Which configuration step is necessary for a Cisco SIP phone to synchronize its time with a specific source?

Which configuration step is necessary for a Cisco SIP phone to synchronize its time with a specific source?
A . Change the Time Zone from "America/Los_Angeles" to "Etc/GMT+8".
B . Add a phone NTP Reference to the date/time Group.
C . Assign the device to the correct region.
D . Change the time format from 24-hour to 12-hour.

View Answer

Answer: B

Explanation:

https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cucm/admin/10_0_1/ccmcfg/CUCM_BK_C95ABA82_00_admin-guide-100/CUCM_BK_C95ABA82_00_admin-guide-100_chapter_0110.html