A:Answer Yes, Call Block
This unit can block calls by storing the desired items in the call block list beforehand (Caller ID subscribers only).
“Block a single number”: The unit blocks calls from specific phone numbers stored in the call block list.
“Block range of numbers”: The unit blocks calls that begin with a number stored in the call block
list, such as a toll-free phone number prefix or certain area codes.
"Block unknown CID": The unit blocks calls that have no phone number.
