Disable receiving direct IP call on GXV3370



We received at lot of call from number 10, 101, 1010.
To avoid this we would like to disable the feature to receive direct ip call or to limit to our server. How can we securize this ?



And search ghost call (same function on all units)


Account 1–>SIP Settings–>Security Settings
(with pcodes for provisioning if needed)

The first setting alone should correct the issue

Check SIP User ID for Incoming INVITE: Yes
P258 = 1

Validate Incoming Messages: Yes
P2306 = 1

Authenticate Incoming INVITE: Yes
P2346 = 1


I found that having one of the 16 accounts checked as active, with blank fields throughout, and having the above items unchecked would allow a direct ip call to slip through.