An administrator installed a Cisco Unified IP 8831 Conference Phone that is failing to register. Which two actions should be taken to troubleshoot the problem? (Choose two.)

For a Cisco Unified IP 8831 to register with CUCM it must (1) receive power and Layer-2/Layer-3 connectivity from the access-switch port and (2) obtain the address of its TFTP server (sent in DHCP option 150/66) so it can download its configuration file and register. If the switch port is administratively shut or err-disabled the phone never powers up or acquires an IP address. Even with a live port, failure to reach the option 150 server leaves the phone unable to fetch its SEP.cnf.xml file, so registration fails.

B. 8831 uses an RJ-45 Ethernet network port; the RJ-11 “PC” statement is irrelevant to IP registration.
C. HSRP on the access layer does not affect a single switched port’s ability to provide PoE or DHCP/TFTP reachability.
D. “RJ-65” is not a networking interface used by Cisco IP phones; cabling problems are covered by option A.

1. Cisco Unified IP Conference Phone 8831 Administration Guide, Rel. 10.5(1), “Phone Not Registering—Verify switch port state and PoE”, p. 7-3.

2. Ibid., “Verify DHCP Option 150/66 and network reachability to TFTP”, p. 7-4.

3. Cisco Unified Communications Manager System Guide, Rel. 12.5, Ch. 2 “Phone Registration Process”, pp. 2-6 to 2-7 (DHCP option 150 requirement).

4. Cisco TAC Knowledge Base Doc ID 116038 “IP Phone Fails to Register—Port state and DHCP/TFTP checks”, Sections 1 & 2.