewalls. Our SIP trunks use TLS encryption. Our guide to protecting NEC phone systems from cyberattacks covers steps that apply to most PBXs, such as a firewall and international call restrictions. For wider protection, we also offer managed cyber security.