opening a telnet connection

[Anon]

I need to control another device using the telnet port
I have logged in using telnet and made sure all commands work
I thought this simple code would write commands to a telnet port
$fp = fsockopen( $ip, $port);
fwrite($fp,"Command\n\r");
fclose($fp);
but it doesn't seem todo much

any ideas?

Thanks in advance

Cheers

Callum