Telnet Charset Option (CHARSET)
Option code: 42
See also: RFC 2066
Early versions of Telnet assumed that ASCII charset is in use. This telnet option allowed switching to a different charset.
RFC 5198 introduces a default of UTF-8 for new protocols going forward, but notes in Appendix D that further work on a new telnet option would be needed to retrofit this to telnet, and does not change existing protocols.
| Tokens | Bytes | Meaning |
|---|---|---|
| IAC WILL NAWS | 255 251 31 | Client: I can negotiate charsets |
| IAC WONT NAWS | 255 252 31 | Client: I won't negotiate charsets |
| IAC DO NAWS | 255 253 31 | Server: Hey client, let's negotiate charsets |
| IAC DONT NAWS | 255 254 31 | Server: Sorry, I cannot negotiate charsets |
Handshake plus initial message
info
The charset can also be sent as a MNES variable