Siemens TC63 User Manual download pdf (Page 89)

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TC63 AT Command Set

4. Serial Interface Control Commands

TC63_ATC_V00.490 Page 89 of 501 5/24/05

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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 TC63's serial interface.

4.1 AT\Q Flow control

Syntax

Parameter Description

[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 AT\Q3 once again.

Notes

• When using XON/XOFF flow control (AT\Q1) 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 AT\Q command can be used in Multiplex mode, though the settings will not

take effect. However, be aware that whenever you use the AT\Q write command in Multiplex mode and then

save the current configuration to the user profile with AT&W, the changed AT\Q setting will become active after

restart.

• Flow control can also be set using AT+IFC.

Exec Command

AT\Q[<n>]

Response(s)

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

ERROR

Reference(s) PIN ASC0 ASC1 USB MUX1 MUX2 MUX3 Charge 4 Last

SIEMENS ! % % ! § § § ! % !

<n>

(num)(&W)(&V)

1 2 ... 84 85 86 87 88 89 90 91 92 93 94 ... 500 501

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