SIP Provider Deutsche Telefon (DE) (kb4977)

The information in this article applies to:

  • SwyxWare 2015

[ Summary | Information | Links ]


Information und configuration hints for SIP provider Deutsche Telefon (Germany).


General information

The SIP Trunk from Deutsche Telefon was first tested and released with a SwyxWare 2015 R40.3.0

Deutsche Telefon is offering a SIP trunk with user authentication. You have received information about UserID, UserName and UserPassword, whereas the naming may differ, or you might have only received UserName and -password. In this case, UserID and UserName are identical. 


SwyxWare: The SIP Trunk from the Deutsche Telefon can be used according to the settings listed below from SwyxWare 2015 R40.3.0 on. When using an earlier version of SwyxWare, incompatibilities cannot be excluded and the use is at the user's own risk.
SwyxON: The SIP Trunk from the Deutsche Telefon is not suitable for central connection in the data center.


During creation of the SIP trunk group, profile 'Deutsche Telefon (DE)' must be selected. If the profile is not included in the corresponding list, you can download the required CustomProviderProfiles.config for SwyxWare at the end of this article. For more information about using this file, see Configuration and Adaptation of SIP Providers via Provider Profiles (kb3436).


In order to assign incoming calls to the correct trunk, it is necessary to configure a SIP URI for the trunk. The assigned number block and the numberformat must be considered.
Numberblock: +49 231 9988776600 ... +49 231 9988776699
In this case, the SIP URI must be entered in the format 023199887766*@*.
IMPORTANT: For outgoing calls, it is necessary to configure a Session interval of 1800 (seconds), otherwise calls may be terminated.
To configure the session timer, in the windows registry underneath HKLM\Software\Wow6432Node\Swyx\LinkMgr\CurrentVersion\Options two new DWORD values  named SipSessionTimerIntervalSeconds and SipMinSessionTimerIntervalSeconds have to be created and assigned a value of 1800 (decimal). After creating these values, the LinkMgr service must be restarted.
Important: These settings will affect all SIP trunks.
Tested Features
  • Incoming/outgoing national calls
  • Incoming/outgoing international calls
  • Correct Calling Line Identification (CLI) on national and international calls
  • CLIP No Screening
  • Holding and retrieving calls
  • Toggeling between two calls
  • Call transfer
  • Conferencing
  • Mutually supported codecs:
    • G.711a
  • Incoming/outgoing DTMF signaling in accordance with via RFC2833
  • fax transmission via T.38


Test date:
31/08/2017 with SwyxWare 2015 R40.3.0

Overview of tested SIP provider


As far as software supplied or used by us, includes open source elements the additional terms under apply in addition. An overview which products from the Swyx portfolio include open source elements and which open source license is relevant can be found under

The third-party contact information included in this article is provided to help you find the technical support you need. This contact information is subject to change without notice. Swyx in no way guarantees the accuracy of this third-party contact information nor is responsible for it's content.


Comment on this article

If we have any follow-up questions, where can we contact you?

E-Mail Address (optional)


This feedback form can't be used for support requests. Those requests must be directed to your Swyx reseller or distributor.