Product specifications

Administrator's Manual 6. Troubleshooting
Version 2.0.1 77 May 2013
The configuration you created is displayed in the text pane.
2. Click the Loading new Configuration File button:
Figure 6-4: Web Interface - Load New Configuration File
3. Click Browse and select the cfg file you created; the phone verifies that it's related to
the phone model. The cfg is then loaded to the phone. Once loaded, the phone
reboots (indicated on the LCD). The phone is now loaded with the cfg configuration file
you created.
6.7.3 Recovering Firmware
If the phone is powered off for some reason during the firmware upgrade process, the
phone becomes unusable.
 To recover the phone firmware:
1. Ensure that your DHCP server supports Options 66 (TFTP server address) and 67
(firmware file), and that these are configurable.
2. Before connecting the phone, verify that the TFTP server is running and the firmware
file for recovery is located in the correct location.
3. Connect your phone to the IP network, and then connect the phone to the power
outlet;
a. The phone sends a TFTP request to the IP address indicated in the DHCP Option
66 field to retrieve the firmware file indicated in the DHCP Option 67 field.
b. The phone, in the DHCP Discover message sends its model name in the DHCP
Option 77 field. The DHCP server, according to the phone model, sets the
appropriate firmware file name in the DHCP Option 67 field sent to the phone
(e.g., 420HD_1.4.1_build_32.img).
c. The phone then upgrades to the recovery firmware.
d. After the firmware upgrade process completes, the phone boots up successfully.
6.7.4 Restarting the Phone
The IP Phone can be restarted from phone's LCD or the Web interface.
6.7.4.1 Restarting the Phone from the LCD
This section shows how to restart the phone from its LCD.
 To restart the phone from its LCD:
1. Select the Restart submenu (MENU key > Administration > Restart):