Siemens HiPath or OpenScape in the Comms Cupboard? Check Your Version Before 31 December.
Unify's own wiki says the OpenScape Business V2 mainboard will no longer be supported after 31 December 2026. Summit moves your business to a cloud phone system with new handsets, your numbers ported free, and a free assessment first so you know exactly which version you are running.
Free for businesses moving off an old phone system
Free site assessment and free local number porting
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.
Overview
If the label on your phone system says Siemens, HiPath or OpenScape, there is a good chance it has been in the same cupboard for a long time and nobody has had a reason to open the door. That is a compliment to the hardware. It is also how a system ends up being replaced in a hurry.
Nothing here says your phones stop ringing tomorrow. What follows is only what we can point to a source for.
One hard date, for one product. Unify's own wiki states that the OpenScape Business V2 mainboard will no longer be supported at the end of 31 December 2026, and recommends the V3 mainboard instead. That applies to the V2 mainboard only. We have not found a published end-of-support date for OpenScape Business V3, HiPath 4000, OpenScape Office or Hicom, and we will not make one up. If you have OpenScape Business, ask your maintainer one question: is the board V2 or V3?
The name on the box has changed hands. Siemens Enterprise Communications was formed in 2008 as a joint venture between the Gores Group and Siemens. It was renamed Unify in 2013, and Atos completed its purchase of Unify in January 2016. Mitel confirmed completion of its acquisition of Unify on 2 October 2023, and OpenScape Business is now sold and documented under the Mitel brand. None of that ends support for anything. It does mean that "who looks after my system?" is worth a straight answer from whoever maintains it.
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. OpenScape Business X models offer BRI and PRI trunk cards, so a system still built around ISDN now needs SIP trunks or a gateway to reach the phone network.
Siemens, HiPath, OpenScape, Unify and Mitel are trademarks of their respective owners, used here only to identify the product you have. Summit Internet is not affiliated with Siemens, Unify or Mitel. Summit is an independent Australian carrier (ACMA Carrier Licence #388) that has served businesses since 2000.
For a wider look at your options, see our guide to replacing your old phone system.
Key Benefits
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A Free Assessment Before You Spend a Cent
We start with what you actually have: HiPath or OpenScape, which board and version, how many users, which lines and numbers, and everything plugged into it, such as EFTPOS, alarms, fax, door intercoms and paging. You get an honest summary, including whether staying put a while longer makes sense.
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Free Local Number Porting
Your customers know your number, so we keep it. When you move to a Summit voice plan, we port the local (geographic) numbers on your service at no charge: your main line, direct numbers and fax numbers, such as 02, 03, 07 and 08 numbers. 1300, 1800 and 13 numbers are excluded from the offer, and can still be ported. Available until 31 December 2027. Terms apply.
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New Handsets, With $0 Upfront Hardware on MAX Plans
Your new desk phones, cordless handsets and reception console arrive preconfigured, with extensions, greetings and ring groups already set up. Plug them in. $0 upfront hardware is included on our MAX plans.
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Everything Included in One Per-User Price
Hosted PBX from $10 per user per month. Auto attendant, ring groups, call queues, voicemail to email, time-of-day routing, call recording and mobile and desktop apps are all included. No feature packs, no licence codes.
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Phones That Follow Your People
Make and take calls on your business number from the Summit app on a mobile or laptop, from the office, home or a client site. The ABS reports that 36% of employed Australians usually work from home, up from 32.1% in 2019.
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No Upgrade Treadmill
A cloud phone system has no board to match to a software release and no mainboard swap to schedule. The platform is ours to run. Adding a user or changing a greeting takes a few clicks in a web portal.
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A Cutover Day You Choose
We plan the move for a quiet day, test inbound and outbound calls with you, and check every connected device before we tell you to cancel anything.
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Internet and Backup Handled Properly
Cloud phones are only as good as the connection under them. We can supply business nbn with automatic 4G backup, with voice prioritised across our network.
What You Will Keep, and What You Will Miss Moving From Siemens
We would rather be straight with you. Here is how the day-to-day compares.
| On your Siemens system today | On Summit Hosted PBX |
|---|---|
| Auto attendant and call groups, programmed by an installer | Auto attendant, ring groups and queues you can edit yourself in a web portal |
| Voicemail on the system | Voicemail to email, included |
| System phones tied to the box | Desk phones, cordless handsets or a softphone, anywhere there is internet |
| Software releases and boards to keep current | Nothing to upgrade on your side |
| Calls between desks keep working if the internet drops | Needs internet to work, so we pair it with automatic 4G failover, and staff can take calls on the mobile app |
| Built-in extras such as a Teams connection, DECT integration or a contact-centre option, depending on your board and licences | Hosted PBX or Microsoft Teams Calling instead. If you use one of these extras, tell us and we will check what replaces it |
The honest trade is simple: an on-premise system can keep internal calls working with the internet down, and a cloud phone system depends on a good connection. Moving to OpenScape Business V3 is also not necessarily like for like. Unify's wiki lists features dropped in V3, including myPortal Smart, myPortal for OpenStage, Xpressions Compact, the integrated VPN and XMPP, so if you rely on any of those, ask before you upgrade or move.
How It Works
- 1 Book your free assessment
Book your free assessment
Fill in the form above or call 1300 049 749. Tell us the brand and, if you know it, the model and whether it is V2 or V3. A photo of the box, or of a handset, is enough.
- 2 We look at what you have
We look at what you have
A Summit specialist reviews your system, users, lines and numbers, and everything connected to it. We list every number you want to keep and every device that depends on the phones.
