Need help decoding 433 signals

[dvsxutact]

I need to implement a new "protocol" to support some custom hardware my company wants to continue using, its older hardware that uses a very unique set of 433mhz messages to communicate, we don't know the full set of commands, but we have learned that it seems like we have to measure the time between pulse 1 and pulse 2 to determine if the pulse is a 0 or a 1... whats more, is there is a specific wake-up that we need to listen for...

I am very new to hardware programming and 433 communications so i am very out of my depth here, so I am not sure if this is something that can be done any help would be greatly appreciated.