Have a client who is getting calls, always from the same number in another area code. The calls have not gotten to the point where he can take legal action. His carrier (Time-Warner Telecom) says they cannot block calls. His equipment is an Avaya ACS with Partner Messaging, and all calls are first answered by the auto attendant. The phone equipment cannot do this. Is there a device that can be put on the line to block particular numbers? Have not started googling yet.