Your phone system should work as hard as you do.
Whether you're replacing an old phone system or setting up a modern office from scratch, we make business communication simple. Crystal-clear calls, seamless video meetings, and hardware that just works — all fully managed by your Adelaide-based IT team.
In short
What is Microsoft Teams Phone and SIP trunking?
Microsoft Teams Phone turns Teams into a full business phone system (PBX) for making and receiving calls, while SIP trunking delivers those calls over the internet instead of traditional phone lines. Otaris provides cloud-based voice and video conferencing for Adelaide businesses, including Teams Phone, SIP trunking with unlimited local, national and mobile calls, number porting, and Yealink desk and boardroom hardware.
Phone Systems Shouldn't Be This Complicated
We hear the same frustrations from business owners every week. Their phone system is outdated, unreliable, or cobbled together from multiple providers. Calls drop, video meetings freeze, and no one knows who to call when something goes wrong. Sound familiar?
70% Say Poor Communication Tools Hurt Customer Satisfaction
Old PBX systems are office-bound and expensive to maintain — TAPS ran one from Beverley for 20 staff before it was virtualised onto 3CX, and Top Stairs' desk-tied system before Microsoft Teams Phone. Every dropped call or unreachable staff member while working from home is a customer who noticed.
You're Not Sure What You Actually Need
Teams Phone? SIP trunking? On-premise PBX? Cloud-hosted 3CX? The options are overwhelming, and every provider seems to speak a different language. You just want phones that work and video meetings that don't freeze — without needing a telecommunications degree to set it up.
Communication Should Be Effortless
Your team shouldn't have to think about how they make a call or join a meeting. Whether they're in the office, at home, or on the road, business communication should just work — reliably, clearly, and simply.
We've Upgraded Hundreds of Businesses
At Otaris, we've helped businesses across Adelaide and Australia move from outdated phone systems to modern, cloud-based communications. We handle the entire process — from choosing the right platform and hardware to porting your numbers, configuring call flows, and training your team.
We don't just sell you a phone system and walk away. We manage it as part of your IT environment, which means one team handles your phones, your network, your security, and your support. No finger-pointing between providers, no separate bills for separate systems — just one relationship that covers everything.
Fully Managed
We set up, configure, monitor, and support your phone system as part of your IT plan. No separate contracts or providers.
Adelaide-Based Support
When something isn't working, you call your team — the same people who manage the rest of your IT.
Legacy Migration Experts
TAPS moved a fragmented, office-bound phone setup onto virtualised 3CX; Top Stairs moved theirs onto Microsoft Teams Phone with calls following the person, not the desk. Both are on our case studies page, named, with the before and after.
Flexible Options
Unlimited call plans or pay-as-you-go — we match the plan to how your business actually uses the phone.
Everything Your Business Needs to Communicate
We build your communication system around how your team actually works. Whether you need desk phones, video conferencing, mobile access, or all three — we design, deploy, and manage the whole thing.
Your Phone System, Built Into Teams
Microsoft Teams Phone turns the collaboration tool your team already uses into a full business phone system. Make and receive calls from your desk, laptop, or mobile — using your business number. Features include call queuing, voicemail, auto-attendant, call forwarding, and call recording. It integrates natively with Outlook, SharePoint, and the rest of Microsoft 365, so your communications and productivity tools work as one.
Flexible Call Plans That Fit Your Usage
We provide SIP trunking with your choice of unlimited call plans (local, national, and mobile) or pay-as-you-go options — so you only pay for what you use. We handle number porting, configuration, and ongoing management. Whether you're a team of five making a handful of calls a day or a busy office with phones ringing constantly, we match the plan to your business.
A Proven Platform for Businesses That Need More
For businesses that need a full-featured PBX with advanced call routing, queuing, and contact centre capabilities, we deploy and manage 3CX. It can run on-premise or in the cloud, giving you flexibility without complexity. 3CX includes integrated voice, video, messaging, and live chat — plus mobile apps so your team stays connected from anywhere.
Professional Desk Phones, Fully Integrated
The Yealink MP54 is a premium Teams-certified desk phone with a colour touchscreen, HD audio, and a design built for modern offices. We configure and deploy every handset so it's ready to use out of the box — paired with your Teams or 3CX system, logged in to the right user, and connected to your network.