- 3 Choose your handsets, or go softphone only
Choose your handsets, or go softphone only
Pick desk phones, cordless handsets and a reception console, or go softphone only and take calls on the Summit app. Mix both if that suits your team. $0 upfront hardware is included on our MAX plans.
- 4 We preconfigure and ship
We preconfigure and ship
Your handsets arrive with your extensions, auto attendant and ring groups already set up. Nothing to program.
- 5 We port your numbers and cut over
We port your numbers and cut over
We port your local numbers on the day you choose, test inbound and outbound calls with you and check connected devices. Only then do we tell you what to cancel with your old provider. Port first and cancel after: a number that has been disconnected can no longer be ported.
Features
What Your Move Includes
- Free site assessment
- : A review of your current system, numbers and connected devices, before anything changes.
- Free local number porting
- : Local (geographic) numbers moved to Summit at no charge. 1300, 1800 and 13 numbers excluded from the offer. Available until 31 December 2027. Terms apply.
- New handsets
- : Desk phones, cordless DECT handsets, reception consoles and softphone apps, preconfigured before delivery.
- Cutover testing
- : Inbound, outbound, transfers, voicemail and attached devices tested on the day.
- One bill, one support number
- : Phones, and internet and backup if you want them, from one provider.
Phone System Features Included
- Auto attendant (IVR)
- : A professional greeting that routes callers to the right person or team.
- Ring groups and call queues
- : Ring several phones at once or in turn, and hold callers in a queue when it is busy.
- Voicemail to email
- : Messages delivered to your inbox as audio files.
- Time-based routing
- : Different call handling for business hours, after hours and public holidays.
- Mobile and desktop apps
- : Make and take calls on your business number from a mobile or laptop.
- Call recording and reporting
- : Record calls for training or compliance, and see call volumes and missed calls.
Hosted PBX or Microsoft Teams Calling After Siemens?
Most Siemens and OpenScape businesses land on one of two replacements. We will recommend the one that fits how your team actually works, including the simpler one if that is the right call.
Summit Hosted PBX
- Best for
- Offices, clinics, trades and shops that answer calls on desk or cordless phones.
- How it works
- A complete cloud phone system with handsets, auto attendant, ring groups and queues, managed from a web portal.
- Pricing
- From $10 per user per month, every feature included.
- Good to know
- The closest match to how a HiPath or OpenScape system works day to day, with far less to look after.
Microsoft Teams Calling
- Best for
- Teams that already live in Microsoft 365 and Teams, including OpenScape sites that were already using a Teams connection.
- How it works
- Summit connects Teams to the phone network, so staff call from the Teams app they already use.
- Pricing
- Requires Microsoft Teams Phone licences in addition to Summit calling.
- Good to know
- Most staff use a headset and the Teams app; desk phones are optional.
Not ready to replace everything at once? OpenScape Business supports SIP trunks, so some systems can connect to Summit SIP trunks, which moves your lines and numbers first. We check whether yours can before suggesting it. If you are on a V2 board, SIP trunks alone do not change its 31 December 2026 date, so we will tell you plainly when they are only a stopgap.
Use Cases
These are scenarios, not customer case studies.
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The Accounting Firm With a System Nobody Dares Touch
Lawyers & AccountantsA mid-sized firm has run the same HiPath for years. The person who knew how to program it left, and every change means ringing an installer. We move the numbers to Hosted PBX, give the practice manager a web portal for greetings and after-hours routing, and the cupboard gets its shelf back.
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The Manufacturer Wondering About Its OpenScape Version
ManufacturingA factory office is not sure whether its OpenScape Business board is V2 or V3. The assessment answers that first. If it is V2, we lay out the realistic options side by side: a board swap and SIP trunks, or a move to the cloud, so the decision is made before 31 December rather than after.
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The Clinic With Fax Referrals and Cordless Handsets
Dentists & GPsA suburban medical practice has a main line, a fax number and cordless handsets in treatment rooms. We port the numbers, set up a reception queue, issue DECT handsets and turn the fax number into fax to email, so referrals land in an inbox.
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The Multi-Site Business With a Door Intercom and Paging
A distribution business uses its system for paging and a gate intercom as well as calls. We identify both during the assessment and agree a working path for each before cutover, so nothing is discovered the morning it stops working.
Your situation not on this list? Tell us what you run or call 1300 049 749 and we will tell you honestly whether we can help.
Still running Siemens phone systems?
Book a free assessment. We will look at what you have, tell you honestly what it will cost to keep, and show you what moving looks like, with your numbers ported free.
Why Choose Summit to Replace Siemens
- 01
We Are a Carrier, Not Just a Reseller
Summit holds its own ACMA Carrier Licence (#388) and has served Australian businesses since 2000. Your phone service, number porting 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, so you do not have to coordinate an installer, a carrier and an internet provider.
- 03
Straight Answers, Including "Not Yet"
If your system is healthy and the right move is to wait, or to start by moving your lines, we will say so. A free assessment is not a sales trap.
- 04
Your Numbers Stay Yours
Local numbers ported free, tested before you cancel anything, with port first and cancel after as our standard order.
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Bundle them on one bill →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
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Frequently asked questions
Is my Siemens system end of life?
Has Siemens abandoned this product?
Do I have to replace everything at once?
Will I keep my phone numbers?
Can I keep my Siemens handsets?
What about EFTPOS, alarms, fax and door intercoms?
What does a cloud phone system cost?
What happens if the internet goes down?
Find Out Which Version You Are Running Before the Date Does It for 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