FA

ASCII message

FB

BINARY message

FC

Identifies the message

FF

No message to send, this line must not to be followed by a F>

FS

The other BBS will reject, accept or defer each message ( - + = )

FQ

Disconnects

FW

MYCALL

F>

End of proposal

B

Bulletin

P

Private

Number _ Callsign

Message Number Identifier

Number

Size of message in bytes