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Adrian Georgescu, 06/09/2014 12:27 AM


Microsoft Lync replacement checklist

AG Projects was closely involved with menthor-ship, authoring and developing of software in the public domain for the specifications emerging of SIP SIMPLE and STOX IETF working groups. AG Projects has implemented all applications beyond VoIP that complete a SIP deployment to compete with commercial offering traditionally available from closed vendors like Apple, Google and Microsoft. The software building blocks can be used to implement a complete multimedia rich communications with audio, presence, chat, file transfer, screen sharing and video based on SIP protocol. An end-product based with these capabilities will compete with Skype and Google Hangouts for residential customers and Microsoft Lync for corporate customers, the later being the current focus.

Client Side (Blink)

Component Mac OSX Windows Linux Description
Presence Yes Yes Yes SIMPLE RLS
Contact List Yes Yes Yes XCAP protocol
Audio Yes Yes Yes Opus codec
Chat Yes Yes Yes MSRP protocol
File Transfer Yes Yes Yes MSRP protocol
Multiparty Conferencing Yes Yes Yes RTP and MSRP
NAT Traversal Yes Yes Yes ICE & MSRP Relay
Screen sharing Yes UD UD VNC protocol
Video Yes UD UD H.264 codec
Multi-language Yes No No N/A
  • N/A = not applicable
  • UD = under development

Complete RFC and standards listed here http://icanblink.com/standards.phtml

Server Side (SylkServer)

Component Linux Description
Multiparty Audio Conferencing Yes RTP mixer
Multiparty Chat Conferencing Yes MSRP Switch
Multiparty File Transfer Yes MSRP
Multiparty Video Conferencing No Colibri
Conference Participants Yes RFC4575
XMPP gateway Yes IETF STOX

Complete RFC and standards listed here http://sylkserver.com/features.phtml

Presence Agent (RLS) is provided by OpenSIPS, MSRP NAT traversal by MSRPRelay and Contact List by OpenXCAP. Ideally, these components should be integrated in SylkServer in case the solution should be deployed at customer premisses.

Updated by Adrian Georgescu over 10 years ago · 70 revisions