% pmadm -l
PMTAG          PMTYPE         SVCTAG         FLGS ID       <PMSPECIFIC>
ttymon0        ttymon         0              ux   root     /dev/term/0 - - /usr/bin/login - 9600 - login:  - - -  #/dev/term/0
...
zsmon          ttymon         ttya           u    root     /dev/term/a b - /usr/bin/login - contty6H ldterm,ttcompat login:  - 
dialup n  #dial in/out on serial port a

I turned them off:

for a in 0 1 2 3 4 5 6 7 ; do
    pmadm -r -p ttymon0 -s $a
done

>cat /etc/saf/_sactab
>ls /etc/saf