said by pulsar777:and the address of ATA web interface will be an IP address of Server interface from tftpd32?
Once the ATA has successfully read by TFTP (and presumably applied) your config file, you can restore your normal setup and access the ATA's web interface as usual.
The ATA's WAN address is normally what it got by DHCP. If you pick up the phone and dial **** (hear configuration menu prompt) and then 110#, you should hear the IP address spoken. If you open a web browser at that address with /admin/ (e.g. if address is 10.11.12.13, use 10.11.12.13/admin/) you should get a prompt for username (use admin) and password (use whatever you set).
If you don't get the prompt, confirm that you can ping the ATA. If not, check that ATA and PC are on the same subnet, etc. If you can ping it but not access the web page, dial **** then 7932#. If prompted for password, enter the admin password you set, followed by #. Enter 1# for value and 1 to save. Then, try to access the web page again.
If no luck, dial **** then 210# to hear the LAN address (defaults to 192.168.0.1). Temporarily connect a PC to the LAN port and try to access that address, e.g. 192.168.0.1/admin/ .