Rebooting Cisco Call Manager Express Phones

This topic discusses rebooting IP phones.

Rebooting Cisco CallManager Express Phones

Reset Command

Restart Command

• Hard reboot

• Soft reboot

• Phone firmware changes

• Phone buttons changes

• User locales changes

• Phone lines changes

• Network locales changes

• Speed-dial number changes

• URL parameters changes

• No DHCP or TFTP invoked

• DHCP and TFTP invoked

• System message changes

• Takes longer than restart

After you update information for one or more phones associated with a Cisco CME router, the phone or phones must be rebooted. There are two commands to reboot the phones: reset and restart. The reset command performs a "hard" reboot similar to a power-off-power-on sequence. It reboots the phone and contacts the DHCP server and TFTP server to update from their information as well. The restart command performs a "soft" reboot by simply rebooting the phone without contacting the DHCP and TFTP servers. The reset command takes significantly longer to process than the restart command when you are updating multiple phones, but it must be used after updating phone firmware, user locale, network locale, or URL parameters. For simple button, line, or speed-dial changes, you can use the restart command.

Use the reset (ephone) command to perform a complete reboot of an IP phone when you are in ephone configuration mode. This command has the same effect as a reset (telephony-service) command that is used to reset a single phone.

Router Configuration: Two Commands (Cont.)

CMERouter(config-telephony-service)#

reset {all [time-interval] | cancel | mac-address | sequence-all}

• Sets the date format for IP phone displays

CMERouter(config-ephone)#

reset

• Resets a specific ephone

To perform a complete reboot of one or all phones associated with a Cisco CME router, use the reset command in telephony-service configuration mode.

When using the reset command from telephony service mode, the default time interval of 15 seconds is recommended for an 8- to 10-phone office so that all the phones do not attempt to access TFTP server resources simultaneously. This value should be increased for larger networks.

When you use the reset sequence-all command, the router waits for one phone to complete its reset and reregister before starting to reset the next phone. The delay provided by this command prevents multiple phones from attempting to access the TFTP server simultaneously and therefore failing to reset properly. Each reset operation can take several minutes when you use this command. There is a reset timeout of 4 minutes, after which the router stops waiting for the currently registering phone to complete registration and starts to reset the next phone.

If the router configuration is changed so that the XML configuration files for the phones are modified (changes are made to user locale, network locale, or phone firmware), then whenever you use the reset all or restart all command, the router automatically executes the reset sequence-all command instead. The reset sequence-all command resets phones one at a time in order to prevent multiple phones trying to contact the TFTP server simultaneously. This one-at-a-time sequencing can take a long time if there are many phones. To avoid this automatic behavior, use the reset all time-interval command or the restart all time-interval command with an explicit argument that is not equal to the default 15-second time interval; for example, set a time interval of 14 seconds. If a reset sequence-all command has been started in error, use the reset cancel command to interrupt and cancel the sequence of resets.

To perform a complete reboot of a single phone associated with a Cisco CallManager Express router, use the reset command in ephone configuration mode.

Router Configuration: Two Commands (Cont.)

CMERouter(config-telephony-service)# restart {all [time-interval] | mac-address}

• Sets the date format for IP phone displays

CMERouter(config-ephone)# restart

• Restarts the ephone

This command causes the system to perform a fast phone reset in which only the button template, lines, and speed-dial numbers are updated on the phone. For updates related to phone firmware, user locale, network locale, or URL parameters, use the reset command.

Use the restart command to reboot IP phones after quick changes to buttons, lines, and speed-dial numbers. This command is much faster than the reset command because the phone does not access the DHCP or TFTP server.

To restart a single phone, use the restart command with the mac-address argument or use the restart command in ephone configuration mode.

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