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Summit Internet
Replace your old phone system

That Box on the Wall Has Had a Good Run. Here Is How to Retire It.

Whatever name is on it, an on-premise phone system is a box you maintain, patch, program and pay to keep alive. Summit moves your business to a cloud phone system with new handsets, your numbers ported free, and a free assessment first.

Book My Free Assessment Call 1300 049 749

Free for businesses moving off an old phone system

Free site assessment and free local number porting

Step 1 of 2: your details
Which phone system do you have? *

Offer: a free assessment of your current phone system, and free porting of local (geographic) numbers when you move to a Summit voice plan. 1300, 1800 and 13 numbers are excluded. $0 upfront hardware is included on our MAX plans. Available until 31 December 2027 unless extended. Terms apply.

Would rather talk? Call 1300 049 749

Overview

Most businesses do not choose to replace their phone system. They keep it until something forces the issue: a fault nobody can fix, a move to new premises, a staff member who is the only person who knows how to program it, or the supplier telling them the support has run out.

You can choose the moment instead. This page sets out what has changed in Australia, what your realistic options are, and what a move involves, so you can decide on your own timetable rather than the system's.

Here is what is on the record.

  • ISDN is already gone. Telstra's final ISDN exit date was 31 May 2022 in nbn fixed-line areas and 30 November 2022 in satellite and wireless areas, with approved extensions to 31 May 2023. A system built around ISDN cards now needs a different way to reach the phone network, usually SIP.
  • Telstra has exited PABX hardware and maintenance. Its exit of PABX hardware supply, TBS Care and Managed Voice Services took effect on 30 September 2026, and named Alcatel-Lucent, Avaya, Ericsson LG, Fujitsu, Mitel, Aastra, ShoreTel, NEC and Panasonic among the brands. If Telstra looked after your system, that fault service has ended, and Telstra's advice is to sign up with a PABX maintenance provider or the vendor.
  • The copper network is being upgraded. nbn has announced a targeted upgrade of copper-based connections to fibre, with notifications from July 2027 and the first service suspensions not expected before January 2028. If your site is on a copper-based nbn service, it is worth asking what that means for the lines your phones use.
  • nbn's analogue voice port is on its way out. On fibre, nbn closed new orders for its analogue voice port (UNI-V) on 26 May 2024 and is withdrawing it on 31 January 2031.

None of this means your phones stop working tomorrow, and we will not tell you they do. It does mean the world your old system was built for has largely gone, and that choosing your moment is better than having it chosen for you.

Summit Internet is an independent Australian carrier (ACMA Carrier Licence #388) serving businesses since 2000. We are not affiliated with any brand named on this site. Brand and model names are trademarks of their respective owners and appear only to identify what you have.

Find Your System

Pick the brand on your box. Each page has the facts we can verify for that system, an honest comparison, and a free assessment.

Brand Models we see most
Avaya IP Office, Aura, Partner
Cisco Unified Communications Manager, Business Edition, CME, UC500
Mitel MiVoice Office 250, MiVoice Business, 5000, MX-ONE
ShoreTel ShoreTel Connect, MiVoice Connect, ShoreGear
Siemens HiPath, OpenScape Business, OpenScape Office
Panasonic KX-TDA, KX-TDE, KX-NCP, KX-NS
NEC SV8100, SV9100, Topaz, Xen
Samsung OfficeServ 7030, 7100, 7200, 7400
Alcatel-Lucent OmniPCX Office, OXO Connect, OmniPCX Enterprise
LG and iPECS LG Aria, iPECS LIK, eMG, UCP

Signs It Is Time

You do not need a vendor notice to know a phone system has done its job. These are the signs we hear about most:

Only One Person Can Change It

Adding a staff member, changing the after-hours greeting or rerouting calls for a public holiday needs one specific person or an installer visit, and a bill.

Staff Cannot Take Calls Away From Their Desk

Half the team works from home or on site, and the main number rings an empty office.

You Cannot Easily Get Parts or Handsets

Handsets are failing or going missing, and replacements are second-hand or hard to source.

It Still Depends on Lines That Are Gone

Your system was built around ISDN or analogue lines, and it now relies on converters and workarounds to reach the phone network.

Nobody Is Looking After It

The maintenance contract lapsed, the installer retired, or the fault service you relied on has ended.

