Auerswald GmbH & Co. KG was founded in 1960 in Braunschweig and remains a privately owned German company to this day. With over 60 years of experience in telecommunications, Auerswald is one of the most established manufacturers in the DACH region. Over 16,000 certified resellers across Europe distribute and install Auerswald solutions.

The COMtrexx product family is the core of the modern Auerswald portfolio: modular IP PBX systems and VoIP servers for up to 250 users and up to 250 simultaneous calls – as a hardware appliance, as a software solution or from the cloud. All systems support SIP trunking, DECT, IP telephony and integration with Microsoft Teams via PBX Call Assist 5.

Lieske Elektronik offers Auerswald products for businesses, the public sector and industrial customers. Proven German quality and excellent customer service make Auerswald the preferred choice for organisations requiring reliable and GDPR-compliant communication solutions.

COMtrexx Business & Flex

Modular IP PBX systems as hardware appliances for up to 250 users. With optional legacy interfaces for analogue endpoints and ISDN – future-proof, expandable and fully SIP-capable.

COMtrexx VM (Software PBX)

Hardware-independent software PBX as a virtual machine. Up to 250 users and 250 simultaneous calls per system – ideal for virtualisation environments and data centres.

COMpact Series

Fully modular rack and wall-mount VoIP communications servers from the proven COMpact family – for organisations combining reliable hardware with modern VoIP technology.

PBX Call Assist 5 (UC Software)

Unified communications and CTI software with Microsoft Teams integration, video chat, instant messaging, screen sharing and GDPR-compliant data handling – for modern workplaces.

IP System Phones & DECT

High-quality IP system phones from entry-level to premium models with touchscreen and video integration, plus DECT handsets for wireless mobility throughout the workplace.

COMuniq DialoX (Cloud)

All-in-one cloud PBX including personal AI assistant Shomi – for organisations seeking modern communications without their own hardware infrastructure.

► SME & Mid-Market

Scalable PBX systems for companies with 5 to 250 employees – easy to configure, GDPR-compliant and supported by a German service network.

► Trades & Services

Robust, reliable communication solutions for tradespeople, agencies and service companies – with straightforward operation and low-maintenance hardware.

► Industry & Production

Reliable voice communication for manufacturing companies, logistics operators and production facilities – including DECT for wireless mobility in production halls.

► Public Administration

GDPR-compliant PBX solutions for government agencies and municipalities with on-premise operation in Germany, secure data storage and German customer service.

► Education

Cost-effective communication solutions for schools, training centres and educational institutions – easy to administer and designed for growth.

► Healthcare

Secure voice communication for medical practices, care facilities and medical centres – GDPR-compliant, with emergency concepts and fail-safe hardware.

Auerswald Products in the Shop

PBX Systems  ►  VoIP PBX Systems  ►  IP System Phones  ►  DECT System Phones  ►  VoIP  ►  Telecommunications

Can existing analogue phones and fax machines continue to be used with Auerswald systems?

Yes. The COMtrexx Business line and the COMpact series offer optional interface modules for analogue endpoints (FXS), ISDN (BRI/PRI) and fax over IP. Existing investments in endpoints are thus protected, while the system can be gradually migrated to pure VoIP.

How many users and simultaneous calls does an Auerswald system support?

The COMtrexx family scales up to 250 users and 250 simultaneous calls per system. For larger installations, multiple systems can be networked together. For precise sizing recommendations, the Lieske sales team is happy to advise at sales@industry-electronics.com.

Is Auerswald also available as a cloud solution, and where is the data stored?

Yes. COMuniq DialoX is Auerswald's cloud PBX, operated in German data centres – fully GDPR-compliant. Alternatively, COMtrexx VM is available as an on-premise software solution in your own data centres or servers.

Auerswald Products for Your Business – Request a Quote

PBX consulting, sizing and B2B pricing from the Lieske sales team in Vörstetten.