This guide covers the real cost of Telstra Business phone services for small businesses, why so many businesses are looking elsewhere, and what the alternatives actually look like in 2026. Need to Know Comms is an independent Australian publishing project with direct experience in business communications infrastructure across NBN connection types and cloud phone deployments. By the end of this page you'll understand what you're paying for, what you could have instead, and how to make the switch without losing your phone numbers. You're not behind for asking these questions. The industry made this unnecessarily complicated on purpose.
Why Businesses Are Leaving Telstra
The most common complaints we hear from small business owners considering a switch away from Telstra aren't about call quality or coverage. They're about everything around the service.
Price and bundling complexity. Telstra Business phone pricing is structured around bundled packages. On the surface, the bundle looks like good value. But when you break out exactly what you're paying for, many small businesses find they're paying for features they don't use, call volumes they don't make, and hardware they didn't really need.
Product discontinuations. Telstra has steadily retired its small business phone products over recent years. Telstra progressively disconnected legacy copper services in NBN fixed-line areas, but copper-based telephone services still operate outside the NBN fixed-line footprint. ISDN services are gone. Products that small businesses relied on for years have been wound up, often with limited notice, leaving owners scrambling to find something new.
Being pushed toward enterprise solutions. Adaptive Collaboration is Telstra's unified-communications suite comprising Telstra Cloud Calling and Microsoft Operator Connect, and it is offered to small businesses as well as larger organisations. For a 3-person trade business or a small medical practice, the feature set is overkill and the configuration complexity is a genuine burden.
Support experience. Telstra says the great majority of consumer and small-business calls are answered in Australia, although some escalated-fault and online-chat support remains offshore. This isn't unique to Telstra, it's an industry-wide problem with large carriers. But for a business owner who just wants their phones to work, it's a significant frustration.
Lock-in. Contract terms vary by product: Adaptive Collaboration plans advertise no lock-in, and Ultimate Business Voice did before it closed to new sales on 30 September 2025, while some legacy, enterprise and equipment arrangements can involve fixed terms or remaining hardware charges. Businesses that want to switch find themselves either waiting out a contract or paying to leave. For a comparison of current options, see our guide to the best phone systems for small business in Australia.
Legacy copper services have largely been disconnected in NBN fixed-line areas, but Australia's copper landline network has not been switched off nationwide. Many current business landline services are delivered as IP voice over an NBN or other broadband connection, but some copper-based services remain outside the NBN fixed-line footprint. The question isn't whether to move to VOIP. You're already on it. The question is whether you're on the right VOIP service.
What Telstra Business Phone Actually Costs
Let's break down the actual cost of a Telstra Business phone service for a small business with 3-5 staff. Prices are AUD including GST.
Line rental. Telstra's published business-voice pricing varies substantially by product. For a business connecting today, the two you can actually buy are Adaptive Collaboration Basic Calling at $19.80 per month per line and BusinessLine Part at $55 per month per line. If you need two lines to handle simultaneous calls, that is roughly $40 to $110 per month in line rental alone before any calls are made, depending which product you land on. Ultimate Business Voice, at $50 per month per line, has been closed to new sales since 30 September 2025 and applies only to services already connected, so it cannot form part of a new quote. Figures are per Telstra's Critical Information Summaries as at 4 September 2026; the CIS is the authoritative document and is what you should check against your own quote.
Call packs. Telstra offers call plans that bundle national and mobile call minutes. Call inclusions depend on the product. Adaptive Collaboration plans, and Ultimate Business Voice services still connected, include standard Australian calls, while optional add-ons such as international calling may cost extra. If your call volume is low, you may be paying for minutes you never use. If your volume is higher, you may find yourself on a more expensive tier.
Hardware. Handset costs vary by the specific Telstra product, device and purchase or lease arrangement; use the current device price list or an itemised quote. Whether a handset can be reused depends on the exact model, ownership or lease terms, provisioning restrictions and compatibility with the receiving provider.
Total monthly cost at entry level. The monthly total depends on the named Telstra product, number of lines, calling inclusions, add-ons and hardware; compare against a current itemised Telstra quote or bill. Some businesses are paying significantly more once you add optional features like call management, voicemail, or additional lines.
What this adds up to annually. At $150/month, that's $1,800 per year for a phone system that, for many small businesses, is delivering basic inbound and outbound calling and nothing more.
Want to see how your current spend compares? Use the VoIP Cost Calculator to estimate what a modern cloud phone system would cost for your team size and call volume.
What You're Actually Paying For vs What You Need
Here's a framework for assessing what your current phone spend is actually buying you.
