We are excited to announce the general availability of the Sipwise C5CE and C5PRO mr7.0.2 release.

What is the Sipwise C5 platform?

Sipwise C5 PRO Architecture Overview

The Sipwise C5 platform is a highly versatile open source based VoIP soft-switch for ISPs and ITSPs to serve large numbers of SIP subscribers. It leverages existing building blocks like Kamailio, Sems and Asterisk to create a feature-rich and high-performance system by glueing them together in a best-practice approach and implementing missing pieces on top of it.

Sipwise engineers have been working with Asterisk and Kamailio (and its predecessors SER and OpenSER) since 2004, and have roles on the management board of Kamailio and are contributing to these projects both in terms of patches and also financially by sponsoring development tasks. The Sipwise C5 platform is available as a Community Edition (CE), which is fully free and open source, and as a commercial PRO appliance shipped turn-key in a high availability setup.

The Sipwise C5 provides secure and feature-rich voice and video communication to end customers (voice, video, instant messaging, presence, buddy lists, file transfer, screen sharing, remote desktop control) and connect them to other SIP-, Mobile- or traditional PSTN-networks. It can therefore act as open Skype replacement system, traditional PSTN replacement, Over-The-Top (OTT) platform and also as a Session Border Controller in front of existing VoIP services in order to enable signaling encryption, IPv6 support, fraud- and Denial-of-Service prevention. Another use-case is to act as a Class4 SIP concentrator to bundle multiple SIP peerings for other VoIP services.

What’s new in mr7.0.2?

The most important changes for mr7.0 compared to mr6.5 are:

  • Preparation for migration to Debian/buster [TT#28953]
  • Migration of proxy config to new kamailio pv_headers module [TT#32007]. For additional details have a look in Appendix D: “New kamailio pv_headers module”
  • [PRO] Implement full node restore/reinstall from peer (like Carrier deployment) [TT#44969]
  • Implement always-transcode flag in rtpengine as preference [TT#37690]
  • Implement recordings deletion from the physical NFS mount in the UI/API [TT#40453]
  • Implement ‘ngcp-service sync-state’ to ensure all necessary components are up and running. ‘ngcpcfg apply’ executes ‘ngcp-service sync-state’ at the end. It will stop unnecessary components and start all the necessary ones. [TT#43700]
  • [PRO/Carrier] Add GRML rescue option to PRO/Carrier iPXE boot menu [TT#45807]
  • Move systemd coredumps from ‘root’ partition to ‘data’ partition [TT#46902]
  • Improved fraud check scripts performance [TT#48196]
  • /api/soundssets add support to use existing system sound sets [TT#47569]
  • [PRO/Carrier] Faxserver now supports a simplified numbers rewrite logic by default [TT#44603] Available in the config.yml as faxserver.number_rewrite_mode, where supported values are ‘default’ and ‘extended’

See the list of all changes in PDF Changelog mr7.0.2

What is mr7.0.2?

The build mr7.0.2 is the last build for supported non-LTS release mr7.0, mr7.0.2 provides new features and bugfixes.

Is mr7.0 LTS (long time supported) release?

No. Release mr7.0 is no longer supported as build mr7.0.2 has been published.. See the release calendar on https://www.sipwise.com/releases/.

How do I test-drive the new version?

As usual, we’re providing a VMWare Image, a Virtualbox Image and a Vagrant Box for quick evaluation testing. For those of you using Amazon Cloud we provide the EC2 AMIs in the following regions:

  • AMI ID for region us-east-1: ami-033e3aacb541b5421
  • AMI ID for region us-west-2: ami-04b503cbd12d262d6
  • AMI ID for region us-west-1: ami-07350fbc1c852829b
  • AMI ID for region eu-central-1: ami-0fb5ab06cdaa01eaf
  • AMI ID for region eu-west-1: ami-09f9b9bf6394f9962
  • AMI ID for region ap-southeast-1: ami-0ec53f771f0ccea55
  • AMI ID for region ap-southeast-2: ami-01287012c591c1b88
  • AMI ID for region ap-northeast-1: ami-0c7c176c056ca023b
  • AMI ID for region sa-east-1: ami-06a75653a8e9a3d0f

Check the relevant section in the Sipwise C5 CE Handbook for detailed instructions.

How do I install the new version or upgrade from an older one?

For new users, please follow the Installation Instructions in the Handbook to set up the Sipwise C5 CE mr7.0.2 from scratch.

For the users of the previous version of Sipwise C5 CE, please follow the upgrade procedure outlined in the Handbook. If you have customized your configurations using customtt.tt2 files, you must migrate your changes to the new configuration files after the upgrade, otherwise, all your calls will most certainly fail. Hint: modern patchtt.tt2 framework can help you here in the future.

How can I contribute to the project?

Sipwise is publishing software components at github.com/sipwise. Please check it regularly for new projects to appear there, and feel free to fork them and send us pull requests. For development related questions, please subscribe to our Dev Mailing-List at lists.sipwise.com/listinfo/spce-dev.


We want to thank our PRO/Carrier customers and the Sipwise C5 CE community for their feedback, bug reports and feature suggestions to make this release happen. We hope you enjoy using our software and keep your input coming. A big thank you also to all the developers of Kamailio, Sems and Prosody, who make it possible for us to provide an innovative and future-proof SIP/XMPP engine as the core of our platform! And last but not least a HUGE thank you to the Sipwise development team, who worked insanely hard to create this release. You are awesome!