Your Four Options

There is no single right answer, and we will tell you honestly which one fits.

Option What it is Best when
Keep the system, move the lines to SIP Your system stays; SIP trunks replace the old phone lines The system is IP-capable, healthy, and you mostly need to replace lines that are going away
Replace the system with Hosted PBX A cloud phone system with new handsets, run by us You want the system off your hands, remote working and one per-user price
Move calling into Microsoft Teams Summit connects Teams to the phone network Your team already lives in Microsoft 365
Do nothing yet Carry on, with eyes open The system is healthy and you have a plan. Even then, a free assessment tells you what to watch
Talk to an expert

Not sure what is on your wall?

Tell us the brand on the box, or send a photo. We will tell you what it is, what it is costing you to keep, and what moving involves, free.

Book my free assessment Call 1300 049 749

Key Benefits

  • A Free Assessment, Not a Sales Pitch

    We look at what you have, how many users and lines, which numbers matter, and what is plugged into it. You get a straight answer, including "not yet" when that is right.

  • Free Local Number Porting

    When you move to a Summit voice plan, we port the local (geographic) numbers on your service at no charge. 1300, 1800 and 13 numbers are excluded from the offer and can still be ported. Available until 31 December 2027. Terms apply.

  • New Handsets, $0 Upfront Hardware on MAX Plans

    Desk phones, cordless handsets and reception consoles arrive preconfigured. $0 upfront hardware is included on our MAX plans, so replacing a system does not mean a capital outlay.

  • Everything Included, From $10 per User per Month

    Hosted PBX with auto attendant, ring groups, call queues, voicemail to email, time-of-day routing, call recording and mobile and desktop apps. One per-user price, no feature packs.

  • Phones That Follow Your People

    Make and take calls on your business number from a mobile or laptop. The ABS reports that 36% of employed Australians usually work from home, up from 32.1% in 2019.

  • Nothing to Patch or Babysit

    No controller in a cupboard, no software release to track, no specialist on call. Changes happen in a web portal.

How It Works

  1. 1 Book your free assessment

    Fill in the form above or call 1300 049 749. Tell us the brand and model, or send a photo of the box or a handset.

  2. 2 We map what you have

    A Summit specialist lists your users, lines, numbers and everything connected to the system, such as EFTPOS, alarms, fax, intercoms and paging.

  3. 3 Choose your handsets

    Desk phones, cordless handsets, a reception console, softphone only, or a mix.

  4. 4 We preconfigure and ship

    Your handsets arrive with extensions, greetings and ring groups already set up.

  5. 5 We port your numbers and cut over

    On a day you choose, we port your numbers, test inbound and outbound calls and check every connected device. Port first, cancel after: a disconnected number can no longer be ported.

Why Choose Summit

  • 01

    We Are a Carrier

    Summit holds its own ACMA Carrier Licence (#388) and has served Australian businesses since 2000. Your calls, numbers and internet come from the company that runs them.

  • 02

    One Team for the Whole Move

    Phones, numbers, internet and backup are planned together by one team.

  • 03

    Straight Answers

    If staying put a while longer is the right call, we will say so.

  • 04

    Your Numbers Stay Yours

    Local numbers ported free and tested before you cancel anything.

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Why Australian Businesses Choose Summit Internet

  • Great business and service provider. Highly recommended.

    Nabil Salameh

    last month

  • The Summit Team have always been a pleasure to work with; we highly recommend their services. Thank you for the continued support.

    Paul Braithwaite

    5 months ago

  • We recently moved our dental practice over to Summit for phone services, and the experience has been excellent from start to finish. The team has been responsive, professional, and incredibly helpful throughout the entire setup process. The transition was smooth, any issues were addressed promptly, and communication was always clear and efficient. Reliable phones and internet are essential for a busy practice like ours, and Summit has delivered exactly that. A special thank you to Michael for his patience and ongoing assistance during the transition. Highly recommend Summit to any business looking for reliable service and great customer support.Read more

    Elli Darabi

    5 months ago

  • The best service !!! Got issue fixed out by Greg ^^

    白大倫

    5 months ago

  • The whole team at Summit have been great from the initial onboarding to the rapid responses from Max when we need to make changes or additions to our services. Can't recommend them enough!

