. Decoded, this string represents a for the 7975 model series , running the standard open Session Initiation Protocol ( sip ) , utilizing firmware version 9.4(2) Service Release 4 ( 942sr4 ) , packaged natively as a compressed archive ( zip ) for standalone TFTP server deployment.

: If your phone is currently running a version earlier than 8.3(3) , you cannot jump directly to 9.4(2). You must first upgrade to an intermediate version (such as 8.5(2)) before applying the 9.4 load.