Business phone systems
3CX, hosted PBX and VoIP — crystal-clear calls, modern features and lower costs than legacy systems. Phone systems.
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Business phone systems & internet Melbourne
Business phone systems and internet in Melbourne: 3CX, Teams Voice, VoIP, business NBN and fibre to 1Gbps. Static IP on every plan and one local team to call.
Last reviewed October 2026
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Business phone systems
Business phone systems in Melbourne: 3CX, Teams Voice and hosted PBX, set up by security-certified engineers. Keep your numbers and pay a clear price per seat.
Learn moreNBN & corporate internet
Business internet in Melbourne: NBN and corporate fibre up to 1Gbps, static IP on every plan, 4G/5G failover and one local team for IT, phones and internet.
Learn moreSIP trunks / 3CX
3CX phone systems and SIP trunks for Melbourne businesses, set up and secured by Key IT's security-certified engineers. Keep your numbers and cut call costs.
Learn more3CX caller analytics
3CX caller analytics in Melbourne: live Grafana dashboards for call volume, wait times, abandoned calls and team performance. Set up and secured by Key IT.
Learn moreMicrosoft Teams voice
Microsoft Teams Voice in Melbourne: turn Teams into your phone system, keep your numbers and get direct routing set up by security-certified engineers.
Learn moreBusiness phone systems and internet in Melbourne
Key IT designs, installs and supports business phone systems and internet for Melbourne businesses as a single service. Calls run on Microsoft Teams Voice, 3CX or a hosted PBX; data runs on business NBN or corporate fibre up to 1Gbps, with a static IP on every plan. One security-certified team looks after your phones, your connection and the rest of your IT, so a fault means a single call to us.
Phones and internet are not glamorous — until they go down and the business stops. Whether you are retiring an ageing PBX, moving a hybrid team to VoIP or needing a faster link for cloud apps, we design around how your business takes calls and uses data.
What phone and internet services does Key IT provide?
Four connected services from one team: the phone system, the internet it runs on, the SIP lines that link it to the phone network, and Teams calling.
NBN and corporate internet
Business and corporate-grade internet up to 1Gbps, with failover options so connectivity is resilient. Business internet.
SIP trunks and 3CX
Cost-effective lines and a full unified-communications platform, with optional 3CX caller analytics dashboards for call volumes, wait times and missed calls. 3CX & SIP trunks.
Microsoft Teams Voice
Turn Teams into your business phone system, so staff handle calls in the same app they use for Microsoft 365 chat and meetings. Teams Voice.
Which phone system and connection does your business need?
It depends on how your team takes calls and how much of your work runs in the cloud, so we plan the phone system and the connection together.
Microsoft Teams Voice
A good fit when staff already spend the day in Microsoft 365 and mostly make and take direct calls.
3CX
A good fit when callers queue for reception, sales or support, and you want menus, ring groups and call reports.
Business NBN
The usual starting point, with a static IP and business-level support.
Corporate fibre
Up to 1Gbps for offices with heavy video, cloud and data use.
Whichever you choose, your existing numbers move across, and failover options keep calls and cloud apps running if the main link drops.
Why have one provider for phones, internet and IT?
One provider means one team is accountable when calls drop or the internet fails. A bad call could be the handset, the phone system, the internet link or the network in between, and separate suppliers can each blame someone else. With Key IT, one Melbourne team takes responsibility for the whole chain, alongside your IT support services.
FAQ
Frequently asked questions
Is VoIP good enough for business calls?
Yes, on the right connection. VoIP (voice over internet protocol) sends calls as data over your internet link rather than old copper lines, so call quality depends on that link and on how the phone system is set up. Choppy calls usually trace back to one of those, which is why we supply and support both.
Do your internet plans include a static IP?
Yes. Every business internet plan we supply comes with a static IP, the fixed address that VPNs, remote access and offsite camera viewing rely on.
Can you provide both phones and internet?
Yes, and supporting them together means one accountable team rather than separate suppliers blaming each other.
How fast is your business internet?
Business and corporate-grade NBN and fibre up to 1Gbps, depending on your location and needs.
Can staff use the phone system from home?
Yes. Modern systems like 3CX and Teams Voice work from anywhere with an internet connection.
Can scammers use our business phones against us?
Yes, in two ways. Toll fraud is when someone hijacks a poorly secured phone system to run up overseas calls; barring dialling you never use helps stop it. Voice scams impersonate the boss or a supplier to rush a payment; our guide to deepfake voice cloning CEO scams explains the call-back habit that counters them.
Why do our business texts now say ‘Unverified’?
Because the sender name isn't registered on the ACMA's SMS Sender ID Register through the provider that sends it. Since 1 July 2026, telcos must replace any unregistered sender name with ‘Unverified’ and group those texts in one thread with other unregistered senders, including scams. Texts that show a phone number rather than a name aren't affected. Our guide to the SMS Sender ID Register and ‘Unverified’ texts covers who registers, the confirmation step and a checklist for booking-platform reminders.
Who supports the phone system if there is a problem?
Key IT does, with the same engineers who look after your computers, network and Microsoft 365. Call 1300 053 948 or log a ticket on our client support page. We answer weekdays between 8am and 5pm, and for managed clients, a rotating on-call roster handles urgent phone faults after hours.
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