    Aaron Klaver

    5 months ago

  • As the I.T. Manager for Hydronic Systems Australia, Summit helps provide me and our companies with consistently stable Business Grade Internet, backed up by a dedicated Fixed Wireless Broadband connection. They also saved us a serious amount of money on our mobile phone bills. We have had no serious issues, and our business has been rock-solid under there great service. Highly Recommended.Read more

    James Paterson

    6 months ago

  • Prompt and efficient service. Highly recommend

    Elliot Bell

    6 months ago

  • We now use Summit across our real estate network. Great family business, reliable and their attention to detail is outstanding. Highly recommend.

    Ryan Bell

    6 months ago

  • As a reseller, we primarily work with Summit’s 4G services and have been very impressed. The plans are affordable, flexible, and well suited to our customers—especially for internet failover solutions. The sales and support teams are responsive and genuinely helpful, which is why we’re proud to partner with Summit Internet. We happily recommend them.Read more

    Mal Skinner

    6 months ago

  • After working with another ISP for several months to deliver a critical internet service for a major international sporting event, we were ultimately advised that the required upgrade was unlikely to be completed prior to event week. This left us facing a significant risk to service delivery. After exhausting all other options (and a few sleepless nights) we came across Summit Internet. From the initial conversation, Allan immediately understood the severity of the situation and quickly engaged his technical delivery team. Michael “Radar” was on site within days to assess and finalise a solution. Despite challenging conditions, including large trees and other obstructions, he worked tirelessly to design and implement an alternative approach. Leveraging an adjacent building, a temporary NBN connection, and a wireless link into the comms room, the solution was delivered within 24 hours of the initial site visit. Not only was the outcome faster than expected, but it was also more cost effective and delivered higher speeds than originally promised by the previous ISP. Over the course of the event, the service handled terabytes of data and supported hundreds of concurrent users without a single speed or performance issue. I cannot thank Summit Internet, particularly Allan and Radar enough for their exceptional service, technical expertise, and commitment to delivering under pressure. Highly recommended.Read more

    Adam Hastie

    6 months ago

  • Fausto and the staff at Summit are amazing. We have had nothing but fantastic service from start up to problem solving issues. The system is easy to use. Would highly recommend this service provider.

    Jo Bodhankar

    6 months ago

  • Summit internet recently set my small business up with a local land line number and a soft phone that runs off an app on my mobile - getting my personal phone number off the internet and being able to distinguish between business and personal calls is a game changer. Whole process took less than a week, and is super cost effective. Highly recommend.Read more

    Alex Holly

    8 months ago

Reviews from Google. Read all reviews on Google

Frequently asked questions

Will my phones stop working if I do nothing?
Not necessarily, and we will not tell you they will. The risk is that ISDN has already gone, Telstra's PABX maintenance has exited, and support for individual systems varies by brand and release. The brand pages set out what we can verify for each.
Which phone systems do you replace?
Any of them. The pages above cover the brands we see most, including Avaya, Cisco, Mitel, NEC, Panasonic, Samsung, Alcatel-Lucent, Siemens, LG iPECS and ShoreTel. If yours is not listed, send us a photo and we will identify it.
Will I keep my phone numbers?
Yes. We port your numbers to Summit and test before you cancel anything with your old provider. Local numbers are ported free; 1300, 1800 and 13 numbers can be ported too, outside the free offer. A simple port typically takes a couple of weeks and complex ports take longer, so we start early.
Can I keep my old handsets?
We supply new handsets, preconfigured, so there is nothing to program. $0 upfront hardware is included on our MAX plans.
What does it cost?
Summit Hosted PBX starts from $10 per user per month with every feature included. Your assessment gives you an exact figure, including handsets and internet if you want them.
What about EFTPOS, alarms, fax and intercoms?
We check every connected device during the assessment and agree a working path for each before cutover.
What if the internet goes down?
A cloud phone system needs an internet connection, which is why we recommend business nbn with automatic 4G backup. Staff can also take calls on the mobile app over mobile data.
Get started

Find Out What Your Old Phone System Is Really Costing You.

Talk to someone who can actually action it, not read you a list of plans. Tell us how your business runs and we will tell you what suits it.

Call 1300 049 749 · Mon-Fri 9AM-5PM AEST

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