There is no voting, there is only signalling. Signalling is not the same as voting.

Segwit uses BIP 9 for deployment. After the starting date (Nov 15th 2016 for segwit), miners can signal that they are ready to enforce the segwit rules by setting a specific bit in the version numbers of their blocks. This state is known as "Started". Once at least 1916 blocks in a 2016 block difficulty retarget period have signalled for segwit, the next retarget period will be in a state called "locked in". Locked in means that it will activate once that retarget period ends. The point of this time is to let everyone know that segwit will activate and give them time to update their nodes and wallets to support segwit if they want to use its features as soon as possible. Once the locked in retarget period ends, the state changes to "Active" and the segwit rules will be active.