For users of Vincomm 3200, 3300, D-Link, etc. telephones and adaptors switch off Outbound Proxy in the settings.

   Depending on the model and type of VoIP-adaptor, make Outbound Proxy State field disabled or cancel points in the fields Outbound Proxy, Outbound Proxy Name, Outbound Proxy IP-Address.

   For help address to the support service.