The value of the parameter one. This parameter defines a character on its receipt the PAD alternates the state from data-transfer in connection-in-progress. This allows the start-stop mode DTE to initiate an escape from the data-transfer state or the connection-in-progress state in order to send PAD command signals. The value 0 means that the escape from data-transfer state and recall of the PAD is not possible. The value 1 means that the escape is possible by character DLE(Ctrl-P). The values 32-126 mean that the escape is possible by graphic character defined by the user.