LINUXMAKER, OpenSource, Tutorials

IP telephony solutions with Asterisk

Regardless of whether you are self-employed, a small company, a medium-sized company or a school, IP telephony (VoIP, Voice over IP) does not stop at you. With IT-LINUXMAKER you can also benefit from this new communication technology.

  • You already have cost savings because there is no need to maintain an internal telephone network since VoIP is part of your IT infrastructure.
  • Employees in the home office or in the field can always be reached on the same number.
  • With our solutions you are safe from telephone spam.
  • Your CRM system can be easily integrated into the telephone system, so that a click of the mouse makes your phone ring and the connection is established.
  • Your existing address files can continue to be used.
  • You save on your fax machine and printing costs, since faxes can also be conveniently sent directly from the workstation and received as a PDF file.

Asterisk is a free software for computers of all kinds, which offers the functionality of a telephone system. It supports IP telephony (VoIP) with different network protocols and can be connected by hardware to connections such as POTS (analog telephone connection), ISDN basic access (BRI) or primary multiplex connection (PRI, E1 or T1). The ISDN functionality in Germany has almost lost its importance after 2018 with the switch to nationwide IP telephony (Voice-over-IP).
The Asterisk works on a number of different computer systems. In addition to personal computers with an x86 processor, Asterisk also runs on devices such as the Raspberry Pi and routers that support OpenWRT.
Without special hardware, the Asterisk system can only be connected and operated via a network with VoIP end devices and VoIP telephone providers.
For the connection to conventional telephone networks or from normal end devices such as telephones, fax machines etc., additional plug-in cards or external analog adapters for analog POTS or digital ISDN trunk lines or extensions are required - which is now obsolete, since most analog connections are on IP -Telephony over the DSL connection were changed.
In addition, Asterisk supports voice services, answering machines, telephone conferences, voice dialogs (IVR) via DTMF - in this context voice recognition is possible using additional programs - directory services and delay-free cryptography.


Other functionalities:

  • Administration can be done easily via a web interface
  • With root access, all administration and customization options are available
  • There is the FaxtoMail and MailtoFax integration
  • Resilience can be guaranteed by the possible cluster operation
  • There are also functions to prevent telephone spam
  • Existing address lists can be used without any problems
  • It is possible to set up ring groups

Would you like to use Asterisk in your company, have a problem with your existing Asterisk telephone system or need general advice? Then IT-LINUXMAKER is the right contact for you! With our many years of expertise in the areas of Voice over IP, Asterisk and network technology, we can offer you a reliable solution quickly and inexpensively.

Support for every size

Whether a one-man company, a large company or even a large call center. We know Asterisk down to the last detail and provide support for all projects in which open source telephony software is used.

IT service and IT consulting

The digitization of business life, essential production processes and private life is in full swing. At the same time, threats from server failures, viruses and cybercrime are increasing. The whole thing is reinforced by neglecting IT security both in the private sphere and in the business world. Protective mechanisms that are really necessary are usually only considered when the damage has already occurred and the restoration of the IT infrastructure has caused enormous costs.
Linux offers you a secure basis in your IT infrastructure right from the start. On the one hand, because it has always been conceived as an operating system geared towards network operation. On the other hand, because the free availability of the source code makes the possibility of defective or misused functions almost impossible. In addition, “Open Source” has always meant permanent improvement by innovative specialists from all over the world. In the meantime, more and more users trust Linux, which among other things provides the kernel for the numerous Android installations, including companies and institutions such as Siemens, BMW, Lufthansa, Deutsche Post AG, Greenpeace and state institutions including the Federal Commissioner for Data Protection.
You are a company, a medium-sized company, a craft company, a sole trader with the appropriate IT infrastructure and you want to fully satisfy your customers with your products. Or you are a private individual with corresponding support requests. Your IT infrastructure should work reliably around the clock. As an expert in this field, IT-LINUXMAKER can protect your information effectively and quickly. With the services of IT-LINUXMAKER you secure your competitive advantage through the stability of your IT infrastructure and your data.

The support contracts from IT-LINUXMAKER are the ideal plus for your IT or development department. IT-LINUXMAKER supports you in all situations related to Linux with administration, monitoring, configuration, troubleshooting and script programming. Where your IT infrastructure is located, how large it is or how many users work in it does not matter for IT-LINUXMAKER.

Checklists - safe digital work

Since the beginning of the corona pandemic, many companies have also been organizing their work via home office regulations. The tips from IT-LINUXMAKER in a practical checklist format show what needs to be considered.

You can find all checklists for safe digital work here:

Secure passwords with the password card

Generate secure passwords of any length with the passwort card. You can check it out here.



Our fees depend on the service/product and the scope. Therefore, we can only state our fees in an offer if we already know your request.


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