VoIP Phone System Setup Checklist for Australian Businesses

You’ve decided to move your business phones to VoIP. Now you want to know exactly what happens, in what order, and what could go wrong.

Setting up a VoIP phone system takes six steps: check your network, order your numbers, build your call flow, configure your devices, test everything, then port your number and go live. Most Australian small businesses complete the whole process in two to four weeks, and the bulk of that is waiting on the number port - which happens in the background while your existing phones keep working normally.

Your current number keeps ringing until the moment the port completes. There is no gap, no day without phones, and no point at which customers can’t reach you. That’s the single most common fear about switching, and it’s unfounded when the port is managed properly.

You don’t need an IT team for any of this. Here’s the full sequence.

Before you start: what to have ready

Four pieces of information determine your entire VoIP setup. Confirm all four before you talk to any provider, and you’ll get accurate pricing and a realistic timeline on the first conversation instead of the third.

1. What NBN connection type do you have? FTTP, FTTN, FTTC, HFC or Fixed Wireless. This affects call quality and is the first thing any competent provider will ask. If you don’t know, check your original NBN paperwork or ask your internet provider. FTTP is ideal; FTTN works but is more sensitive to line quality.

2. Which phone numbers do you need to keep? List every number customers actually use - main line, direct lines, fax number if it’s printed anywhere, any 1300 or 1800 numbers. Also note which provider currently supplies each one, because that determines how the port runs. Numbers you don’t list won’t be ported, and getting them back later is harder.

3. How many users, and how many simultaneous calls? Users means people who need an extension. Simultaneous calls means how many conversations can happen at once - usually much lower than your user count. A ten-person business with two people on the phone at any given time doesn’t need ten call paths.

4. Which features are genuinely required? Call recording, an IVR menu / Auto Attendant (“press 1 for sales”), after-hours routing, ring groups, voicemail-to-email, call queues, a 1300 number. Separate the must-haves from the nice-to-haves now, because feature lists drive pricing tiers.

This takes about ten minutes. Write the answers down. With those four things in hand, any provider can give you an accurate quote and a realistic go-live date immediately.

Step 1 - Check your network

VoIP needs a stable internet connection, a router that supports QoS, and ethernet cabling to desk phones. Bandwidth is almost never the constraint - a single call uses only around 80–100 kbps.

Ten simultaneous calls need roughly 1 Mbps. Any functioning NBN service has that many times over. What matters is consistency, not speed: latency, jitter and packet loss determine call quality, and none of them appears on a standard speed test.

Minimum requirements:

Four gotchas that cause most first-week problems:

• SIP ALG enabled on the router. This feature was designed to help VoIP and almost always breaks it - causing one-way audio, dropped calls and registration failures. Find it in your router’s advanced settings and turn it off before go-live, not after.
• Desk phones on Wi-Fi. Wi-Fi produces variable latency and interference. Run ethernet to every desk phone. Most business handsets have a pass-through port so the phone and the computer share one wall socket.
• No power backup. Unlike an old copper landline, VoIP phones stop working in a blackout because the router and handsets both need power. A small UPS on the router and switch keeps phones alive through short outages. Worth doing if you’re a business where a dead phone line costs money.
• An underpowered or ancient router. If your router is more than five years old or was supplied free with a residential plan, it may not realise the full potential of network requirements, and it may not support QoS at all. This is the cheapest upgrade with the biggest effect on call quality.

If you’d rather not manage the connection and the phones separately, VoIPLine provides NBN internet alongside voice, which means one provider is responsible for both when something goes wrong.

Step 2 - Choose and order your phone numbers

You have three options: port your existing numbers across, get new local numbers, or add a 1300/1800 number. Most businesses do a combination.

Port your existing numbers. Keep the number already printed on your vehicles, invoices and Google listing. Your current provider cannot refuse a valid port request - number portability is a regulatory obligation under Chapter 10 of the ACMA’s Telecommunications Numbering Plan, and they can’t block it because you owe them money or because they’d rather keep your business. The old service stays live until the port completes, so there’s no gap in service.

Get new local numbers. A new 02, 03, 07 or 08 number in your area code, available immediately. Useful for new locations, new departments, or for running the new system in parallel while you test it before porting. Many businesses take a new number first precisely so they can go live gradually.

Add a 1300 or 1800 number. A 1300 number charges callers a local-rate fee; 1800 is free to the caller. Both work nationally regardless of where your business physically sits, and both can route to different destinations by time of day or caller location. Note that 1300 and 1800 numbers can be registered separately through the ACMA’s Smart Numbers system - the business that registered the number owns it, not the telco delivering it.

