New Update of the 3CX SBC (Session Border Controller)

Connect remote offices with the 3CX SBC for Raspberry Pi and WindowsFollowing the latest updates of our CRM Plugin and the MacOS and Android clients we’re now releasing a new update of the 3CX SBC. The 3CX SBC is a tunnel included in 3CX Phone System which makes the bridging of remote offices and extensions much easier.

The 3CX SBC is available for Windows and Raspberry Pi, this update applies for both. The latest version includes an added Failover option to ensure that your PBX is always up and running and no down-time occurs. This release also includes the following:

  • Added Failover option
  • Added encryption securing calls
  • Auto reconnection when network disconnects
  • Fixed one way audio caused by Hold/Resume
  • SBC now performs frequent DNS resolutions

Download link and Documentation

3CX SBC Manual
Installing 3CX SBC for Windows
Installing 3CX SBC for Raspberry Pi
Download the latest 3CX SBC

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  1. Brian Mills

    “Windows SmartScreen prevented an unrecognized app from starting..” on Windwos 10 Home 64 bit.

    February 2, 2016 at 11:00 pm
    • Charalambos Eleftheriou

      @Brian, From the Windows smart screen message click ‘More Info’ then ‘Run Anyway’ this will then allow the app to run.

      February 2, 2016 at 11:14 pm
  2. Does this update include better use of the multi-core capability of the rasberry pi 2?

    February 3, 2016 at 7:58 am
    • Charalambos Eleftheriou

      @Matt,thanks for the question. Nothing has changed regarding this. SBC on the Pi makes good use of resources.

      February 10, 2016 at 9:26 am
  3. This is one of my favorite features of 3CX that no other phone system has taken the effort to do. Some sites have router issues, ISPs blocking ports, double Nat, and the list goes on. The 3CX SBC is a life line to get rid of the problems and make remote VoIP phones just work.

    I’m especially excited about the auto reconnection with this update.

    Way to go team 3CX

    February 4, 2016 at 10:38 am
  4. Rigardt

    will this version only work with 3cx version 14 or will it connect and work with a ver 12 installation ?

    February 5, 2016 at 3:59 pm
  5. Jeff Hind

    How will the new fail-over option work? If we use the SBC for a client whose phones are connected to a PBX at for example PBX IP address of and that PBX would fail, would the SBC automatically point the phones to PBX IP address of

    February 26, 2016 at 5:19 pm
    • Andreas Christodoulou

      @Jeff The SBC it will automatically connect to the failover IP . The phones will not notice that change.

      March 2, 2016 at 9:20 am
  6. Jamie

    How many simultaneous calls can be handled with an SBC on a Raspberry Pi?

    April 1, 2016 at 7:47 pm
    • Charalambos Eleftheriou

      @Jamie, We recommend no more than 5 IP Phones behind an SBC on a Raspberry Pi therefore 5 simultaneous calls.

      April 1, 2016 at 8:34 pm
  7. Jamie

    @Charalambos Eleftherios: Thank you for the quick reply. Is there documentation on what hardware and software to use for specific customer cases? For example: a customer with 64 concurrent calls and 200+ extensions.

    April 2, 2016 at 9:15 pm
  8. Jamie

    That’s a great sheet, thank you!

    April 2, 2016 at 10:28 pm