Siemens AC75 Benutzerhandbuch

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AC75_ATC_V01.002

Page 105 of 569

10/30/06

Confidential / Released

The AT Commands described in this chapter allow the external application to determine various settings related

to the AC75's serial interface. 

[0]

(&F)

Disable flow control

1

XON/XOFF software flow control

2

Only CTS by DCE (TA)

3

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 

3 once again.

• When using XON/XOFF flow control (

1) in online mode, 

 should not be used while the data trans-

mission is paused with XOFF. Before entering the command mode with 

 the paused transmission should

be resumed using the XON character. 

• For compatibility reasons, the 

 command can be used in Multiplex mode, though the settings will not

take effect. However, be aware that whenever you use the 

 write command in Multiplex mode and then

save the current configuration to the user profile with 

, the changed 

 setting will become active after

restart. 

• With 

, flow control can be set separately for each data direction, while 

 applies to both directions. 

The two commands influence each other, i.e. settings made with 

 apply to 

 and, vice versa,

Exec Command

AT\Q

]

Response(s)

OK
If RTS/CTS flow control is not supported by interface and 

 is 2 or 3:

ERROR

Reference(s)

PIN

ASC0 ASC1 USB MUX1 MUX2 MUX3 Charge

4

Last

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