another openbsd -> ppp

with Debian, dialing is as easy as
'pon <myISP>'

And disconnecting is as easy as
'poff'

On OpenBSD, I have sucessfully connected :-) with
'ppp -ddial <myISP>'

Now, I do not know how to disconnect without
killing the process. Certainly there is a more
gracefull way than 'kill <PID>'?

v/r
-mike