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Adrian Georgescu, 01/30/2013 10:26 am


SylkServer allows creation and delivery of rich multimedia applications accessed by SIP User Agents. The server supports SIP signaling over TLS, TCP and UDP transports, RTP and MSRP media planes, has built in capabilities for creating ad-hoc SIP multimedia conferences with HD Audio, IM and File Transfer and can be easily extended with other applications by using Python language.

This wiki page is meant for providing technical documentation and access to the version control source code repository.

For official stable releases please visit the official web site http://sylkserver.com

The software is in active development and progress announcements will be made on SIP beyond VoIP mailing list


For the complete feature list look on the features page

SIP Signaling

  • TLS, TCP and UDP transports
  • INVITE and REFER methods
  • SIP protocol trace

Voice over IP

  • Wideband (G722, Speex)
  • Narrow (G711, GSM, iLBC)
  • Encryption (sRTP)
  • NAT Traversal (ICE)

Instant Messaging

  • MSRP protocol
  • CPIM envelope
  • Is-composing
  • Delivery reports


  • Wideband RTP mixer
  • MSRP switch
  • Multiparty screensharing
  • Conference event package

XMPP Gateway

  • Server to Server mode
  • IM (MSRP sessions and SIP Messages)
  • Presence (SIMPLE and XMPP)

XMPP gateway design

sylk-server-diagram.png (102.5 kB) Tijmen de Mes, 04/05/2012 05:30 pm