What you're likely paying for: Line rental (access to the phone network), a call plan (minutes for outbound calls), possibly a handset repayment, and potentially a monthly fee for features like voicemail.
What most small businesses actually need: The ability to receive and make calls simultaneously across a small team, a basic voicemail, the option to route calls after hours, and a professional experience for customers calling in.
What most small businesses don't need but may be paying for: Enterprise-grade unified communications platforms, extensive Microsoft Teams integration for teams that already use a simple chat tool, large call allowances for businesses that mostly receive calls, or hardware locked to a carrier network.
The honest question to ask is: if you could rebuild your phone system from scratch today, with the knowledge of exactly what your business actually uses, what would you choose? For most small businesses with 1-10 staff handling a moderate call volume, the answer is not a Telstra enterprise bundle. It's a focused, cloud-based phone system with a flat monthly cost and no long-term lock-in.
The Alternatives: Cloud Phone Systems Explained Simply
A common alternative to traditional business phone lines is a cloud phone system using Voice over Internet Protocol, also called a cloud PBX. This is not a new or experimental technology. It has been the default for growing Australian small businesses for several years.
How it works in plain English. Your phone calls travel over your internet connection rather than a dedicated phone line. Your phone system, the thing that manages call routing, voicemail, hold music, and extensions, is hosted by a specialist provider on their servers ("in the cloud"), rather than a box bolted to the wall in your office.
What this means for your business. You don't need a separate phone line from Telstra or your ISP. Your desk phones plug into your office network (the same network your computers use) and register with your chosen cloud phone provider. Staff working from home or on the road can answer business calls on their mobile or laptop using an app. All of this is managed through a web-based admin portal.
Features that come standard. Feature inclusions vary by provider and plan; check whether call forwarding, voicemail-to-email, hold music, extensions, auto-attendant, ring groups and reporting are included or charged as add-ons.
For more detail on how cloud phone systems compare to traditional options, see our guide: VoIP vs Traditional Phone Systems Australia.
What to Look For in a Replacement
Not all cloud phone providers are the same. Here is what matters for a small Australian business.
Australian-owned and operated. When something goes wrong (and occasionally it will), you want to speak to an Australian support team who understand how NBN works, how number porting works in Australia, and what Australian Consumer Law requires from a telco. Offshore support desks reading from a script cannot help you with a porting delay involving an Australian carrier.
Australian-based support. Look for a provider where you can reach a real person in Australia by phone during business hours. Check reviews. Ask the question directly before signing up.
Month-to-month contracts. There is no reason to lock into a long-term contract for a cloud phone service. The technology is mature, competition is real, and month-to-month billing protects you. If a provider won't offer month-to-month, that is a red flag.
Number porting included. Switching providers should not mean losing your existing phone number. Number porting is the process of transferring your existing number to a new provider, and it is your legal right under ACMA regulations. Any serious Australian business phone company will handle number porting as a standard part of onboarding. Check the process and timeframes upfront. See our full guide: Number Porting Australia: How It Works.
Right-sized feature set. A 4-person office doesn't need a contact centre platform. Look for a provider who offers a plan that matches what your business actually does, with a clear path to add features as you grow, without forcing you to buy them all upfront.
NBN-aware provisioning. Your cloud phone quality depends on your internet connection. A good provider will ask about your NBN connection type, advise on bandwidth requirements, and help you configure Quality of Service (QoS) settings on your router to prioritise voice traffic. If a provider just sends you a handset in the mail and says "good luck", keep looking.
Not sure how many lines or features your business actually needs? The Phone System Sizing Wizard takes 2 minutes and gives you a clear recommendation.
Open the Sizing WizardHow to Switch Without Losing Your Numbers
This is the most common fear holding businesses back from switching: "What if I lose my number?" Number porting is well-established in Australia, and customers generally hold rights of use that allow an active portable number to be transferred to another provider. Here is how it works.
Step 1: Confirm your current number is portable. Almost all standard Australian geographic numbers (02, 03, 07, 08 prefixes) are portable. 1300 and 1800 numbers can also be ported but the process is different. Confirm with both your current provider and your intended new provider before starting.
Step 2: Don't cancel your existing service. This is the most important instruction and the most commonly ignored one. You must keep your existing Telstra service active until the port is complete. Cancelling early, even if you've arranged the port, can result in the number being released and lost permanently.
