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VoIP Phones - Grandstream HT8xx: Difference between revisions
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===Ghost calls?===
If you get suspicious calls from numbers like '1009' and '101' or where the call is silent, then it could be because the HT801 is accepting calls from any one on the internet - instead of just from the A&A servers. This 'feature' can be disabled:
# From the Grandstream's web interface: Click on FSX port on the top/right side
# Set: 'Allow Incoming SIP Messages from SIP Proxy Only: '''Yes'''
== NAT notes ==
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