# 7940 - 7960 Series : ## Intro : You will need an IPv4 Network with : * DHCP server * TFTP server * physical access to the phone ## Factory reset sequence : When the phone start's up, (either POE or local adapter), dial the `#` until the screen starts up. When the screen tell's factory reset sequence, Dial `1 2 3 4 5 6 7 8 9 * 0 #` in that order. Phone will ask you if you want to save his network config. Dial 2 (network config erase). ## Flashing process : After factory reset, the phone will look up in the TFTP server for his own config file (`SEP.cnf.xml`) In the case of flashing to SIP firmware, that file has to contain the fact that it goes to SIP and a firmware version. All system files must be stored at the root of the TFTP server.