Twisted Conch for emulating a terminal?

[John F.]

I'm trying to figure out how to emulate a terminal with twisted conch
(I want to be able to send the client information with the 'write'
command in freebsd).  I have played with ssshsimpleclient.py on the
twistedmatrix site and it works but I need to keep the connection open,
not just execute a single command and exit.  Can someone point me to
some sample code or provide some advice?  Thanks.