How to make cisco terminal server serve unconnected consoles gracefully?

Hi,

  This is obviously not quite a conserver question, rather a question about
how to effectively use a cisco terminal server as a console server (which
I then use with conserver).

  When the device to which a console is connected is powered off, the
cisco allows a single connection and then disconnect, but then leaves
the line "logged in" despite the TCP disconnect and so future connections
are refused.

e.g.

conserver>sh line
 Tty Typ     Tx/Rx    A Modem  Roty AccO AccI   Uses   Noise  Overruns   Int
...
  38 TTY   9600/9600  -    -      -    -    -      0       0     0/0       -

fenestro% telnet 135.197.18.3 2038
Trying 135.197.18.3...
Connected to 135.197.18.3.
Escape character is '^]'.

conserver line 38 cubix06-console

telnet> quit
Connection closed.
fenestro% telnet 135.197.18.3 2038
Trying 135.197.18.3...
telnet: connect to address 135.197.18.3: Connection refused
telnet: Unable to connect to remote host

conserver>sh line
 Tty Typ     Tx/Rx    A Modem  Roty AccO AccI   Uses   Noise  Overruns   Int
...
* 38 TTY   9600/9600  -    -      -    -    -      2       0     0/0       -
...
conserver>sh users
    Line     User      Host(s)                  Idle Location
...
  38 tty 38            incoming             00:01:01 fenestro.attlabs.att.com

Line 38 is configured as:

line 38   
 location cubix06-console
 no exec
 exec-timeout 0 0
 transport input telnet
 transport output none
 flowcontrol hardware

and the terminal server is running

Cisco Internetwork Operating System Software 
IOS (tm) C2600 Software (C2600-I-M), Version 12.0(14), RELEASE SOFTWARE (fc1)


Any suggestions would be appreciated.

(Why is this a problem?  When a device gets into this state, conserver
can force the line down and so will miss its bootup messages, which might
be important/relevant.)

Thanks,
  Bill