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Modem Reference 6-11
O0 Instructs modem to leave online command mode and
return to data mode (see +++ Escape Sequence under
Special Commands)
O1 This setting issues a retrain command before returning
to online data mode.
O2 This setting issues a rate negotiation command before
returning to online data mode.
P Select Pulse Dialing
The ATP command instructs the modem to use pulse (rotary) dialing.
This mode will remain in force for all dialing procedures unless an ATT
command is issued or the dial string contains a T dial modifier.
Qn Result Code Display Options
The setting of the ATQn command, where n represents 0 or 1, deter-
mines whether or not result codes (such as OK, CONNECT, RING, NO
CARRIER, and ERROR) are displayed on your PCs screen.
Q0 Display of result codes enabled.
Q1 Display of result codes disabled.
Repeat command
See Special Commands at the beginning of this chapter.
T Select Tone Dialing
The ATT command instructs the modem to use tone dialing. This mode
will remain in force for all dialing procedures unless an ATP command is
issued or the dial string contains a P dial modifier. Tone dialing is the
factory-default setting.
Vn Result Code Format Options
The ATVn command, where n represents 0 or 1, determines if result
codes are displayed as numeric (short form) codes or words (long form).
Numeric result codes contain only one or two digits and this form could
be used, for example, when the modem is controlled by a software
terminal emulation program that uses script files. See the list at the