COMfortel® VoIP 2500 AB

Product status End-of-Support: Nov. 2015
No further software updates or upgrades

Product status End-of-Service: Nov. 2017
No further technical support

Productstatus End-of-Repair: Nov. 2017
No further repair service


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Operating system

4.4L Build 000 (Stable) | 11.01.2016
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LanguagesCurrent version
Statements of conformity 03 PDF
05 05/2011 PDF
Quick Operating Instructions 02 12/2008 PDF
Operation and Configuration Instructions 05 05/2011 PDF
Licence Information for Firmware 07 11/2013 PDF
Commissioning Instruction 05 09/2012 PDF
Commissioning Instructions 05 09/2012 PDF


Note: The settings apply to all Auerswald PBXs that offer internal IP telephony.

  1. A COMfortel VoIP 2500 AB can also be operated without COMmander or COMpact VoIP module on an Auerswald PBX (COMpact 5010/5020 VoIP, COMmander Basic.2 and COMmander Business). However, only the codec G.711 can then be used.
  2. There is a restriction with the DTMF remote inquiry of the answering machine function. The telephone cannot evaluate DTMF tones without the VoIP module (COMmander or COMpact). However, it is possible to query newly received messages via the quick polling numbers once.
    DTMF generation (for controlling external devices) must be set to DTMF-inband. This setting can be found in the telephone menu under Settings->VoIP->Provider->DTMF.
  3. If the telephone is connected to the telephone system via a VPN tunnel (VPN connection between two routers), automatic discovery of the telephone system is only possible if the VPN routers used allow multicast messages to pass through. If Multicast is not supported, the IP address of the telephone system must be entered manually into the COMfortel VoIP 2500 AB.

Note: The settings provided by us are non-binding information.