3.4.5 Flushing Output

A User Telnet program SHOULD provide the user the ability to specify whether or not output should be flushed when an IP is sent; see Section 3.2.4.

For any output flushing scheme that causes the User Telnet to flush output locally until a Telnet signal is received from the Server, there SHOULD be a way for the user to manually restore normal output, in case the Server fails to send the expected signal.