Which problem is a possible cause of this issue?

When a new SIP phone is registered to Cisco Unified Communications Manager, it keeps failing and showing an `unprovisioned` error message in the phone display.

Which problem is a possible cause of this issue?
A . Auto-registration is disabled on the Cisco Unified Communications Manager nodes and the phone device does not have a DN configured.
B . The DN assigned to the phone is already in use by another SIP phone.
C . The phone cannot download and install the latest firmware.
D . The DHCP settings are set incorrectly and the phone does not have an alternate TFTP defined.
E . The DN configuration for this phone is shared with an SCCP phone, which is not supported.

View Answer

Answer: A