Numbered responses from the Personal Modem are more efficiently interpreted by
MacTerminal 2.0 than are string responses, so MacTerminal 2.0 puts the
Personal Modem into this "terse" mode by issuing the command ATV0. In terse
mode, the Personal Modem returns numbers instead of strings in response to
commands, such as returning a zero in place of the response string "OK".
You can take the Personal Modem out of terse mode by typing ATV1. The Personal
Modem responds to this command with the string "OK".
If you wish to reset all defaults, including the display of strings rather than
number codes, use ATZ -- or, of course, turn the modem off and then on.