Auerswald

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COMtrexx® Next

The cost-effective, powerful COMtrexx Next is the ideal solution for business communication with up to 40 participants. It offers all the advantages of the COMtrexx platform in an uniquely compact and energy-saving format.

Downloads

Filter by: Show all Application Driver Firmware
Designation
Operating system

PBX Call Assist 5 Mobile

2025.10.25 (Stable) | 06.11.2025
Google Android
Apple iOS
Go to download

COMfortel® SoftPhone Mobile

1.6.0 (Stable) | 27.06.2025
Google Android
Apple iOS
Go to download

PBX Call Assist 5

V8.9.0.10946 (Stable) | 06.11.2025
Windows Server 2016
Windows Server 2019
Windows Server 2022
Windows 11
macOS 14 "Sonoma"
macOS 13 "Ventura"
Windows 10 (ab Version 1903)
Go to download

COMfortel® SoftPhone 2

1.4.0 (Stable) | 30.10.2025
macOS
Windows
Apple iOS
Google Android
Go to download

COMfortel® SoftPhone

5.6.10 (Stable) | 02.09.2025
Windows 11
Windows 10 32-/64-Bit
Windows 8.1 32/64 Bit (Windows RT is not supported/wird nicht unterstützt)
Windows 8 32-/64-Bit (Windows RT wird nicht unterstützt)
Go to download

LAN-TAPI V2.4.x.x

V 2.4.2.42 (Stable) | 25.06.2025
Windows Server 2019
Windows 10 32-/64-Bit
Windows Server 2016
Windows 11
Windows 8.1 32-/64-Bit (Windows RT is not supported)
Windows Server 2022
Go to download

Faxdrucker Treiber

V1.4.4.3 (Stable) | 25.07.2023
Windows 10 32-/64-Bit
Windows 7 32-/64-Bit SP1
Windows Server 2008 R2
Windows 2012 Server
Windows 2012 Server R1
Windows 11
Windows Server 2022
Windows Server 2012 R2
Go to download

COMtrexx Next Firmware

Version 2.4.6 (Stable) | 05.06.2025
Go to download

Documentations

LanguagesCurrent version
Operation Instructions V13 06/2025 Online PDF
V13 06/2025 Online PDF
COMtrexx Control Center - Privacy Policy V04 10/2024 PDF
COMtrexx Control Center - Operation Manual V07 12/2024 Online PDF
V07 12/2024 Online PDF
Instructions V04 01/2025 PDF
Privacy Policy V09 10/2024 PDF
COMmander/COMpact PBX as a/b gateway V02 11/2022 PDF
V02 11/2022 PDF
V02 11/2022 PDF
Statements of conformity V01 08/2023 PDF

Operation Instructions

General information

Help/Instructions for COMtrexx from firmware version 2.4.6


Changed descriptions

Firewall releases

Updated/extended addresses.

Call forwarding

Updated/extended information on multi-level call forwarding and call forwarding loops.

Block- and allowlist

Updated information on the changed web interface.

Prevent update messages

Updated information on the changed setting.


Removed descriptions

Short Reference Identification

Query and programming digit sequences no longer supported removed.

Instructions

Version V04 01/2025

General information

Help/Instructions for COMtrexx Next from firmware version 2.4


Changed descriptions

Data protection

Notes updated regarding MFA, system events and sequence.

Initial Commissioning

Additional information on the display during the start process.

Version V03 01/2024

General information

Help/Instructions for COMtrexx Next from firmware version 2.2


Changed descriptions

Technical Data

Wall-mounted power supply type 2 and data.

Version V02 11/2023

General information

Help/Instructions for COMtrexx Next from firmware version 2.2


Changed descriptions

Technical Data

Wall-mounted power supply type and data.

COMmander/COMpact PBX as a/b gateway

General information

Instructions for COMmander/COMpact PBXs as a/b gateway on a COMtrexx


Changed descriptions

Overview of Functions

Information on the firmware version added.

Configuration of Subscribers

Information on the setting of exchange line authorisation added.

Privacy Policy

For the following products:

  • COMtrexx Advanced
  • COMtrexx Business
  • COMtrexx Flex
  • COMtrexx Next
  • COMtrexx VM Hyper-V
  • COMtrexx VM VirtualBox
  • COMtrexx VMware ESXi

For the following firmware:

  • V2.4

Language:

  • German
  • English
  • French

FAQs

Filter by: Show all Operation General Operation Software VoIP VoIP subcribers VoIP subcribers as external extensions Network VoIP provider LAN-TAPI

The required settings are described in the respective help for the telecommunications systems.

Requirements

  • Each user must have a valid PBX Call Assist 5 license with active software maintenance.
  • The UCServer must be on the latest release (version 8.8.3 or higher).
  • The UCServer's operating system is MS Windows Server 2016 or higher. The .NET Framework 4.8 is installed.
  • The UCServer must be accessible from the internet:

via UCConnect / Mobility Services (a paid additional service from Estos)

- or -

configured according to the Estos best practice article https://support.estos.de/en/procall-enterprise/best-practice-ucserver-fuer-procall-mobile-apps-einrichten

 

Compatible web browsers

Chromium-based browsers, for example:

  • Google Chrome™
  • Microsoft® Edge
  • Mozilla Firefox®
  • Apple Safari

The following are not supported:

  • Microsoft® Internet Explorer
  • Google Chrome or Mozilla Firefox on mobile devices such as iOS
  • Old versions of Microsoft® Edge (without Chromium)

 

PBX Call Assist Web does not support use on mobile devices such as smartphones or tablets running Android or iOS.
The respective PBX Call Assist Mobile App (for Android or iOS) should be used.

Note: The PBX Call Assist Client for Windows should be closed before using PBX Call Assist Web, if necessary.

Port Forwarding

The PBX Call Assist Web WebRTC application runs as a website (https://auerswald.procall.de) within a web browser and is delivered via the https protocol. This requires the https port (443, outbound) to be forwarded.
In summary, the most common port forwarding requirements for WebRTC are:

  • Ports 80 and 443 for signaling
  • Port 3478 (UDP and possibly TCP) for STUN
  • Port 5349 (TCP) for STUN over TLS
  • Ports for TURN relays, if required