User Guide

AT Command Set
MC35_ATC_01_V05.00 Page 20 of 256 15.07.2002
2.3 AT\Qn Flow control
Execute command
AT\Q<n>
Response
OK
Parameter
<n> 0 AT\Q0 No flow control
1 AT\Q1 XON/XOFF software flow control
2 AT\Q2 Only CTS by DCE
3 AT\Q3 RTS/CTS hardware flow control
Required for the following procedures: incoming
or outgoing data calls, fax calls, GPRS connec-
tions, CYCLIC SLEEP modes set with AT+CFUN.
Often, the initialization routine of Fax programs in-
cludes enabling RTS/CTS handshake, eliminating
the need to issue AT\Q3 once again.
Reference Note
Line state refers to RS-232 levels.
The setting of AT\Q is stored volatile and must be restored each time after the
GSM engine was switched off. Also, there is no way to store AT\Q to the user
defined profile.
See also Chapter 1.6 for general information on flow control.
2.4 ATA Answer a call
Execute command
ATA
TA causes remote station to go off-hook (e.g. answer call).
Note1: Any additional commands on the same command line are ignored.
Note2: This command may be aborted generally by receiving a character during
execution. It can´t be aborted in some connection setup states, such as
handshaking.
Response
Response in case of data call, if successfully connected:
CONNECT<text> TA switches to data mode.
Note: <text> output only if +ATX parameter setting with value > 0.
Response in case of voice call, if successfully connected:
OK
When TA returns to command mode after call release:
OK
Response if no connection:
NO CARRIER
Parameter
Reference
V.25ter
Note
See also AT+ATX and Chapter 9.1.5 for <text>