360° COMmunication

Everything from a single source, for every company and sector. Flexible and available, wherever and whenever it's needed – that's what we want from communications technology nowadays. We are one of the few manufacturers in this sector who can provide a comprehensive portfolio of products and services that work seamlessly with each other, and are designed to suit your exact requirements. From ICT systems to the very latest telephones, IP DECT systems, SIP trunks and cloud services: we aim to create a tailor-made solution for you, with products and services of the exceptional quality for which Auerswald is renowned. COMmunication is our passion, and has been for more than 60 years – we're proud to say "Made in Germany".


Find out why Christian Auerswald believes his company is ideally positioned to meet the challenges of the future here.
(Interview is in German, please turn on subtitles)


The COMtrexx Soft PBX solution for purely software-centric markets and expansion levels.

  • Up to 250 users and 250 parallel calls.
  • All COMtrexx functions in one license.
  • Exceptional scalability and cost effectiveness, thanks to the floating user licence model.
  • Available as a hardware appliance or a VM solution.
  • Optimised for COMfortel D-Series SIP telephones.
  • Roaming user functionality, for use with a range of different devices.
  • Fully automated plug-and-play provision for high-volume roll-outs.

COMfortel® D-Series

COMfortel D-Series SIP telephones are optimised to operate with COMtrexx or for integration in existing IT infrastructures, including those from third-party suppliers.

  • HD audio quality with wideband
  • Full-featured native VPN client for home office and branch operations
  • Easier login/logout process on COMtrexx
  • Professional headset connection for maximum productivity
  • Zero-touch provisioning for faster set up
  • Versatility and flexibility of use, thanks to LUA scripts
  • Integrated Ethernet switches to minimise infrastructure costs
  • Dual stack IPv4/IPv6 to future-proof your system

COMfortel® SoftPhone

COMfortel SoftPhone is the cost-efficient, up-to-date and intuitive solution for the implementation of mobile workplace concepts for COMtrexx and COMpact systems. SIP telephony and company-wide chat enable the integration of every employee and availability from all locations - whether in the office, at home or on the go. Benefit from all the advantages of an on-prem solution with secure, always available cloud technology with quality Made in Germany.

  • Entry level soft client for SIP telephony and messaging
  • Secure and simple PBX connection from anywhere via our free cloud service
  • Cross-platform: Apps for Windows, iOS & Android

PBX Call Assist

As Unified Communications & CTI software, PBX Call Assist provides you with a seamless transition between office and home office. You can be reached on all your end devices with just one phone number. Thanks to the additional chat function, we also make your everyday work easier with a fast and uncomplicated exchange of information.

  • Platform-independent communication for PC, laptop, tablet or smartphone
  • SIP softphone as a virtual telephone for desktop and mobile clients including MS Teams integration
  • Presence management for displaying the availability of your team
  • Video conferencing and chat for internal information exchange with maximum security of company data