What porting requires from you: a recent bill from your current provider, the exact account name and address as it appears on their records, the phone numbers explicitly listed and a signed porting authority. The single most common cause of a rejected port is a mismatch between what you write on the form and what your current provider has on file - an abbreviated business name, an old address, a trading name instead of the registered entity. Copy the details from the bill exactly.

VoIPLine handles the entire port on your behalf. Details are on our number porting page.

Step 3 - Set up your call flow

A call flow is the path a call takes from the moment it arrives: which phones ring, in what order, for how long, and what happens if nobody answers. This is configured in the customer portal before go-live, not on the phones themselves.

This is the part that genuinely changes how your business operates, and it’s worth ten minutes of thought rather than accepting a default. Three setups cover the large majority of small businesses:

Direct to extension - simplest. Each person has their own number or extension, calls go straight to them, unanswered calls go to voicemail. Best for professional services and small teams where callers know who they want.

Ring group - ring everyone at once. A call to the main line rings every available handset until someone picks up, then falls through to voicemail or a mobile. Best for small teams where anyone can help the caller. Most businesses under ten staff should start here.

IVR menu - route by department. “Press 1 for sales, 2 for accounts.” Best once you have distinct departments and enough call volume that misrouted calls are wasting people’s time. Below about fifteen staff, an IVR often slows callers down more than it helps them - a ring group is usually the better answer.

Also configure before go-live:

• After-hours routing - what happens outside business hours, and on public holidays.
• Voicemail-to-email - so messages reach people who aren’t at their desk.
• Overflow to mobile - where calls go if the office is unreachable.
• Outbound caller ID - which number customers see when staff call out. Easy to overlook and confusing for customers if it’s wrong.

VoIPLine’s knowledge base has a step-by-step call flow setup guide, and our hosted PBX handles all of the above from one portal.

Step 4 - Configure your devices

You have three ways to make and take calls: physical desk phones, a softphone app, or Microsoft Teams. Many businesses use more than one - desk phones at reception, the app for staff who move around.

Desk phones. Traditional handsets for people who are at a desk all day. VoIPLine auto-provisions Yealink and Grandstream handsets remotely, which means the configuration is pushed to the phone over the internet - you plug it in, it collects its settings, and it’s ready. No manual SIP credentials, no per-phone setup, no technician visit. Our VoIP phones and accessories range covers handsets known to work well on the platform.

Softphone app. Webphone runs in a browser, on desktop or on mobile, with calls, SMS and call history in one window. No hardware, no installation if you use the browser version, and staff can work from anywhere using their business number. This is what makes hybrid teams workable, and it’s the fastest way to get new starters operational.

Microsoft Teams. If your team already lives in Teams, Direct Routing connects your business numbers to it so staff make and receive ordinary phone calls inside the app they already have open.

Practical sequencing: plug the desk phones in and let them provision while you’re still testing, and get the app installed on everyone’s phone before go-live day rather than during it. Order handsets early - hardware delivery is more likely to delay your go-live than anything in the configuration.

Step 5 - Test before go-live

Test the full system on a temporary number before the port completes. Everything below can be verified while your old phones are still running normally, which means any problem gets fixed before it can affect a customer.

Work through this list:

• Inbound call routing. Call the test number from an outside line. Does the right phone ring? Does the ring group behave as expected? Does the IVR route correctly?
• Outbound caller ID. Call a mobile from each extension and check what number displays. This is the most frequently missed item on the list.
• Voicemail. Leave a message. Confirm it records, and that the email notification arrives at the right address.
• After-hours routing. Temporarily set business hours to exclude the current time and call in. Confirm you get the after-hours treatment rather than a ringing phone in an empty office.
• Call transfers and hold. Test a transfer between two extensions, and put a call on hold and retrieve it. Simple, frequently broken, highly visible to customers.
• Call quality. Make several calls of a few minutes each, during a busy period. Listen for choppiness, delay or dropouts. If anything sounds wrong, fix it now - the usual culprits are SIP ALG, Wi-Fi handsets and QoS not being enabled.
• Mobile and remote access. Have someone test the app from outside the office, on mobile data rather than office Wi-Fi.

Do this with two or three people, not one. Problems with ring groups and transfers only show up when multiple phones are involved.

Step 6 - Port your number and go live

Submit the port once testing is complete. Individual local numbers generally port within 8 to 15 business days, and more complex ports involving multiple numbers can take up to 30 days. Your existing service stays fully active the entire time.

Those timeframes come from the ACMA’s own guidance, and they’re business days, not calendar days - a straightforward single-number port realistically means two to three weeks from submission. Simple ports often complete faster, but plan on the longer figure and treat an early completion as a bonus. If you have a 1300 or 1800 number in the mix, allow extra time: inbound numbers run through a separate process.

