SIP SIMPLE Client SDK version 5.4.0 has been released.
This version delivers interoperability with audio and video WebRTC end-points, and zRTP key negotiation with Sylk Suite.
Full release notes and discussion are available in the announcement on the SIP Beyond VoIP mailing list: May 2026 announcement.
AG Projects has rolled out zRTP end-to-end encryption across its Sylk Suite stack. The implementation is cross-platform and supported by the SIP SIMPLE client SDK, the Blink SIP client, and the Sylk Mobile and Web clients.
On WebRTC clients (mobile and browser) the implementation relies on the Insertable Streams technique. Insertable Streams expose encoded media frames to JavaScript before they hit the network, allowing zRTP-derived keys to be applied end-to-end on top of the hop-by-hop SRTP that the WebRTC stack already provides — so audio and video stay encrypted all the way between peers, even when traffic traverses SylkServer or a TURN relay.
Implementation details, key-exchange flow and verification UX are documented in the Sylk Mobile repository: github.com/AGProjects/sylk-mobile/tree/master/docs/encryption.
AG Projects provides now standard with its SIP Thor platform integration with MS Teams.
For more information see:
https://docs-new.sipthor.net/book/general-sip-platform/article/routes_msteams/
The open source video conference application Sylk Suite is last night declared the winner of the ISOC.nl Innovation Award 2020.
https://opendomein.nl/pipermail/perslijst/2020-June/000020.html
Sylk Pushserver was designed to act as a central dispatcher for mobile push notifications inside RTC provider infrastructures. Both the provider and the mobile application customer, in the case of a shared infrastructure, can easily audit problems related to the processing of push notifications.
SIP SIMPLE client SDK can now be used for audio, chat, file transfer sessions on Raspberry Pi runing Debian 10.
Great for automated testing of SIP infrastrutures or IoT projects, see examples for usage of command line clients here:
https://sipsimpleclient.org/testing/
The bre-built debian packages can be downloaded from:
http://download.ag-projects.com/SipClient/Raspberry/
Note: Echo cancellation is not compatible with arm architecture and must be disabled by using sip-settings utility.
Sylk WebRTC platform is AG Projects latest product for multimedia mobile communications. Using WebRTC specifications supported by latest mobile end-points and SIP protocol for the core network, it provides the ultimate fixed/mobile convergent and scalable solution for RTC service providers.
Customers who purchased Multimedia Service Platform or its SIP Thor variant can purchase the platform as an add-on.
Multimedia Service Platform has been renamed to SIP Thor. All support contracts for Multimedia Service Platform remain valid, nothing has changed except for the platform name.
Not so long ago the WebRTC project celebrated its 5th birthday. When it launched we kept it in our rear mirror but we where busy with other things, so we didn't jump right in until about two years ago.
This is the story of what WebRTC means to us, how we use it, and what we accomplished with it at AG Projects.
SylkServer WebRTC implementation will provide easier client side development and integration with web applications and mobile devices powered by WebRTC enabled engines, for more info go here
April 11th, 2014. Blink Qt for Window has been release with complete support for MSRP protocol (chat sessions, file transfer and multiparty conferencing). For more information visit `http://icanblink.com <http://icanblink.com>`_
A special edition of Blink for SIP2SIP with OPUS codec 48kHz has been launched http://sip2sip.info