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Unable to call VTH2421FB from VTO3211D
I got a VTO3211D-P4 and a VTH2421FB-P Both of them are brand new. VTO unit has the old v1.0 Web Server with 3.200.0012001.0.R firmware. I managed to update it to the v4.4, Plus, I am able to access the web interface, etc, etc... The only major problem is that I couldn't receive any calls on the...