Offline Message Storage Application¶

• Add failure route to OpenSIPS for chat sessions
• SylkServer answers the session in behalf of the called user
• SylkServer sends an automatic answer with 'I am offline but you can type a message'
• Session is kept open for 90 seconds so that remote party has the chance to write something if he did not already before connect
• Session is closed and saved to local history database
• SylkServer detects when targeted user comes online
• Establish a new session to the user that came online and fake the original caller, deliver the stored messages, hangup and wipe delivered messages