We got your communication covered. Fail-safe and compliant.

Make use of of all the benefits of our Unified Communications Solution even with your local on premises system.

Consertis telephone systems based on Wildix are the prime choice for everybody looking for their own modern, communication platform.

Schedule Online Appointment
consertis on prem hero en


Consertis On Premises

Do you want to add a local failover to your cloud phone system? As a backup in case the cloud ever fails?

Your business must meet strict compliance requirements? Or you would like a device based telephone system to keep things under control?

You are in the public, financial, health or government sector? Maybe an embassy or NGO? In search of a solution for your hotel, medical practice or law firm?

snom konferenz consertis

Consertis On Premises includes:

  • All the benefits of Unified Communications and Cloud Telephony
  • Can be operated alone or hybrid in combination with the cloud
  • Can be operated in combination with other company locations
  • Live chat with presence display directly from your website, webinar and video conferencing solutions, and more.
  • Premium state-of-the-art telephone system
  • Countless features and functions
  • Ongoing support, also at your location
  • Support-Hotline
  • Telephony hardware can be ordered as add-on
  • Can be booked as “Hardware as a Service”
  • Based on Wildix

Always connected – no matter where

festnetz icon consertis


Connect existing landline/fax devices via router or adapter and you are ready to go.

smartphone icon consertis


All you need to do is download a VoIP-App for your specific smartphone – and you can start making phone calls over the internet right away.

voip icon consertis


You already have all you need, adapter & co. are not necessary. Plug it in, dial a number and listen to it ring.

computer icon consertis


Install the softphone and start making phone calls with headset, Bluetooth ear phones or installed speakers.

on prem funktionen features

Features & Functions

You Name it. We Have it.

You get much more than just a telephone system. With the Unified Communications solution from Consertis based on Wildix you get a lean and at the same time highly efficient communication apparatus. Chat, video conferencing, webinars, presence display, and much more. – all in one interface.

Needless to say, our VoIP-telephone systems are all fully equipped with standard features such as phone conferences, Fax2Mail, time-controlled forwarding, telephone exchange, and much more.

Next to over 150 standard features, you and your employees can look forward to the following unique features – be it in the office, at home or on the go:

Locally, in the cloud or hybrid?

Use all the advantages and features of cloud telephony locally as well.

With or without cloud. Just as you wish. And always with the full communications power of the latest unified communications solution.

wildix pbx

Small hardware, full communication power

€ 35.-


Use your phone system locally for even more control and failover protection.

Additional Support Packages

Book the add-ons you need: whether it is cloud-backup, telephone-admin-support or local hands-on support. Extend your local telephone system with our additional support offer.


Overview of all per-minute and bundle charges- in Austria as well as internationally to landline and mobile phone networks.

Other Services​

We are always by your side for individual requests! And we work as speedily as possible.

€ 120.-

per hour


Yes. You install a VoIP app (Sip-Phone) like Groundwire, Zoiper or similar.
These integrate with your smartphone, and with them you can call your contacts as you would from the telephone system. Internal calls are free, and external callers will see your landline number. Your smartphone only needs internet access.

With VoIP (Voice over Internet Protocol) you make your phone calls over the internet yet comparable to a classic ISDN landline. Until now, two separate networks were necessary for internet use and landline extension. VoIP allows you to make your calls via the same network as your internet connection.

In short: No hardware incompatibilities. Our system can simply be migrated in case of hardware replacements with continuous system updates guaranteeing standard compatibility.

Extended version: With customary telephone systems, if a device breaks then it can only be replaced with a new one from the same model range. If a model range is no longer available (after several years model ranges are usually phased out) then the ENTIRE telephone system needs to be replaced because of one defective device generating high costs. This will not happen with a Consertis telephone system since it is based on Fusion PBX and SIP-enabled devices. They are compatible with all devices true to standard and we can guarantee the exchange of defunct telephone devices even 10 years from now.

No. Our telephone system has no limits. You can have as many extensions and use as many channels as you like. Only the hardware in use sets certain limits – but you will receive sound advice from us before choosing the best possible hardware solutions.

No. The telephone system is set up according to the specifics of Consertis as carrier network.
This gives you the safeguard of having a one-stop contact and rapid problem resolution in case of any complications.r einen Ansprechpartner zu haben und so eine rasche Problembehebung zu gewährleisten.

Almost anything. Please speak to our consultants regarding your exigencies under phone: +43-1- 39800 or via email We welcome every new challenge!

Our telephone system is a server and as fail-safe as any other server.
If requested, the regular methods for reducing system errors in all servers are applied: clustering, emergency power supply, etc…

CRMMicrosoft 365, Teams.

You will find the prices for our bundles in our online shop. For all unbundled services we charge € 120 per hour (excluding VAT) accounted for in 15 minute segments. And we are speedy!

For all those who have more than 20 extensions and want to maintain physical control or simply do not want to outsource. This is especially true for businesses and institutions that must meet high compliance standards such as public service, medical practices, law firms, etc.

VoIP- or SIP-Apps are applications that connect your smartphone to your VoIP/SIP-enabled telephone system. In doing so, your smartphone turns into the equivalent of your desk phone and you can be reached under your landline number respectively with in-coming calls, your customers see your business and not your mobile phone number. Some of these apps offer basic features free of charge, other features need to be bought.
We recommend the Apps ZOIPER and Groundwire.

Telephone systems are complex and Fusion PBX is no exception. We stay by your side in case you need any support respectively we offer valuable additional services such as back-ups.

Of course! Please contact our sales & distribution representative at phone: +43-1-39800 or email

Yes. You install a softphone such as Zoiper, Ninja, Jitsi or similar.
Depending on the software, these can also integrate with Outlook. This allows you to call your contacts directly from Outlook. Internal calls are free, and external callers will see your landline number. Your PC only needs internet access.

It not only works, but works so well that Austria AT-Telekom has started to switch off standard ISDN-lines in 2020. So what are you waiting for?

Our on-prem solutions come with according support suites.
They range from simple call-in support to complete support arrangements including hardware replacement of the system server.

With all devices and every software based on the SIP-standard.
By now, this is a vast market and there is no requirement left that cannot be met.

Yes. We also carry out installations on Raspberry Pi (16 extensions).

Consertis IT is always available for problems on the ground with routers, firewall, switches and all other VoIP components.

Yes. Since our telephone system comes without licensing costs or artificial limits the price is unrivalled – and the price difference gets more pronounced the more users the system has.

Yes. Even though the technology on which it is based – ISDN – is nearing the end of its life cycle. We will offer and operate pre-selection until the definite end.

Software you install on your PC/MAC in order to make phone calls via your telephone system, turning each computer into an extension. An actual telephone device is no longer necessary. The basic features of this type of software often are free of charge; other features can be bought as add-ons We for instance recommend ZOIPER.