Multitech MTCBA-C-U-N2 Spezifikationen PDF herunterladen (Seite 66)

Chapter 4 – Serial Interface Control Commands

Multi-Tech Systems, Inc. AT Commands for EDGE (E1) Modems (S000474A) 66

4.5 AT\Q Flow Control

Syntax: Exec Command: AT\Q[<n>]

Responses: OK

If RTS/CTS flow control is not supported by interface and <n> is 2 or 3:

ERROR

Parameter:

<n>

0 Disable flow control. Default (This is the default value if the parameter is

omitted. It is also the factory default value and can be restored to 0 with AT&F)

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.

The value can be stored with AT&W.

The value can be displayed with AT&V.

Notes:

• When using XON/XOFF flow control (AT\Q1) in online mode, +++ should not be used while the data

transmission is paused with XOFF. Before entering the command mode with +++ the paused transmission

should be resumed using the XON character.

• With AT+IFC, flow control can be set separately for each data direction, while AT\Q applies to both

directions.

• The two commands influence each other, i.e. settings made with AT\Q apply to AT+IFC and, vice versa,

AT+IFC changes the AT\Q setting.

• This command is not PIN protected.

• This command is supported in airplane mode.

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