[Simh] modem control, disconnects, login delay

[Thomas Pfau]

I have been trying to set up the simulator so that connections to the
DH/DZ are disconnected at logout and VMS sessions are logged out if the
telnet session is disconnected.  To implement this, I have turned on modem
control and hangup in simh and in VMS.  Telnet sessions are dropped when
logging out but I have had mixed success getting dropped telnet sessions
to force a logout.

With the DHU/DHV in either mode there appears to be no signal to VMS when
a disconnect occurs.  Sessions remain active and the next telnet session
connects to a logged in terminal.

With the DZ, the user is logged out on the telnet disconnect but there is
a long delay (at least 30 seconds) before getting the username prompt
after pressing enter and the system announcement message is not always
displayed.

Here are the relevant lines from the simh init file:

set dz enabled lines=4
attach -am dz 3900
set vh enable lines=8 modem hang
attach vh 3901

On VMS, I set all terminal lines /MODEM/HANG/PERM.

What are the proper settings to get this to work?

Also, I notice that setting the LINES parameter on the VH device to 8 does
not reduce the number of units.  As a result, VMS still sees 4 interfaces
(32 lines).


-- 
tom_p
http://nbpfaus.net/