Grandstream Networks UCM6510 IP PBX User Manual page 123

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To remove a number from the Blacklist, select the number in "Blacklist list" and click on .
Note:
Users could also add a number to the Blacklist or remove a number from the Blacklist by dialing the
feature code for "Blacklist Add' (default: *40) and "Blacklist Remove" (default: *41) from an extension. The
feature code can be configured under web GUI->PBX->Internal Options->Feature Codes.
Firmware Version 1.0.0.25 UCM6510 IP PBX User Manual Page 121 of 229
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