3CX SIP Trunk Providers - Germany
These SIP Trunk providers in Germany have been tested and certified by 3CX. We strongly recommend using a preferred or supported SIP Trunk service provider. The 3CX team makes sure that all templates from listed SIP Trunk Providers are updated and tested with every release ensuring no issues arise for our users.
Registration-based trunks with no IP fixation remain the preferred option in a hosted environment. This is because in certain cases the Public IP of your Hosted by 3CX can change unexpectedly. Although this is not a regular occurrence, if this happens, you will temporarily lose the ability to make and receive calls via your IP-based trunks.
Read our guide on how to configure a SIP Trunk / VoIP Provider. This covers the generic steps required to configure a trunk with 3CX. Some providers may need special configuration requirements. Before choosing a SIP Trunk provider in your region, carefully check our listing for these special requirements and be sure to follow any extra configuration guides added.
Preferred Providers
Preferred Providers are compatible with all 3CX installation modes. They are thoroughly tested with each build of 3CX and require no manual configuration. You can simply plug and play your PBX with a SIP Trunk of your choice.
Capabilities
SMS Support | No |
Anonymous Calling | No |
Clip No Screening Support | Yes |
Fax Support | Yes - T38 Bypass |
SIP TLS Support | No |
IPV6 Ready | No |
Online Sign-Up & Portal | Yes |
Important Configuration Notes
Enter the main trunk number as E164.
For the number to be delivered in E164: contact your partner to enable the option “Called Party Format”
Capabilities
SMS Support | No |
Anonymous Calling | Yes |
Clip No Screening Support | Yes |
Fax Support | Yes - T38 Bypass |
SIP TLS Support | No |
IPV6 Ready | No |
Online Sign-Up & Portal | Yes |
Important Configuration Notes
Enter the main trunk number as E164.
Be sure to follow the configuration guide.
Supported Providers
Capabilities
SMS Support | No |
Anonymous Calling | Yes |
Clip No Screening Support | Yes |
Fax Support | Yes - Audio |
SIP TLS Support | Yes |
IPV6 Ready | Yes |
Online Sign-Up & Portal | Yes |
Important Configuration Notes
Deutsche Telekom (CompanyFlex)
Enter the main trunk number as E164.
You can register your CompanyFlex SIP trunk via TCP with a Deutsche Telekom internet connection. If so, select the “Deutsche Telekom (CompanyFlex - VoiceData)” template from the providers' list.
Be sure to follow the configuration guide.
Capabilities
SMS Support | No |
Anonymous Calling | Yes |
Clip No Screening Support | Yes |
Fax Support | Yes - T38 Bypass |
SIP TLS Support | No |
IPV6 Ready | Yes |
Online Sign-Up & Portal | Yes |
Important Configuration Notes
Enter the main trunk number as E164.
Be sure to follow the configuration guide.
Capabilities
SMS Support | No |
Anonymous Calling | Yes |
Clip No Screening Support | Yes (Separate Service) |
Fax Support | Yes |
SIP TLS Support | No |
IPV6 Ready | No |
Online Sign-Up & Portal | No |
Important Configuration Notes
Enter the main trunk number as E164.
Registrar address will be provided to you by EWE Tel based on your account.
Supported (Dedicated Servers Only)
Supported Providers (Dedicated Servers only) are tested against 3CX Hosted and on-premise installations. Not compatible with 3CX FREE/SMB. Configuration may require a few extra steps.
Capabilities
SMS Support | No |
Anonymous Calling | Yes |
Clip No Screening Support | Yes |
Fax Support | No |
SIP TLS Support | No |
IPV6 Ready | No |
Online Sign-Up & Portal | No |
Important Configuration Notes
Not compatible with Hosted by 3CX.
Enter the main trunk number in the international number format (e.g. 492115684962).
Capabilities
SMS Support | No |
Anonymous Calling | No |
Clip No Screening Support | No |
Fax Support | Yes - Audio |
SIP TLS Support | No |
IPV6 Ready | No |
Online Sign-Up & Portal | No/Yes |
Important Configuration Notes
DeutscheTelekom (All IP)
Not compatible with Hosted by 3CX.
Enter the main trunk number in the national number format (e.g. 02115684962).
Be sure to follow the configuration guide.
Capabilities
SMS Support | No |
Anonymous Calling | Yes |
Clip No Screening Support | Yes (Separate Service) |
Fax Support | Yes - Audio |
SIP TLS Support | No |
IPV6 Ready | No |
Online Sign-Up & Portal | Yes |
Important Configuration Notes
Deutsche Telekom NGN (SIP Trunk)
Not compatible with Hosted by 3CX.
Enter the main trunk number as E164.
Be sure to follow the configuration guide.
Capabilities
SMS Support | No |
Anonymous Calling | Yes |
Clip No Screening Support | Yes (Separate Service) |
Fax Support | Yes - T38 Bypass |
SIP TLS Support | Yes |
IPV6 Ready | Yes |
Online Sign-Up & Portal | Yes/No |
Important Configuration Notes
Enter the main trunk number as E164.
Be sure to follow the configuration guide.
Capabilities
SMS Support | No |
Anonymous Calling | Yes |
Clip No Screening Support | Yes |
Fax Support | No |
SIP TLS Support | No |
IPV6 Ready | No |
Online Sign-Up & Portal | No |
Important Configuration Notes
Enter the main trunk number as E164.
Choose between 2 supported Vodafone trunks: R3.b the basic trunk or R4.a which includes additional features: Connected Line Identification Restriction / Presentation (COLR/COLP) and 302 diversion.