For Block Unknown Domain – this function can block incoming calls (through Phone port)
from unrecognized domain that is not specified in SIP accounts.
Web page for Vigor2710Vn---
Web page for Vigor2710VDn---
For Block IP Address – this function can block incoming calls (through Phone port) coming
from IP address.
Web page for Vigor2710Vn---
Web page for Vigor2710DVn---
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Vigor2710 Series User's Guide