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SBC engine base on openSource components
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adubovikov Merge pull request #20 from khorsmann/patch-1
Add Source-Port to reply for an better debugging
Latest commit f73ca87 May 15, 2019
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DOC Create TRUNKING_TRUNK May 13, 2019
ISO some cache stuff May 10, 2019
SbcOS Add Source-Port to reply for an better debugging May 15, 2019
bootfiles New input May 5, 2019
initramfs fixed some compiling stuff May 10, 2019
tools New input May 5, 2019
LICENSE Create LICENSE May 10, 2019 Update May 13, 2019
bootinfo.txt New input May 5, 2019
build fixed build in one script May 10, 2019
config some cache stuff May 10, 2019
livekitlib fixed some build stuff May 7, 2019
options.txt fixed some compiling stuff May 10, 2019


SBC-OS is an open-source drop-in replacement for many existing commercial Session Border Controllers designed for performance and resource optimization


  1. NAT fix including NAT ping
  2. SIP analyze and normalizing (SIP/VoIP Firewall)
  3. PIKE - limits (selfilter)
  4. Topology hiding
  5. Header manipulation
  6. SIP TLS -> SIP
  7. RTP Relay (kernel space) including QOS. Amazing performance. Around 10K CC on 1U server like DELL R360.
  8. RTP transcoding, RTP Recording (user space)
  9. SRTP->RTP and vice-versa
  10. WebRTC and IMS support including diameter.
  11. IP Trunking / Registration Trunking
  12. Monitoring and statistics including RTP/RTCP MOS/QOS (Homer/Hepic)
  13. Internal statistics / CPU/Memory/Network usage
  14. Full IPv4 IPv6 support.

Optional Features

NB! For the (Lawful Interception) LI, please contact


USB Stick

for everybody who has got a USB stick on KW 2019: the SBC-OS has been installed already. You can boot your server or laptop using this stick

user: root
password: plusnet



In the repository you will find an ISO directory that contains the files to generate an ISO image, so just go there and run a shell script inside and to generate an ISO image or copy the data to your USB stick and go to sbc/boot and run The script will make your USB stick bootable. Dont forget to install genisoimage!

How to build the system manualy:

The system requires Ubuntu 18 or Debian 9!

Required packages (Debian 9 / Ubuntu 18)

apt-get install whois dirmngr multistrap reprepro binutils squashfs-tools genisoimage make linux-headers-$(uname -r) zip

clone the repository, go to SbcOS and run:


dont forget to install: multistrap, reprepo, whois (mkpasswd), genisoimage

The script will create a rootfs squashfs image.

After go to root directory and run script:


it will generate two directories in your /tmp: sbc-data-XXXX sbc-initrfs-XXXX

and two scripts: that make an ISO image for you

Important! Please be sure that your /vmlinuz is pointing to the same version of kernel that runs now!

root@linux:sbcOS# uname -r
root@inux:sbcOS# ls -l /vmlinuz
lrwxrwxrwx 1 root root 26 May  5 23:20 /vmlinuz -> boot/vmlinuz-4.9.0-8-amd64

If you have any question, dont hesistate contact us!

Thanks Tomas M. for initramfs scripts!

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