This RFC specifies a standard for the Internet community. Hosts on the Internet that exchange terminal speed information within the Telnet protocol are expected to adopt and implement this standard. Distribution of this memo is unlimited. This information is used to control various timing-dependent display processes, e.g., the number of padding characters used for delay.
Some software also has user interfaces that are tuned differently for fast and slow terminals.
The purpose of this option is to provide similar information for telnet connections. The code for SEND is 1. IAC SE Sender is stating his terminal speed. The code for IS is 0. Description of the Option WILL and DO are used only to obtain and grant permission for future discussion.