Which of the following will occur when you press the **#** keypad sequence at the Settings menu of a Cisco IP
phone? (Select the best answer.)

A.
The phone will dial the voice mail pilot number.

B.
The phone will be restored to the factory default settings.

C.
The phone will restart.

D.
The phone will reset.

Explanation:
The phone will reset when you press the **#** keypad sequence at the Settings menu of a Cisco IP phone. You
can access the Settings menu by pressing the settings button on the phone’s keypad. An IP phone reset willreinitialize the phone, which means that the phone will reboot, contact the Dynamic Host Configuration Protocol
(DHCP) server to obtain network configuration information, and then download its configuration file from the
Trivial File Transfer Protocol (TFTP) server. The IP phone will also unregister and reregister with the Cisco call
processor platform. You can also reset an IP phone in IOS on a Cisco Unified Communications Manager
Express (CME) router by issuing the reset command in ephone configuration mode. You can reset all IP
phones on a network by issuing the reset all command in telephony services configuration mode. You can
perform a reset in the Cisco Unified Communications Manager (UCM) graphical user interface (GUI) by clicking
Device > Phone > Reset.
You must reset a phone after performing the following tasks:
Updating the phone’s firmware
Modifying the DHCP scope
Changing the IP address of the TFTP server
Changing Uniform Resource Locators (URLs)
Changing the date and time settings
Changing the language displayed on the phone
Changing the call progress tones for the phone
Changing the voice mail access number
The phone will not restart when you press the **#** keypad sequence at the Settingsmenu of a Cisco IP phone.
An IP phone restart is different from a reset because a restart does not contact the DHCP server. Instead, the
phone will store and reuse the network configuration information that was previously obtained from the DHCP
server. However, a restarted phone does connect to the TFTP server to download configuration updates. In
addition, the IP phone will unregister and reregister with the Cisco call processor platform. Because restarting
an IP phone circumvents the DHCP server, a restart brings the phone back to working order faster than a reset.
You can restart an IP phone by issuing the restart command in ephone configuration mode on a CME router.
You can also restart all IP phones at once by issuing the restart all command in telephony services
configuration mode.
You can either reset or restart a phone after performing the following tasks:
Adding or deleting a phone button
Associating a button with a new ephonedn
Modifying an extension on an ephonedn
Modifying speeddial numbers on an ephone
Enabling call park
The phone will not be restored to the factory default settings when you press the **#** keypad sequence at the
Settings menu of a Cisco IP phone. The method you use to restore a Cisco IP phone to factory default settings
varies by phone model. However, no Cisco IP phone can be restored to the factory default settings by pressing
the **#** sequence at the Settings menu. When an IP phone is restored to the factory default settings, any
configuration changes that might be stored on the IP phone itself are restored to the factory default settings.
The phone will not dial the voice mail pilot number when you press the **#** keypad sequence at the Settings
menu of a Cisco IP phone. To access voice mail from an IP phone, you should press the messages button on
the IP phone keypad. The IP phone should automatically dial the voice mail pilot number. If the phone’s
handset is on the hook, the voice mail system will use the IP phone’s builtin speaker to provide the audio for the
voice mail session.

https://www.cisco.com/c/en/us/support/docs/voice-unified-communications/unified-ip-phone-7900-series/16049-
faq-ipphone.html#trouble
https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cucme/admin/configuration/manual/cmeadm/
cmereset.html#pgfId-1009231