Which three methods can remotely force a Cisco Unified Communications Manager Express phone to reset? (Choose three.)

Issuing shutdown followed by no shutdown on the PoE-enabled switch port cuts and restores power to the IP phone, forcing a full hardware reboot. This power cycle causes the phone to reload its firmware and re-register with the Cisco CME server. It is effective even when the phone software is unresponsive.

The restart command is not a valid command under ephone-dn configuration because ephone-dn defines directory numbers, not physical phone device behavior.

The reset command issued under a specific ephone configuration mode sends a software reset signal directly to that registered phone. This causes the phone to restart and re-register with CME, and it targets only the phone tied to that ephone entry without affecting others.

The reset command does not exist under ephone-dn configuration because ephone-dn manages dial-number assignments rather than controlling physical phone devices.

Under telephony-service configuration, the reset H.H.H command identifies and resets a specific phone by its MAC address. CME sends a reset notification to that phone, forcing it to restart and re-register. This method is useful when the ephone number is unknown but the MAC address is available.

The reset H.H.H MAC-address command is not valid in global configuration mode and must be issued under telephony-service configuration to take effect.