The Caznet Blog

Practical advice on business internet, phone systems and networks — from Adelaide's own telco team.

Latest articles

Real-world advice from the team that installs and supports business phone systems, internet connections and data centre infrastructure across Adelaide.

Phones

What happens to your phone system if your office internet goes down?

3 March 2026

An all-IP phone system relies on internet — but that doesn't mean calls stop when the connection drops. Here's how well-designed cloud phone systems handle outages.

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Phones

Microsoft Teams is already in your office — here's why it should replace your phone system too

15 February 2026

Most Adelaide businesses already pay for Microsoft Teams through their Microsoft 365 subscription. Adding voice calling turns it into a complete phone system — and eliminates the need for separate hardware.

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Security

Your connection is part of your security posture — how to protect business data in transit

28 January 2026

Firewalls protect what's stored. But how your business connects to its systems matters just as much. Here's what every Adelaide business should know about data security in transit.

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Phones

What happens to your existing phone numbers when you move to Microsoft Teams Calling?

19 January 2026

Moving to Microsoft Teams Calling doesn't mean losing your business phone numbers. Here's exactly how number porting works, what timelines to expect, and how to avoid disruption.

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Internet

When does your business outgrow standard NBN? The signs you need Enterprise Ethernet

4 December 2025

Standard NBN works well for small teams — but as staff numbers, cloud workloads, and VoIP usage grow, the cracks start to show. Here's how to know when it's time to step up.

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Technical

Direct Routing vs Microsoft Calling Plans — which is the right choice for your Adelaide business?

6 November 2025

There are two ways to add phone calls to Microsoft Teams. For most Australian businesses, Direct Routing through a local carrier is the better fit — here's why.

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Internet

What is NBN Enterprise Ethernet, and how is it different from standard business NBN?

28 October 2025

NBN Enterprise Ethernet isn't just a faster NBN plan — it's a fundamentally different product with dedicated bandwidth, symmetrical speeds, and a contractual repair time SLA.

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Internet

What's the difference between business and residential NBN?

22 October 2025

Most businesses are on residential-grade NBN without realising it. The cost difference is small — but what you give up in SLAs, upload speed, and support quality isn't.

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Technical

Why your office Wi-Fi might be letting down a perfectly good NBN connection

8 October 2025

Your NBN plan speed is the ceiling. What your staff actually experience depends on the router, access points, and cabling between the wall and their screens. Here's what to check.

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Data Centre

What to ask before signing a co-location contract — the questions most businesses forget

9 September 2025

Not all co-location facilities are equal. Before you sign, here are the questions that separate a professional data centre from one that will let you down at 2am.

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Internet

The NBN copper switch-off: what it means for your Adelaide business

3 September 2025

Australia's copper network is being progressively decommissioned. If your business still has ADSL, PSTN landlines, or ISDN, the clock is running — here's what you need to do.

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Security

A plain-English guide to the cyber security terms every Adelaide business should know

14 August 2025

Ransomware, phishing, zero-days, EDR — what do these terms actually mean? This guide cuts through the jargon so you can make better decisions about protecting your business.

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Internet

Getting your Adelaide business onto full fibre: what an FTTP upgrade actually involves

11 August 2025

FTTP eliminates the copper segment that holds older NBN connections back. If your premises is eligible for a free upgrade, here's exactly what the process looks like.

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Internet

How to switch your business internet provider without disrupting operations

22 July 2025

Switching internet providers sounds riskier than it is. The process is well-managed and most Adelaide businesses we transfer experience no downtime at all. Here's how it works.

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Internet

SLAs on NBN Enterprise Ethernet — what the repair time guarantees actually mean for your business

16 July 2025

An Enterprise Ethernet SLA is a contractual repair time commitment with credit provisions if missed. Here's what the numbers actually mean for your Adelaide business.

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Internet

NBN connection types explained — FTTP, FTTC, FTTN, HFC, and Fixed Wireless

30 June 2025

The NBN isn't one technology — it's a family of different connection methods, each with different capabilities. Knowing which one serves your premises tells you what you can actually get.

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Data Centre

Co-location vs cloud — how to decide which is right for your workload

12 June 2025

Co-location and cloud aren't competing choices — they serve different workloads. Here's a practical framework for deciding which infrastructure model suits your business.

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Internet

What is an NBN eSLA and is it worth paying for?

