Apple Express Fax/Modem - Manual (Page 142)

X n Active result code The result codes listed in Vn are divided into subsets
that can be selected by the X command. Dial tone detection is enabled
by X2 or X4. Busy tone detection is enabled by X3 or X4. The
commands X0, X1, and X3 are appropriate for blind dialing. Blind
dialing means the modem dials out even though a dial tone is not
detected.
0 Selects result codes 0 through 4 and 8.
1 Selects result codes 0 through 5, 8, and 10 through 28.
2 Selects result codes 0 through 6, 8, and 10 through 28.
3 Selects result codes 0 through 5, 7, 8, and 10 through 28.
4 Selects all result codes.
Y n Remote break handling This command sets modem behavior for
responding to a long break signal received from a remote modem:
m Greater than 1.6 seconds for an asynchronous connection.
m An attention frame for MNP or V.42.
0 The modem ignores any long breaks received from the remote
modem.
1 On receiving a long break from the remote modem, the modem
goes on-hook (hangs up) and returns to command state.
2 On receiving a long break from the remote modem, the modem
returns to command state but remains connected to the remote
modem (does not hang up).
Z n Reset The Z command tells the modem to perform a software reset.
0 Loads Profile 0 into the active profile.
1 Loads Profile 1 into the active profile.
&C n DCD options Since bus modems have no DTE-DCE serial interface,
this command has no effect and remains for scripting compatibility.
0–2 Return OK.
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