A wireless device receives a message from a first base station. The message comprises first configuration parameters for cells. Cells comprise cell groups. Cell groups comprise a first cell group for communication with the first base station, and a second cell group for communication with a second base station. The second cell group comprises an LAA cell, and RACH(s) configuration parameters for a RACH of the LAA cell. The wireless device performs an LBT procedure to transmit a preamble via the RACH of the LAA cell in response to initiating a random access process. The wireless device increments a counter in response to the LBT procedure indicating that the channel is occupied and determining a failure of the random access process in response to the counter reaching a first value. The wireless device transmits second message in response to the failure of the random access process.