AT

Function

Result

Command

Code

 

 

 

 

ATXn

Accepted but ignored.

OK n=0 to 3

ERROR

 

 

Otherwise

ATYn

Accepted but ignored.

OK n=0 or 1

ERROR

 

 

Otherwise

ATZn

Accepted but ignored. (Soft Reset and restore Profile).

OK n=0 or 1

ERROR

 

 

Otherwise

 

DCD Option. The Digi Device Server controls the DCD output in accor-

 

 

dance with the parameter supplied. The parameter value, if valid is written

OK n=0 or 1

AT&Cn

to S21 bit 5.

ERROR

&C0 DCD remains ON at all times.

 

Otherwise

 

&C1 DCD follows the state of the connection

 

 

DTR Option. This command interprets the ON to OFF transition of the DTR

 

 

signal from the DTE in accordance with the parameter supplied. The param-

 

 

eter value, if valid, is written to S21 bits 3 and 4. Also see S25.

 

 

&D0 -DTR is ignored (assumed ON). Allows operation with DTEs which

 

 

do not provide DSR.

OK n=0 to 3

AT&Dn

&D1DTR drop is interpreted by the modem as if the asynchronous escape

ERROR

sequence had been entered. The modem returns to asynchronous com-

 

Otherwise

 

mand state without disconnecting.

 

 

 

&D2DTR drop causes the modem to hang up. Auto-answer is inhibited.

 

 

(Default.)

 

 

&D3DTR drop causes the modem to perform a soft reset as if the Z com-

 

 

mand were received. The &Y setting determines which profile is loaded.

 

 

Restore Factory Configuration (Profile)

 

 

The Device Server loads the factory default configuration (profile). The fac-

OK n=0 or 1

AT&Fn

tory defaults are identified for each command and in the S-Register descrip-

ERROR

tions. A configuration (profile) consists of a subset of S-Registers.

 

&F0Restore factory configuration 0.

Otherwise

 

 

 

&F1Restore factory configuration 1.

 

AT&Jn

Accepted but ignored.

OK n=0 or 1

ERROR

 

 

Otherwise

AT&Gn

Accepted but ignored.

OK n=0 or 1

ERROR

 

 

Otherwise

AT&Jn

Accepted but ignored.

OK n=0 or 1

ERROR Other-

 

 

wise

 

Flow control. This command defines the DTE/DCE flow control mechanism.

 

 

The parameter value, if valid, is written to S39 bits 0, 1, and 2.

 

 

&K0 Disables flow control

OK n=0,3,4,5,or 6

AT&Kn

&K3 Enables RTS/CTS flow control (Default)

ERROR

 

&K4 Enables XON/XOFF flow control

Otherwise

 

&K5 Enables transparent XON/XOFF flow control

 

 

&K6 Enables both RTS/CTS and XON/XOFF flow control.

 

AT&Ln

Accepted but ignored.

OK n=0, 1, 2

ERROR

 

 

Otherwise

Chapter 9 Modem Emulation

39

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Image 39
Digi W manual ATXn Accepted but ignored