AASTRA 6700i series, 9143, 9480i, 9480i CT SIP Administrator Guide EN - Manual (Page 724)

41-001343-01 Rev 03, Release 3.2.2 9-21
Why is my phone not receiving the TFTP IP address from the DHCP Server?
For DHCP to automatically populate the IP address or qualified domain name for the TFTP server,
your DHCP server must support Option 66. Option 66 is responsible for forwarding the TFTP
server IP address or domain name to the phone automatically. If your DHCP server does not
support Option 66, you must manually enter the IP address or qualified domain name for the TFTP
server into your IP phone configuration.
For procedures on configuring the TFTP server using the IP phone UI and the Aastra Web UI, see
Chapter 4, the section, “Configuring the Configuration Server Protocol” on page 4-104.
For specific protocol parameters you can set in the configuration files, see Appendix A, the
section, “Configuration Server Settings” on page A-19.