Intel LAN+Modem56 PC Card PRO/100 - Manual (Page 137)

Modem Reference 6-13
X0 Result codes 0-4 enabled. Busy detect and dial tone
detect disabled.
X1 Result codes 0-5, and 10 enabled. Busy detect and dial
tone detect disabled.
X2 Result codes 0-6, and 10 enabled. Busy detect disabled
and dial tone detect enabled.
X3 Result codes 0-5, 7, and 10 enabled. Busy detect
enabled and dial tone detect disabled.
X4 Result codes 0-7, and 10 enabled. Busy detect and dial
tone detect enabled.
Note
Some countries do not allow busy detect or dial tone detect to be
disabled.
Yn Long Space Disconnect Option
The ATYn command, where n represents 0 or 1, determines whether or
not the modem will disconnect a call when it receives a long space (1.6
seconds Break) signal during a V.22bis connection.
Y0 Disables the long space disconnect facility (supported
for backward compatibility reference only).
Y1 Enables the long space disconnect facility (not supported).
Zn Recall Stored Profile
The ATZn command, where n represents 0, disconnects any call that is
currently in progress and reloads the user configuration profile stored in
nonvolatile memory as the active configuration profile.
Z0 Disconnect and reload the profile contained in storage
location 0 as the active configuration profile.
&Bn V.32 Automatic Retrain Options
The EtherExpress PRO/100 LAN/Modem PC Card always retrains. The
automatic retrain feature cannot be disabled.