Grandstream Networks UCM6510 IP PBX - SIP Settings; SIP Settings;General

Firmware Version 1.0.1.12
UCM6510 IP PBX User Manual
Page 229 of 277
Max Unvalidated Call Numbers
Configure the maximum number of unvalidated calls for all IP addresses.
Call Number Limits
Configure to limit the number of calls for a give IP address of IP range.
IP or IP Range
Enter the IP address or a range of IP addresses to be considered for call
number limits.
For example:
11.11.11.11
11.11.11.11/22.22.22.22.