| | RFC 856 (rfc856) - Telnet Binary Transmission |
 | | If the connection is not already being operated in binary transmission mode, the sender of this command REFUSES to begin transmitting characters which are to be interpreted as binary characters by the receiver of the data (i.e., the sender of the data demands to continue transmitting characters in its present mode). |
 | | Description of the Option With the binary transmission option in effect, the receiver should interpret characters received from the transmitter which are not preceded with IAC as 8 bit binary data, with the exception of IAC followed by IAC which stands for the 8 bit binary data with the decimal value 255. |
 | | Implementation of the binary transmission option, as is the case with implementations of all other TELNET options, must follow the loop preventing rules given in the General Considerations section of the TELNET Protocol Specification. |
| www.faqs.org /rfcs/rfc856.html (1095 words) |