How to configure Cisco Phone 7960 or 7940 with Elastix
Cisco Phone 7960 or 7940 comes default with SCCP firmware you need to change the firmware to SIP .
After the SIP firmware update you need to configure these phone to work with Elastix .
Cisco Phone 7960 or 7940 does not support XML configuration file it support cnf configuration file.
If my Phone MAC address is 0014A9713F98 then my configuration file name should be SIP0014A9713F98.cnf and place it in to Elastix server /tftpboot/ folder
I am giving simple example to configure one Extension . You can change according to your requirement.