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Connection issues can occur in the following circumstances:
Your Internet connection is inactive or unstable. If your download of the JNLP/Collab (session) files hangs (e.g., you are stuck on the Splash screen), you may have a network connection issue.
Test that you have an active Internet connection by launching the configuration room.
It is possible that a poor connection (such as a satellite, wireless or connection to a congested network) could be causing latency problems. If using a wireless connection, try switching to a wired connection. If you have other devices using the same connection, disconnect them to preserve bandwidth.
If you are able to connect but are experiencing latency problems (e.g., delays in receipt of Audio, Video and Application Sharing), there may be a problem with your connection speed. For details, see the Lowering your connection speed to resolve connection and latency issues. Latency may also indicate an issue with bandwidth. For tips on managing your bandwidth, see Best practices for managing bandwidth in web conferencing sessions.
A router or network device is blocking the connection.
Configure your personal firewall or router. Refer to the following Knowledge Base article:
How do I configure a Personal Firewall/Router for my Blackboard Collaborate web conferencing session?
A network proxy is blocking the connection.
Verify the correct proxy settings. Refer to the following Knowledge Base articles: How do I configure my Windows system and Proxy for use with Blackboard Collaborate How do I configure my Mac OS X System and Proxy for use with Blackboard Collaborate
Security software is blocking the connection.
Security or network rules are preventing connections over port 80, 2187 or 443.
Check ports 80, 2187 and 443 and ensure that they are open and accessible to elluminate.com and blackboardcollaborate.com.
Verify that all proxy configurations allow access to elluminate.com and blackboardcollaborate.com over ports 80, 2187 and 443. Refer to the following Knowledge Base article: Authentication and Port Check Process
Below is a list of common “Connection failed” errors, including links to Knowledge Base articles that discuss them:
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