In particular, the SAF enables you to set up the following:
ttymon and listen port monitors by using the sacadm command
ttymon port monitor services by using the pmadm and ttyadm commands
listen port monitor services by using the pmadm and nlsadmin commands
Troubleshoot tty devices
Troubleshoot incoming network requests for printing service
Troubleshoot the Service Access Controller by using the sacadm command
The SAF is an open-systems solution that controls access to system and network resources through tty devices and local-area networks (LANs). The SAF is not a program, but a hierarchy of background processes and administrative commands.