Anonymous/Unsolicited Calls Protection; Figure 11: Settings To Block Anonymous Call - Grandstream Networks GXV3370 Security Manual

•
Local SIP port when using UDP/TCP:
Starting from 5060 for account 1, the port numbers increase by 2 for account x. For example, 5062 is
the default local SIP port for account 2, 5064 for account 3, etc. The local SIP port can be configured
under Account→SIP Settings for each SIP account.
•
Local SIP port when using TLS:
The SIP TLS port is the UDP SIP port plus 1. For example, if account 1's SIP port is 5060, its TLS port
would be 5061.
•
Local RTP port:
The default port value is 50040. Below is the range the GXV3370 uses for different RTP from web UI
→ Phone Settings → General Settings. (N is from 0 to 15, representing SIP account 1 to 16).
Audio RTP port:
Audio RTCP port:
Video RTP port:
Video RTCP port:
FEC RTP port:
FEC RTCP port:
BFCP Protocol port:
BFCP RTP port:
BFCP RTCP port:

Anonymous/Unsolicited Calls Protection

If the user would like to have anonymous calls blocked, please go to GXV3370 web UI → Account →
Account x → Call Settings and enable option "Intercept Anonymous Calls". This will automatically block the
SIP call if the caller ID is anonymous.
Additionally, the GXV3370 has built-in mechanism that detects and stops the spam SIP calls from ringing
the phones. Please see below web UI → Account → Account x → Advanced Settings. It is recommended
to enable highlighted options to validate incoming SIP requests.
Port_Value+10*N
Port_Value+10*N+1
Port_Value+10*N+2
Port_Value+10*N+3
Port_Value+10*N+4
Port_Value+10*N+5
Port_Value+10*N+6
Port_Value+10*N+8
Port_Value+10*N+9

Figure 11: Settings to Block Anonymous Call

GXV3370 Security Guide
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