Cisco 7940 flashing issue

[roysealer]

hello, i have a cisco 7940 ip phone, can anyone help me to flash it with a new software, i want to use it as SIP.

I tried a lot ,it gives me "TFTP timeout oA"  on the screen

[K L]

Here you go:

Converting a Cisco 7940/7960 CallManager Phone to  a SIP Phone and the Reverse Process

http://www.cisco.com/en/US/products/hw/phones/ps379/products_tech_note09186a0080094584.shtml