Specifications

TC35i AT Command Set

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TC35i_ATC_V01.05 Page 18 of 278 04.08.2003

2.3 AT\Qn Flow control

Execute command

AT\Q<n>

Response

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

ERROR

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

Recommended for the following procedures: in-

coming or outgoing data calls, fax calls, MUX

mode.

Often, the initialization routine of Fax programs in-

cludes enabling RTS/CTS handshake, eliminating

the need to issue AT\Q3 once again.

Reference

Note

· Factory default is 0 (no flow control). The setting of AT\Qn is stored volatile.

For use after restart it should be stored to the user defined profile (AT&W).

· When using XON/XOFF flow control ( AT\Q 1) 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.

· For compatibility reasons, the AT\Qn command can be used in Multiplex mode,

though the settings will not take effect. However, be aware that whenever you

use the AT\Qn write command in Multiplex mode and then save the current

configuration to the user profile with AT&W, the changed AT\Qn setting will be-

come active after restart.

· Flow control can also be set using AT+IFC. See Chapter 2.45.

· See also Chapter 1.6 for general information on flow control.