AVer EVC900 - Manual (Page 66)

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SIP Port
Change this value only if you use specific
settings in your network system. By default,
the SIP port is set to 5060.
Enable SIP
Select Enable SIP check box and press
to activate/deactivated using SIP.
BFCP
Enable presentation sharing function in SIP. It
allows you to share the presentation file screen
to other caller in video conference meeting.