29 May 2025

An NBN eSLA adds a contractual repair time guarantee to a standard business NBN service. Here's what it covers, what it costs, and who should actually be paying for it.

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Internet

Download speed, upload speed, and bandwidth — what they mean for your business

14 April 2025

Internet plan speeds are measured in Mbps — but what does that mean for 20 staff on video calls, cloud apps, and VoIP? Here's how to read the numbers that actually matter.

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Data Centre

Why Adelaide businesses are moving their servers out of the comms room and into a data centre

24 March 2025

The office comms room is unreliable, expensive to maintain, and one power event away from disaster. Here's why Adelaide businesses are making the move to professional co-location.

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Internet

4G, 5G and NBN: understanding your business connectivity options

12 March 2025

NBN, 4G, 5G, satellite — each has a role. For most Adelaide businesses, the right answer is NBN as primary with 4G/5G failover. Here's how to think through the options.

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Internet

Do Adelaide businesses actually need gigabit internet?

18 February 2025

1,000 Mbps sounds impressive — but is it what your business actually needs? The answer depends on your team size and workloads more than the headline speed.

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Phones

Renting vs buying your phone system — why cloud PBX makes financial sense for most Adelaide businesses

21 January 2025

Traditional PBX hardware costs tens of thousands upfront and needs replacing every decade. Cloud PBX is a monthly fee with no hardware refresh cycle — here's the full cost comparison.

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Internet

Fibre internet explained — why it's the most reliable connection available for your business

7 January 2025

Fibre optic cables carry data as pulses of light, not electrical signals. Understanding why this matters helps you evaluate your current connection and know when upgrading makes sense.

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Technical

What is 95th percentile billing, and is it right for your business?

17 November 2024

95th percentile billing lets your connection burst freely without penalty, charging you based on sustained usage rather than peaks. Here's how it works and when it makes sense.

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Technical

How many phone lines does your business actually need? A practical guide to sizing your VoIP system

8 August 2024

Buying too many SIP channels wastes money. Too few and calls get busy signals. Here's how to size your VoIP phone system properly — with some simple rules of thumb.

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Phones

Farewell ISDN…

4 February 2021

On 30 September 2019 Telstra began decommissioning ISDN, and in 2020 NBN Co completed the national broadband rollout. Every ISDN-dependent business must now transition to VoIP — here's what that means for you.

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Security

How to protect your VoIP system against toll fraud

29 January 2021

Toll fraud costs Australian businesses millions each year. Poorly secured VoIP systems are a prime target — here are 10 steps to lock yours down.

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Phones

The 5 most used VoIP business phone system features

6 October 2020

When we build a new phone system, we start by mapping out how the business works. Most customers rely on just five core features — here's what they are and why they matter.

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Phones

How much can a VoIP phone system save your business?

24 September 2020

We reviewed our last ten installations and compared the bills before and after switching to VoIP. The average saving was $460 per month — here's the full breakdown.

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Data Centre

Co-location vs on-premises — 6 reasons why data centre wins

5 June 2020

The data centre has traditionally been the realm of big corporates and telcos — but costs have dropped dramatically. Here are six reasons co-location now makes sense for businesses of almost any size.

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Phones

5 key benefits of a cloud hosted VoIP phone system for small businesses

2 June 2020

While email and chat have taken off, the business telephone remains essential. Cloud-hosted VoIP gives small businesses enterprise-grade features at a fraction of the traditional cost.

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Technical

How to turn off SIP ALG on your router and why you should

26 May 2020

SIP ALG is a router feature that's supposed to help VoIP — but in most cases it causes more problems than it solves. Here's how to disable it on the most common routers.

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Data Centre

Our top 6 rules to live by in the data centre

24 April 2020

We've installed equipment across data centres from SMB to enterprise. These are the six lessons we've learned — sometimes the hard way — about doing it right.

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Business

Are you ready to 'work from home'?

7 April 2020

When COVID-19 hit, we transitioned our own team to remote work — and learned a lot in the process. Here are seven things that made the difference.

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Data Centre

What is the difference between a data centre and cloud computing?

12 December 2019

Many businesses use the terms interchangeably, but data centres and cloud computing are fundamentally different things. Understanding the distinction helps you make better infrastructure decisions.

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Talk to our Adelaide team

Questions about internet, phone systems or data centre infrastructure? We're here to help — with no obligation.