Power on the terminal, press space bar to get into the Boot Monitor.
The current settings are displayed in the top area of the screen.
To configure for TFTP/BOOTP boot use console commands, e.g.:
IADDR 192.168.1.55 # the terminal's IP address
IGATE 192.168.1.1 # the domain's gateway
IHOST 0.0.0.0 # should look for boot host
BMETHOD tftp # set the boot method
BPATH /tftpboot/tekxp/boot/os.350 # boot path on the boot host, if different
BAFrom NVRAM # important if no name services available
NVsave # remember