Boardroom Conferencing, Done Properly
Transform your meeting rooms with Yealink MeetingBoard — a large-format interactive display with built-in camera, microphone, and wireless content sharing. Combined with a touch control panel, expansion microphones, and PTZ cameras, it delivers a professional, high-quality video conferencing experience. We design, install, and manage the entire room setup so your team can walk in and start a meeting with one tap.
Video Meetings That Actually Work
Whether it's a quick one-on-one or a company-wide meeting with 250 participants, we set up video conferencing that's reliable and simple. Screen sharing, meeting recording, breakout rooms, and live captions are all included with Microsoft Teams. We configure everything so your team can join meetings from any device — desktop, laptop, tablet, or phone — without IT support.
Why Your Phone System Should Be Part of Your IT
Separate phone provider
When calls drop, you call one company. When the network goes down, you call another. They blame each other.
One team manages your phones, your network, and your IT. When something goes wrong, we fix it — no finger-pointing.
Separate phone provider
Your phone system doesn't talk to your email, calendar, or collaboration tools.
Your phone system is built into Microsoft Teams — so calls, meetings, chat, and files all live in one place.
Separate phone provider
You manage a separate contract, a separate bill, and a separate support number.
Your phone system is included in your IT plan. One relationship, one invoice, one team to call.
What Outdated Communication Costs You
32 min
Average time employees waste per day on communication tool issues (industry research)
25%
Cost reduction achieved by businesses migrating from legacy PBX to cloud-based phone systems
70%
Of businesses say poor communication tools directly impact customer satisfaction
An unreliable phone system doesn't just frustrate your team — it frustrates your clients. Missed calls, dropped conferences, and communication breakdowns erode trust and cost you business. Modern cloud-based systems eliminate these problems while reducing your overall costs.
What Communication Looks Like When It's Sorted
Your team calls from anywhere
Office, home, or on the road — one business number, any device. Clients always reach the right person, and your team never misses a call.
Meetings just work
No more "can you hear me?" or frozen screens. Video conferencing is reliable, high-quality, and simple to join from any device with one click.
Your boardroom impresses
Walk-in-ready meeting rooms with professional video and audio that make your business look as good as it is.
One bill, one team
No more juggling phone providers, internet providers, and IT providers. Everything is managed together, by people who already know your business.
Related insights
Questions we are asked about this regularly, answered in plain English with no obligation attached.
- 2 min
How should a not-for-profit handle its phone system?
Virtualise it. Legacy phone systems linger longest in this sector and consolidating usually reduces the bill while improving the service.
Read the article - 2 min
Should a multi-branch transport business consolidate its phone systems?
Usually yes, and it is one of the few IT projects that reduces a recurring bill. Chess Moving cut telco costs 25% across seven branches.
Read the article - 5 min
What happens to your phones when the internet goes down?
Nothing good, unless it was designed for. Failover, mobile apps and a diverted number are the three answers, and they need setting up first.
Read the article - 5 min
What does a business phone system cost in Australia?
Four separate components, quoted as one number and rarely compared properly. What you are actually buying, and where quotes hide the difference.
Read the article - 2 min
Is it legal to record business calls in Australia?
It depends on your state and on consent. Announce it, get advice for your jurisdiction, and decide retention before switching it on.
Read the article - 5 min
Teams Phone Standard or Teams Phone with Calling Plan: what is the difference?
One is the phone system alone, the other bundles Microsoft's own call carriage. Most Australian businesses are better off bringing their own carrier.
Read the article
More questions we are asked about this
Related solutions
These services work hand in hand with what you just read — all delivered by the same Adelaide team.
- Managed
Microsoft Teams & SharePoint
Unified collaboration: chat, voice, video, file co-authoring and structured intranet content.
Learn more - Managed
Microsoft 365
Productivity, collaboration and security in one all-in-one Microsoft 365 Business Premium solution.
Learn more - Managed
IT Support & Management
Adelaide-based service desk acting as your single point of contact for every IT request.
Learn more
Frequently asked questions
Let's upgrade your business communication.
Book a free 30-minute consultation. We'll review your current phone system, understand how your team communicates, and show you what a modern, fully managed solution looks like — no obligation.
- 30-minute discovery — no jargon, no pressure
- Plain-English Essential Eight Cyber Security Scorecard
- A clear plan tailored to your business