SIP Provider 1&1 Versatel (DE) (kb5166)

The information in this article applies to:

  • SwyxWare 11.00

[ Summary | Information ]


Information und configuration hints for SIP provider 1&1 Versatel (Germany)


General information

The Voice Business SIP Trunk from 1&1 Versatel was first tested and released with SwyxWare

The Voice Business SIP Trunk from 1&1 Versatel can only be used on Internet connections provided by 1&1 Versatel. The Voice Business SIP Trunk from 1&1 Versatel is a SIP Trunk with user authentication, i.e. you receive information on user ID, user name and password. The names may differ, or you may only receive a name or ID with password. In this case the user ID is identical to the user name when configuring the SIP trunk in SwyxWare.


SwyxWare: The Voice Business SIP Trunk from 1&1 Versatel can be used from SwyxWare on. It has to be considered that the profile for 1&1 Versatel from older SwyxWare versions is outdated and should not be used. When using an earlier version of SwyxWare with an outdated profile, incompatibilities cannot be excluded and use is at your own risk.

SwyxON: The Voice Business SIP Trunk from 1&1 Versatel is not suitable for central connection in the data center due to the dependency from the internet access.


When creating the SIP trunk group, select the profile '1und1 Versatel (DE)'. At least SwyxWare has to be used, older SwyxWare versions have an outdated profile that should not be used.

After creating the trunk group, in the property settings of the trunk group, on tab 'Profile', it is necessary to to add special number replacement rules. The following rules need to be added for inbound, calling party:
00* -> +*
+*  -> +*
0*   -> +[cc]*
*     -> +[cc][ac]*

When creating the actual SIP trunk, a SIP URI must be entered after configuration of the phone number range so that incoming calls can be assigned. The assigned number block must be taken into account in the correct format.

Number block: +49 231 9988776600 ... +49 231 9988776699
In this case, the SIP URI must be entered in the format 004923199887766*@*.

In the properties of the SIP Trunk, tab 'Number Signalling', the following configuration is recommended:
   Originator's number - if assigned to the trunk, otherwise:
   Number of the transferor

Tested Features

  • Incoming/outgoing national calls
  • Correct Calling Line Identification (CLI) on national and calls
  • Holding and retrieving calls
  • Toggeling between two calls
  • Call transfer
  • Conferencing
  • Mutually supported codecs:
    • G.722
    • G.711a
    • G.711u
    • G.729
  • Incoming/outgoing DTMF signaling in accordance with via RFC2833
  • FAX transmission via T.38

CLIP No Screening is not being supported in combination with the Voice Business SIP Trunk from 1&1 Versatel 

Test date
02/10/2018 with SwyxWare

Overview of tested SIP provider


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