Anonymous Caller Rejection blocks incoming calls from parties who
are actively blocking their outbound called ID. If the caller doesn't
have caller ID to display, the call will come through as unknown.
To enable the Anonymous Call Rejection feature:
Lift the receiver and listen for dial tone.
Dial *77 to reject calls from blocked numbers.
To disable the Anonymous Call Rejection feature:
Lift the receiver and listen for dial tone.
Dial *87 to allow calls from blocked numbers.