You’ll be told the cutover date in advance. On the day, calls to your number simply start arriving on the new system. There’s no outage and no period where the number doesn’t work.

Go-live day checklist:

• Confirm the port has completed. Your provider will notify you. Don’t assume.
• Call the ported number from an external mobile. Check it rings the right place.
• Make an outbound call and confirm the correct caller ID displays.
• Test voicemail once more on the live number.
• Brief your staff. Fifteen minutes covering how to transfer, how to use voicemail, and how to get to the app. This single step prevents most of the week-one support calls.
• Cancel the old service. Only after the port has completed and been verified - never before. Cancelling early can cause the number to be released rather than ported, and recovering it is difficult.
• Remove old hardware and decommission redundant lines so you stop paying for them.

Quick-reference setup checklist

Before you start

• ☐ NBN connection type identified
• ☐ All numbers to port listed, with current provider for each
• ☐ User count and simultaneous call requirement decided
• ☐ Must-have features separated from nice-to-haves

Step 1 - Network

• ☐ Router supports QoS, and QoS is enabled
• ☐ SIP ALG disabled
• ☐ Ethernet run to every desk phone
• ☐ UPS on router and switch (recommended)

Step 2 - Numbers

• ☐ Porting decision made for each existing number
• ☐ Recent bill and exact account details gathered
• ☐ New local or 1300/1800 numbers ordered if needed
• ☐ Porting authority signed and submitted

Step 3 - Call flow

• ☐ Main line routing configured (direct, ring group or IVR)
• ☐ After-hours and public holiday routing set
• ☐ Voicemail and voicemail-to-email configured
• ☐ Outbound caller ID set correctly for each user

Step 4 - Devices

• ☐ Handsets ordered and delivered
• ☐ Desk phones plugged in and auto-provisioned
• ☐ Softphone app installed for all staff
• ☐ Microsoft Teams connected (if applicable)

Step 5 - Testing

• ☐ Inbound routing tested
• ☐ Outbound caller ID verified
• ☐ Voicemail tested
• ☐ After-hours routing tested
• ☐ Transfers and hold tested
• ☐ Call quality checked during a busy period
• ☐ Remote and mobile access tested

Step 6 - Go live

• ☐ Port completion confirmed
• ☐ Inbound and outbound tested on ported number
• ☐ Staff briefed
• ☐ Old service cancelled (only after port confirmed)
• ☐ Old hardware removed

Frequently asked questions

How long does it take to set up a VoIP system in Australia?

A VoIP system can be configured and making calls within one to two business days on a new number. If you’re porting an existing number, allow two to four weeks end to end - the ACMA’s guidance is that individual local number ports generally complete within 8 to 15 business days, with complex multi-number ports taking up to 30 days. Your existing phones keep working throughout, so the waiting period causes no disruption.

Can I keep my existing phone number when switching to VoIP?

Yes. Number portability is a regulatory obligation in Australia under Chapter 10 of the ACMA’s Telecommunications Numbering Plan. Your current provider cannot refuse a valid port request, including if you have an outstanding balance with them. You’ll need a recent bill and your exact account details - the account name and address must match your current provider’s records precisely, as mismatches are the most common cause of port rejections.

Do I need an IT person to set up VoIP?

For most small businesses, no. Handsets are auto-provisioned remotely, so they configure themselves when plugged in, and call flows are set up through a web portal rather than on the phones. The two things worth checking are that your router supports QoS and that SIP ALG is disabled - your provider can walk you through both. Larger deployments with VLANs, multiple sites or complex integrations benefit from IT involvement.

What happens to my calls during the number porting process?

Nothing changes until the port completes. Your existing number continues to work normally on your old service for the entire porting period. On the scheduled cutover date, calls to that number begin arriving on the new system instead. There is no gap, no downtime, and no period during which customers can’t reach you. Don’t cancel your old service before the port is confirmed complete.

What equipment do I need to get started with VoIP?

At minimum, an internet connection; a good-to-have is a router that supports QoS. Beyond that, it’s optional: desk phones for people at a fixed desk, or nothing at all if staff use the softphone app on computers and mobiles. A UPS for the router is recommended so phones stay available during short power outages. Many Australian businesses start with the app alone and add handsets later once they know who actually needs one.

Ready to switch?

The whole process comes down to one afternoon of preparation, a few days of configuration and testing, and a number port that runs quietly in the background while your current phones keep working.

VoIPLine handles the porting, provisions your handsets remotely, and gives you the portal to build your call flow - with Australian-based support if you get stuck at any step.

Start a free trial and set up a test system before you commit to anything.