Specifications

Administrator's Manual 4. Web-based Management
Version 1.0.2 61 October 2009
4.8.2.2 Using DHCP Options
You can upgrade your phone’s firmware using DHCP options mechanism with TFTP. This server
can be remote or set up to run on a PC.
Note: Ensure that your DHCP server supports Options 60 (phone’s model name), 66
(TFTP server address), and 67 (firmware file), and that these are configurable.
¾ To upgrade your phone’s firmware using DHCP Options:
1. Before connecting the phone, verify that the TFTP server is running and the firmware file is
located in the correct location.
2. Connect your phone to the IP network, and then connect the phone to the power outlet.
3. After system initialization, 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. At
this stage, the phone retrieves only a small portion of the firmware file to check the firmware
version.
4. The firmware version is checked and if the version is different from the one currently running
on the phone, the phone reboots and uploads the complete firmware file from the TFTP
server and burns it to the flash memory.