A.syslog server 
B.GUI interface 
C.CLI 
D.text editor
E.TFTP server

A.Auto Attendant answers calls and directs them to voice mail if the extension entered does not answer the call. 
B.Auto Attendant is designed to provide operator-like functionality for after-hour, weekend, and holiday operations. 
C.Auto Attendant will answer calls and will allow the caller to self-direct by entering the extension, entering the name, or dialing 0 for the operator. 
D.Auto Attendant will answer calls, collect digits, and forward calls to the operator for further processing.