Forum Post: Supervision timeout in central device

Hi,

I am using CC2541F256.

I am using Central mode in my application.

I have kept following values in connection parameters

// minimum connection interval

#define DEFAULT_UPDATE_MIN_CONN_INTERVAL 400

// maximum connection interval

#define DEFAULT_UPDATE_MAX_CONN_INTERVAL      800

//supervision time out 

#define DEFAULT_UPDATE_CONN_TIMEOUT           600

i guess , after connection with peripheral device if i move my central device out of range from peripheral 

Central should take 6 seconds for link terminate.

But it takes around 18 seconds in my case.

What can be the reason for that