E come devo usarlo? se lo lancio da terminale mi da:

[max@localhost ~]$ (echo "max";sleep 3;echo "prova") | telnet 192.168.4.200
Trying 192.168.4.200...
Connected to server (192.168.4.200).
Escape character is '^]'.
Kernel 2.4.22-1.2129.nptl on an i686

login: max
Password: Connection closed by foreign host.