автоматизированный разговорный скрипт с модемом (Automated conversational script with a modem)
SENDING EOT
The special reply string of EOT indicates that the chat program
should send an EOT character to the remote. This is normally the
End-of-file character sequence. A return character is not sent
following the EOT. The EOT sequence may be embedded into the
send string using the sequence ^D.