Hi,
The command lslpp -h show me a lot of info, several programs was installed on that dates.
Looked in the inittab with no success, used fuser and found the program that use the tty, but nothing could found besides of that, configuration or other relevant info.
Also helped the use of ps -ef
Once found the relevant info, I opened a new question about GPS and tty Parameters
Connect GPS to serial port AIX 5.x
I consider bouth questions succesfully answered and closed