]# cu -x9 -l /dev/rfcomm0 -s 115200 --debug all
cu: Stale lock /usr/spool/uucp/LCK..rfcomm0 held by process 18051 created 2007-07-04 13:51:37
cu: fconn_open: Opening port /dev/rfcomm0 (speed 115200)
cu: fconn_set: Changing setting to 0, 0, 2
Connected.
OK
cu: fconn_write: Writing 1 "A"
OK
cu: fconn_write: Writing 1 "T"
OK
cu: fconn_write: Writing 1 "A"
OK
cu: fconn_write: Writing 1 "T"
OK