I've had varying results, but in some setups I've noticed that I cannot
invoke a usable telnet session to a windows telnet server (running
Microsoft's native telnet server). The return key doesn't work and the
characters I type are sent in chunks. I've mainly run into this behavior
when I've configured the windows telnet server to run on a non-standard
port, like port 923.
To address the issue, update /etc/telnetrc or a .telnetrc in your home...