User's Manual

X – Result Code Type/Call Progress
This command determines which modem result codes are enabled.
Additionally, this command specifies whether busy and dial tone detection are
enabled or disabled..
ATX0 Result codes 0-4 enabled. Busy and dial tone detect disabled.
ATX1 Result codes 0-5, 10 and above enabled. Busy and dial tone detect
disabled.
ATX2 Result codes 0-6, 10 and above enabled. Busy detect disabled and
dial tone detect enabled.
ATX3 Result codes 0-5, 7, 10 and above enabled. Busy detect enabled
and dial tone detect disabled.
ATX4 Result codes 0-7, 10 and above enabled. Busy and dial tone detect
enabled (factory setting).
Y – Long Space Disconnect
This command determines whether the modem disconnects after receiving 1.6
seconds of silence and whether the modem sends a period of silence to the
remote modem before disconnecting.
ATY0 Disables long space disconnect (factory setting)
ATY1 Enables long space disconnect. The modem disconnects after
receiving 1.6 seconds of silence from the remote modem.
Additionally, after receiving an ATH0 command, the modem sends at
least 4 seconds of silence before hanging up.
Z – Reset Modem/Recall Stored Profile
This command causes the modem to go on-hook (hang-up), perform a warm
reset, and load user-configuration profile ’n’ (previously stored in the NVRAM)
into the active profile. The Zn command must be the last command in
command string, as it causes all subsequent commands to be ignored.
ATZ0 Resets the modem and recalls user profile 0.
ATZ1 Resets the modem and recalls user profile 1.
&C – DCD (Data Carrier Detect) Option
This command controls how to modem functions in relation to the DCD or
RLSD signal.
&C0 State of carrier from remote modem is ignored. DCD is always on.
&C1 State of carrier from remote modem is tracked. DCD reflects the
state of the received carrier.
AT COMMANDS: DATA MODEM 2-9