Vantact Softphone Lite Errors and Troubleshooting
Posted by Chris Popescu on 01 May 2020 07:22 PM
Error: "undefined external error" (after Windows 10 update 1803).
Fix microphone permission in the Windows settings (Windows Settings => Privacy => Microphone).
Error: "Unable to find default audio device".
Speakers and microphones are required. To make calls you must have input and output sound device in your system. Same for RDP connections.
Error: "An invalid parameter was passed to a system function".
Allow access to the microphone in Kaspersky Anti-virus settings.
Error: "End of file".
Change Transport from Auto to UDP.
Can't make or end a call
No sound or one-direction sound
This may happen if you use one or more routers (with NAT) on the way to the PBX. Search the Knowledgebase for your specific router, and turn off SIP ALGs.