Step 3: Start the port with your new provider. Your new cloud phone provider will initiate the porting request on your behalf. You'll need to provide your account details from your current provider (account number, address, and the number to be ported). The new provider submits the port request to the carriers. An individual geographic-number port generally takes 8 to 15 business days; a complex port may take up to 30 business days. End-to-end timing for 1300 and 1800 transfers varies by provider, validation requirements and routing arrangements; confirm the expected timeframe with the gaining provider.
Step 4: Maintain business continuity during the port. Your existing service continues to work during the porting process. Calls will only redirect to your new service when the port completes. Coordinate with your new provider to ensure your new system is fully configured and tested before the cutover happens.
Step 5: Cancel your old service. After the new provider confirms the port is complete, check with Telstra what services remain active and how cancellation would affect any bundled internet, additional numbers, hardware or other services before cancelling anything. For more detail, see: How to Migrate from a Landline to VoIP in Australia.
What Does a Modern Cloud Phone System Actually Cost?
Cloud phone pricing for Australian small businesses is typically structured per seat (per user) per month, with a separate call plan or included call allowance. Prices are AUD including GST.
Entry-level plans for a single user or small office typically start at $20-$35 per seat per month (as at August 2026). This usually includes local and national calls, a direct inward dialling (DID) number, voicemail, and access to the cloud PBX features.
Mid-range plans that include unlimited local and national calls, plus mobile calls, are typically $35-$60 per seat per month.
Hardware is separate from the service plan. A good-quality entry-level SIP desk phone costs $90-$180 AUD (Yealink T31P or equivalent). Configuration assistance and charges vary by provider and plan; confirm whether handset provisioning and setup support are included. If staff are happy to use their mobile or computer for calls (via a softphone app), hardware cost drops to zero.
The real comparison. A 5-seat business paying $200/month to Telstra for basic phone service could move to a cloud phone system, get a substantially better feature set, and pay $175-$250/month, similar or lower cost, with month-to-month contracts and local AU support. The advantage isn't always price. It's what you get for the same money.
Use the VoIP Cost Calculator to model the numbers for your specific team size and call volume.
What Most Businesses Get Wrong
Mistake 1: Cancelling your old service before the port is done. This is the most expensive mistake in business phone switching. If you cancel your Telstra service and the number hasn't ported yet, you can lose the number permanently. Always keep the old service running until the new one is confirmed live.
Mistake 2: Starting with the handset instead of the service. A common pattern is to buy a SIP desk phone (Yealink, Grandstream) and then try to figure out what service to connect it to. This is backwards. Choose your cloud phone provider first, confirm compatibility, then choose handsets based on the provider's recommendation. The provider will often have preferred hardware they can pre-configure for you.
Mistake 3: Choosing based on the lowest headline price without reading the fine print. Some providers advertise low per-seat prices and then add charges for features (call recording, ring groups, IVR, additional DIDs) that more established providers include as standard. Get a full itemised quote for exactly the features you need before committing. Ask specifically: what isn't included?
Mistake 4: Assuming the switch is technically complex. For a small business, switching to a cloud phone system is not a major IT project. It's closer to setting up a new email service. A good provider will handle the porting, pre-configure the hardware, and walk you through setup in a single appointment. You don't need an IT manager or an MSP to manage a 5-seat cloud phone system.
Your Next Steps
If you're considering moving away from Telstra for your business phone, here's a simple checklist to work through before you make any decisions.
- Write down exactly what you currently pay. Pull your last 3 months of Telstra bills. What is the total monthly spend? What does each line item cover?
- List what you actually use. Do you actually use conference calling? International calls? The specific feature you're paying extra for? Separate the used features from the ones you're paying for but have never touched.
- Check how many simultaneous calls you handle. If two staff can be on the phone at the same time, you need at least 2 lines/channels. Use the Phone System Sizing Wizard to work this out properly.
- Confirm your internet connection can support VOIP. Required bandwidth varies by provider and codec; many business voice calls use roughly 60-100Kbps in each direction, with additional capacity needed for concurrent calls and other network traffic. Use the VoIP Bandwidth Calculator to assess your connection.
- Find your current account number and any contract end date. You'll need the account number for porting. Know when any lock-in period ends.
- Get a recommendation. Talk to a specialist who can match your actual call patterns and team size to the right plan. This is faster than trying to evaluate every provider yourself.
Get a tailored recommendation for your business. Tell us about your team and call patterns and we'll match you to the right phone system, no lock-in, AU-based support.
Get a RecommendationWhen switching away from Telstra Business Phone, keeping your existing number is usually the first priority. Our Number Porting Checker confirms whether your Telstra number can be ported, which porting category applies, and what to expect from the timeline.
