Câu 15: 100-890: Supporting Cisco Collaboration Devices

While replacing a Cisco IP phone, the technician notices that the phone is not functional. The phone receives power from a Cisco Catalyst PoE switch, and the phone backup software image is loaded, but the phone still fails to complete the bootup. Which action recovers the phone?

1. A. perform the factory reset on the IP phone — đáp án hiện tại
2. B. verify the IP phone settings on the Cisco Unified CM
3. C. connect the IP phone to a different VLAN on another Cisco Catalyst switch
4. D. contact a Cisco TAC engineer