What we are doing is replacing our dumb serial terminals with the serial device servers. We then use a terminal emulator to create a telnet session with the device server. Cabling is simpler, and it's very stable.
IceTCP has never worked in this configuration. Smartterm does, but I would prefer to use IceTCP for a variety of reasons, not the least of which is our existing licensing.
IceTCP does work if we directly telnet to the server vs. using the intermediate serial device server. The direct telnet connections corrupt files if they unexpectedly terminate or do not terminate correctly, which IceTCP manages to do once a week or so on each workstation.
We can interchange the serial device server with the following three options and they all work.
1) replace device server with dumb terminal.
2) replace device server with PC running really old serial version of DejaWin
3) use device server, PC has telnet session (using Smartterm) to device server, device server has serial connection to Unix server.
Thanks,
James