Businesses on Telstra DOT specifically, the bundled broadband and hosted voice product, have their own retirement deadline to manage: stop-sell passed September 2025, full shutdown is 30 August 2027. Our guide covers Telstra DOT in detail, what it is, what has always been wrong with it, and the exact steps to migrate without losing your phone numbers.
A key concern when leaving a Telstra service is keeping your existing business number. The porting process and timeframe depend on the existing service, number arrangement and porting category, not simply on whether the losing provider is Telstra or another VOIP carrier. Our guide on how to keep your phone number when switching to VOIP covers the Telstra-specific porting process, typical timelines, and how to avoid delays that leave you without a working number during the transition.
Can I keep my Telstra phone number if I switch providers?
Yes. Number porting is your legal right under ACMA regulations. Your geographic number (02, 03, 07, 08 prefix) can be transferred to a new provider. The critical rule: keep your Telstra service active until the port is confirmed complete. Do not cancel first. An individual geographic-number port generally takes 8 to 15 business days; a complex port may take up to 30 business days. 1300 and 1800 numbers follow a different process; as a practical estimate, allow several business days to two weeks for a straightforward transfer and 3 to 4 weeks for complex routing arrangements. See our full guide on number porting in Australia.
Do I need an NBN connection to use a cloud phone system?
You need a broadband internet connection, which for most Australian businesses means NBN. The connection doesn't need to be fast, but it does need to be stable with low jitter and packet loss. As a rough guide, each simultaneous phone call requires approximately 100Kbps of upload bandwidth. A standard NBN 50 connection (typical for small offices) can comfortably support 5-10 simultaneous calls, well above what most small businesses need. The bigger concern is jitter and packet loss, not raw speed. See our guide on VoIP call quality on NBN for more detail.
How long does it take to switch from Telstra to a cloud phone system?
The actual setup of a cloud phone system can happen in a single day. The limiting factor is number porting: an individual local-number port generally takes 8 to 15 business days, while a complex port may take up to 30 business days. End-to-end switching time varies with the port category, provider processing, hardware delivery, configuration and any rejected requests. The existing service should remain active before cutover, but a brief interruption can occur during port activation; coordinate and test the cutover with the gaining provider.
Do I need new desk phones, or can staff use their mobiles?
Both options work with a modern cloud phone system. Most providers offer a mobile app (softphone) that lets staff make and receive calls on their mobile under the business number, no desk phone required. This is popular for businesses with staff who move around, work from home, or don't sit at a desk all day. Desk phones are still preferred for reception roles or high-call-volume positions where a physical handset is more practical. You can mix both, some staff on desk phones, others on the mobile app, on the same system.
What happens to my phone if the internet goes down?
This is a real and important question. Cloud phone systems depend on your internet connection. If the NBN goes down, calls will not connect to desk phones or desktop softphones. Depending on the provider and configuration, incoming calls may be routed to voicemail, a mobile number or another destination during an internet outage; confirm and test the failover behaviour before relying on it. This means customers still reach someone, just on your mobile instead of your office phone. Some providers also offer a 4G SIM backup option for business-grade internet connections. See our guide on the PSTN shutdown and what it means for business continuity.
Is a cloud phone system reliable enough for a business that depends on incoming calls?
Yes, for the vast majority of Australian small businesses. Modern cloud phone platforms run on carrier-grade infrastructure with high availability guarantees (often 99.9%+ uptime SLAs). Reliability depends on the provider platform as well as the internet connection, office network, power, devices, configuration and any dependent services. A stable NBN connection supports reliable calling, but platform, power, local-network, device and configuration failures can still interrupt service. If your internet has reliability issues, fix the internet first, or consider a business-grade connection with a backup option. Cloud platforms can provide redundant infrastructure, while on-premise PBXs can be affected by local hardware failures; actual reliability depends on each system's design, maintenance and continuity arrangements.
What is Telstra Adaptive Collaboration and do I need it?
Adaptive Collaboration is Telstra's unified-communications suite offering Telstra Cloud Calling and Microsoft Operator Connect as separate service options. It integrates calling capability directly into Microsoft Teams, so staff can make and receive business calls within the Teams interface. It's a legitimate product for larger organisations with existing Microsoft 365 deployments and IT infrastructure teams to manage it. For a small business with 2-10 staff, it is almost certainly overkill. The setup complexity, licensing cost, and IT management overhead are not justified by the use case. A purpose-built cloud phone system from a specialist provider will be simpler, cheaper, and faster to deploy for most small businesses.