Optoma EH503 - Manual (Page 73)

English 73
How to have TELNET enabled in Windows VISTA / 7
By default installation for Windows VISTA, “TELNET” function is not
included. But end-user can have it by way of “Turn Windows features On
or Off” to be enabled.
1. Open “Control Panel” in Windows VISTA.
2. Open “Programs”.
User Controls