I don't know anything about using Telnet to connect to another computer, but I found this here click here
If telnet is not able to connect to the remote host specified in <hostname> or establish a connection on the <port> specified, it will report an error similar to the following:
C:> telnet fred.plus.com <CR>
Connecting To fred.plus.com...Could not open connection to the host, on port 23: Connect failed
C:> telnet mail.plus.net 60 <CR>
Connecting To mail.plus.com...Could not open connection to the host, on port 60: Connect failed.
C:> telnet 126.96.36.199 74 <CR>
Connecting To 188.8.131.52...Could not open connection to the host, on port 74: Connect failed.
If this happens check you have the correct hostname / IP address and port and try again.
There are several ways in which the telnet program can be run in Windows: