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4.
Serial Interface Control Commands
The AT Commands described in this chapter allow the external application to determine various settings related
to the MC55's serial interface.
4.1
AT\Q Flow control
Syntax
Exec Command
AT\Q[<n>]
Response(s)
OK
If RTS/CTS flow control is not supported by interface and
ERROR
Reference(s)
SIEMENS
Parameter Description
(num)(&W)(&V)
<n>
(&F)
[0]
1
2
3
Notes
•
When using XON/XOFF flow control (AT\Q1) in online mode,
mission is paused with XOFF. Before entering the command mode with
be resumed using the XON character.
•
For compatibility reasons, the
take effect. However, be aware that whenever you use the
save the current configuration to the user profile with AT&W, the changed
restart.
MC55_ATC_V04.00
Confidential / Released
PIN
!
Disable flow control
XON/XOFF software flow control
Only CTS by DCE (TA)
RTS/CTS hardware flow control
Recommended for the following procedures: incoming or outgoing data calls,
fax calls, MUX mode.
Often, the initialization routine of Fax programs includes enabling RTS/CTS
handshake, eliminating the need to issue AT\Q3 once again.
command can be used in Multiplex mode, though the settings will not
AT\Q
Page 85 of 475
is 2 or 3:
<n>
ASC0 ASC1
MUX1
MUX2
%
%
§
§
should not be used while the data trans-
+++
the paused transmission should
+++
write command in Multiplex mode and then
AT\Q
setting will become active after
AT\Q
MUX3 Charge
Last
§
!
!
!
3/17/06
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